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  1. Table of Contents
  2. Intro
  3. Design
    1. Stand
    2. Ergonomics
    3. Back
    4. Borders
    5. Thickness
    6. Build Quality
  4. Picture Quality
    1. Contrast
    2. Local Dimming
    3. SDR Peak Brightness
    4. HDR Peak Brightness
    5. Horizontal Viewing Angle
    6. Vertical Viewing Angle
    7. Gray Uniformity
    8. Black Uniformity
    9. Pre Calibration
    10. Post Calibration
    11. SDR Color Gamut
    12. SDR Color Volume
    13. HDR Color Gamut
    14. HDR Color Volume
    15. Image Retention
    16. Reflections
    17. Gradient
    18. Color Bleed
  5. Motion
    1. Motion Blur
    2. Image Flicker
    3. Refresh Rate
  6. Inputs
    1. Input Lag
    2. Resolution and Size
    3. Main Inputs
    4. Other Inputs
    5. Total Inputs
  7. Features
    1. Additional Features
    2. On-Screen Display (OSD)
    3. Controls
    4. In The Box
  8. Conclusion
  9. Q&A
Reviewed on Nov 24, 2017 , Ian Cumming, Mehdi Azzabi, Eric Bousquet

Samsung CHG70 Curved Gaming Monitor
MONITOR REVIEW

Usage Ratings - Version 1.0
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Test Benches:

  • 1.0: Fall 2017
7.8 Mixed Usage
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Score components:
  • 30% Office
  • 30% Multimedia
  • 25% Gaming
  • 10% Media Creation
  • 5% HDR Gaming
7.4 Office
8.5 Gaming
7.7 Multimedia
7.7 Media Creation
7.3 HDR Gaming
Size : 27 "
Resolution : 2560x1440
Refresh Rate : 144 Hz
LCD Type
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What it is: Type of LCD technology used by the monitor.
When it matters: Different technologies have different viewing angle properties.
:
VA

The Samsung CHG70 is a very good VA-type 27" LCD monitor with better picture quality than average. It has a high contrast ratio as well as support for both HDR and wider color gamuts. It's especially great for gaming thanks to its high refresh rate of 144 Hz, low input lag, and FreeSync support. While it is quite versatile and sports a decently flexible stand, its narrow viewing angle makes it less suitable for environments where sharing with neighbors is commonplace.

Test Results
Design 8.0
Picture Quality 7.1
Motion 9.1
Inputs 9.1
Pros
  • High contrast gives good picture quality
  • High refresh rate for gaming
  • Wide color gamut and HDR support
Cons
  • Cloudy blacks lack uniformity
  • Narrow viewing angles

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8.0

Design

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Score components: Subjectively assigned
Samsung CHG70 Design Picture
Curved : Yes
Curve radius : 1800R
Weight (without stand) : 10.0lbs (4.5 kg)
Weight (with stand) : 13.6lbs (6.2 kg)

The design of the Samsung CHG70 is a bit different to most other monitors. Although it looks great and is quite practical, there are a couple of tradeoffs with the unique design. For example, the arm of the stand means that it can't be placed close to a wall - especially if the monitor is at a low position. Ergonomic adjustments also aren't as good as some other monitors, so it may be slightly more difficult to find a comfortable setup.

Stand
Samsung CHG70 Stand picture
Width : 20.3" (51.6 cm)
Depth : 12.1" (30.8 cm)

The Samsung CHG70 has a similar stand base to their TVs such as the MU8000, and for a monitor, it is a relatively large footprint. It does feel stable though and provides good support.

7.1 Ergonomics
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What it is: How much the position of the screen can be adjusted to match the viewing preference of the user.
When it matters: All usages, but especially office and gaming use.
Score components:
  • 45% Height Adjustment
  • 18% Switch portrait/landscape
  • 18% Swivel Range
  • 18% Tilt Range
Samsung CHG70 Ergonomics picture
Height Adjustment : 5.7" (14.4 cm)
Switch portrait/landscape : Yes
Swivel Range : -15° to 15°
Tilt Range : -15° to 5°

The ergonomic adjustments of this Samsung CHG70 monitor are very different to other monitors. When moved up and down, the screen stays in the same orientation but the two pieces that make up the arm of the stand.

Back
Samsung CHG70 Back picture
Wall Mount : Vesa 100x100

The rear of the monitor looks stylish. It is made of plastic but has a matte finish. Where the stand arm joins the monitor, there is a ring of LEDs which pulse during use. It is possible to mount the monitor using the included adapter.

Borders
Samsung CHG70 Borders picture
Borders : 0.6" (1.5 cm)

The borders of the Samsung C27HG70 look sleek and are thin. The sides are made of a silver colored plastic, which looks good.

Thickness
Samsung CHG70 Thickness picture
Thickness (with stand) : 11.2" (28.5 cm)
Thickness (without stand) : 2.5" (6.4 cm)

The monitor itself is quite thin when viewed from the side, however, the stand takes up a lot of desk space. Depending on the height that it is set at, the stand protrudes out the back by a different amount. When at the lowest position, the monitor can sit 13.39" (34.0 cm) from a wall (shown here). The thickness measurement above is when the monitor is set to the maximum height, visible (here).

8.0 Build Quality
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What it is: How well built and sturdy the monitor is, and how good the materials used to build it are.
When it matters: All usages.
Score components: Subjectively assigned
Samsung CHG70 Build Quality picture

The build quality of the Samsung C27HG70 is great. The unique design feels well constructed, despite the plastic parts.

The Samsung CHG70 monitors have a better than average picture quality. When used in a dark room or dim environment, the VA panel used in its construction really make it an excellent choice for those conditions. The very good contrast ratio means that the CHG70 can display deep blacks, which is particularly important for dark multimedia content or dark video games. The black uniformity is poor though and the local dimming can really help that much at obtaining deeper black. If used in a bright room, the CHG70 still fair pretty good, as it can get bright enough to fight glare and the screen finish does a very good job at dealing with reflections. The viewing angle is disappointing though, but this is the downside of using a VA panel in a monitor. The gray uniformity is excellent on the CHG70 and dirty screen effect is really not a problem here. Finally, HDR is better than average on the CHG70, as it got a decent HDR peak brightness and a very good coverage of the HDR color gamut. The only thing lacking that would really make HDR even better here would be a better local dimming, as the implementation is very bad and can't really help that much at making small highlight brighter or raising the contrast ratio more than what it already is.

7.8 Contrast
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What it is: Brightness difference between white and black. This is the main component of picture quality.
When it matters: Always, but especially when watching dark scenes.
Score components:
Samsung CHG70 Checkerboard Picture
Native Contrast
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What it is: Ratio of the white brightness divided by the blacks measured on our checkerboard test pattern with a white target of 100 cd/m².
When it matters: Dark scenes in a dark room.
Good value: > 3,000
Noticeable difference: 500
:
2925 : 1
Contrast with local dimming
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What it is: Ratio of the white brightness divided by the blacks measured on our checkerboard test pattern with local dimming turned on (maximum) with a white target of 100 cd/m².
When it matters: Dark scenes in a dark room.
Good value: > 3,000
Noticeable difference: 500
:
2922 : 1

The Samsung CHG70 has a very good native contrast ratio. With this high native contrast ratio, the CHG70 can display deeper blacks than what other IPS monitors can do, especially when it is used in a dark environment.

The contrast ratio with local dimming set to 'On' is almost the same as the native one since the zones are quite big and when displaying our checkerboard test pattern, the local dimming is not really effective at lowering the black level of the black square.

2.0 Local Dimming
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What it is: The lights behind the LCD layer adapt to the picture displayed, improving the contrast ratio.
When it matters: Dark scenes viewed in a dark room.
Score components: Subjectively assigned
Local Dimming
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What it is: Whether it has a feature that controls the LEDs behind the LCD layer, to match the picture and darkens the dark portion of it.
When it matters: On LED TVs only. Dark scenes viewed in a dark room.
:
Yes
Backlight
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What it is: Configuration of the lights of the backlight.
When it matters: Effectiveness of the local dimming.
Good value: Full-array/direct lighting is better for local dimming. As for the uniformity of the screen, it depends on the implementation. Some edge-lit monitors have more uniform blacks than some full-array monitors.
:
Edge

The local dimming on this Samsung monitor is bad. The number of zones is very limited, and they are implemented horizontally, which is especially visible when looking at the smaller highlight in our local dimming video. When the small highlight moves vertically, you can see the large horizontal local dimming zones turning on and off.

Another bad aspect of the local dimming is that it makes everything on screen much darker. When measuring the contrast ratio with local dimming, we had to raise the luminance of the monitor considerable to reach the same 100 cd/m². Since the zones are really large, it did not really change for the better the contrast ratio.

The one positive aspect of this type of implementation of local dimming, is that when watching movie with black letterbox, the top, and black bottom bars should remain much darker and free of blooming.

Note that when the local dimming feature is set to 'Auto', the local dimming will be turned on only when HDR is detected.

8.0 SDR Peak Brightness
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What it is: How bright the screen can get. Measured with local dimming and with SDR content.
When it matters: Bright living rooms; bright objects; SDR content.
SDR Real Scene
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What it is: The maximum luminosity the TV can obtain while playing a movie or while watching a TV show. Our Real Scene was selected to represent a more regular movie condition. All measurements are made with the TV set to be as bright as possible, but with a 6500k white. Measured with local dimming on, max backlight and with an SDR signal. Scene: here.
When it matters: When watching movies and TV shows in SDR.
:
352 cd/m²
SDR Peak 2% Window
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What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 2% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: Bright highlights, present on screen for a short time
:
571 cd/m2
SDR Peak 10% Window
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What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 10% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: Bright objects, present on screen for a short time
:
576 cd/m2
SDR Peak 25% Window
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What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 25% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: When watching in a bright room.
:
376 cd/m2
SDR Peak 50% Window
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What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 50% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: When watching in a bright room.
:
380 cd/m2
SDR Peak 100% Window
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What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 100% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: When watching in a bright room.
:
381 cd/m2
SDR Sustained 2% Window
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What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 2% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: Bright highlights, persistent during a scene.
:
374 cd/m2
SDR Sustained 10% Window
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What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 10% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: Bright objects, persistent during a scene.
:
299 cd/m2
SDR Sustained 25% Window
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What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 25% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: When watching in a bright room.
:
315 cd/m²
SDR Sustained 50% Window
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What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 50% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: When watching in a bright room.
:
316 cd/m2
SDR Sustained 100% Window
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What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 100% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: When watching in a bright room.
:
309 cd/m2
SDR ABL
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What it is: The standard deviation of the SDR sustained brightness, after linearizing for noticeable differences in luminosity
When it matters: Content with large bright areas, such as for PC or video game use, and sports such as hockey
:
0.033

Great SDR peak brightness. While it does fluctuate slightly depending on screen content due to its local dimming, the CHG70 easily gets bright enough to suit most environments. This also helps it handle reflections from lights or windows.

6.5 HDR Peak Brightness
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What it is: How bright the screen can get. Measured with local dimming and with HDR content.
When it matters: HDR content
HDR Real Scene : 355 cd/m²
HDR Peak 2% Window : 575 cd/m2
HDR Peak 10% Window : 577 cd/m2
HDR Peak 25% Window : 360 cd/m2
HDR Peak 50% Window : 371 cd/m2
HDR Peak 100% Window : 371 cd/m2
HDR Sustained 2% Window : 202 cd/m2
HDR Sustained 10% Window : 373 cd/m2
HDR Sustained 25% Window : 358 cd/m2
HDR Sustained 50% Window : 316 cd/m2
HDR Sustained 100% Window : 362 cd/m2
HDR ABL : 0.039

Average HDR peak brightness. Unlike most monitors, it does support the feature, however, it doesn't get any brighter than when an SDR signal is input. It isn't bad, but it doesn't get bright enough to define specular highlights properly and give a very significant HDR effect.

5.0 Horizontal Viewing Angle
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What it is: Color accuracy when viewed from the side.
Samsung CHG70 Horizontal Color Shift Picture
Color Shift from Left
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What it is: Angle where the colors noticeable shift compared to when viewed from directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When sharing your monitor with people on your left
Good value: > 50°
Noticeable difference: 10°
:
33 °
Color Shift from Right
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What it is: Angle where the colors noticeable shift compared to when viewed from directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When sharing your monitor with people on your right
Good value: > 50°
Noticeable difference: 10°
:
30 °
Samsung CHG70 Horizontal Brightness Picture
Brightness from Left
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What it is: Angle where the brightness drops to 50% of the brightness directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When sharing your monitor with people on your left.
Good value: > 50°
Noticeable difference: 10°
:
46 °
Brightness from Right
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What it is: Angle where the brightness drops to 50% of the brightness directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When sharing your monitor with people on your right.
Good value: > 50°
Noticeable difference: 10°
:
45 °
Samsung CHG70 Horizontal Black Level Picture
Black Level from Left
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What it is: Angle where the black level drops to 50% of the black level directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When sharing your monitor with people on your right.
Good value: > 50°
Noticeable difference: 10°
:
16 °
Black Level from Right
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What it is: Angle where the black level drops to 50% of the black level directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When sharing your monitor with people on your right.
Good value: > 50°
Noticeable difference: 10°
:
14 °
Curve Radius : 1800 R

Poor horizontal viewing angle. The CHG70 maintains its colors and brightness decently when viewed from the side, but its black level raises significantly even when only slightly off axis. This causes the picture to look quite flat and dull and makes text difficult to read. Fortunately, its curve helps avoid darkening of the sides from a normal viewing position.

4.8 Vertical Viewing Angle
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What it is: Color accuracy when viewed from the top or bottom.
Samsung CHG70 Vertical Color Shift Picture
Color Shift from Below
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What it is: Angle where the colors noticeable shift compared to when viewed from directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When looking at a monitor from below.
Good value: > 50°
Noticeable difference: 10°
:
25 °
Color Shift from Above
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What it is: Angle where the colors noticeable shift compared to when viewed from directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When looking at a monitor when standing up.
Good value: > 50°
Noticeable difference: 10°
:
24 °
Samsung CHG70 Vertical Brightness Picture
Brightness from Below
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What it is: Angle where the brightness drops to 50% of the brightness directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When looking at a monitor from below.
Good value: > 50°
Noticeable difference: 10°
:
38 °
Brightness from Above
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What it is: Angle where the brightness drops to 50% of the brightness directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When looking at a monitor while standing up.
Good value: > 50°
Noticeable difference: 10°
:
35 °
Samsung CHG70 Vertical Black Level Picture
Black Level from Below
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What it is: Angle where the black level drops to 50% of the black level directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When looking at a monitor from below.
Good value: > 50°
Noticeable difference: 10°
:
7 °
Black Level from Above
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What it is: Angle where the black level drops to 50% of the black level directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When looking at a monitor while standing up.
Good value: > 50°
Noticeable difference: 10°
:
7 °

Poor vertical viewing angle. Much like on a horizontal axis, the CHG70's colors and brightness fair decently when viewed at an angle. Unfortunately, its blacks shift even more rapidly to higher luminance levels. This can cause visible black clouding in corners of the screen even with slight head movements. This is most distracting when viewing letterboxed content.

8.7 Gray Uniformity
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What it is: Evenness of colors onscreen (not just gray).
When it matters: Solid colors. Sports, panning shots.
Score components:
Samsung CHG70 50% Uniformity Picture
50% Std. Dev.
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What it is: Average squared difference of pixels when displaying a mid 50% gray.
When it matters: Solid colors. Sports, panning shots.
Good value: < 2.5%
Noticeable difference: 1%
:
1.656 %
50% DSE
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What it is: High-frequency variance of uniformity. Dark spots on the screen.
When it matters: Solid colors. Sports, panning shots.
Good value: < 0.165%
Noticeable difference: 0.025%
:
0.103 %
Samsung CHG70 5% Uniformity Picture
5% Std. Dev.
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What it is: Average squared difference of pixels when displaying a mid 5% gray.
When it matters: Dark scenes.
Good value: < 1.15%
Noticeable difference: 1%
:
1.141 %
5% DSE
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What it is: High-frequency variance of uniformity. Dark spots on the screen.
When it matters: Dark scenes.
Good value: < 0.116%
:
0.103 %

The Samsung CHG70 has a great overall gray uniformity. Looking at the 50% gray uniformity test picture, the screen looks very uniform with only the top and bottom edges being a bit brighter at some points. Dirty screen effect is not problematic on this monitor.

Looking at the 5% gray test picture, some faint horizontal brighter bands are visible, the one near the top and bottom edge matching the brighter edge of the 50% gray picture. Besides this, not much more is really visible.

4.6 Black Uniformity
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What it is: Evenness of blacks.
When it matters: Dark scenes viewed in a dark room.
Score components:
Samsung CHG70 Native Black Uniformity Picture
Native Std. Dev.
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What it is: Average of the squared difference of the blacks.
When it matters: Dark scenes viewed in a dark room.
Good value: <2%
Noticeable difference: 1%, but keep in mind that it varies a lot by unit, even of the same model; yours likely will not end up exactly like ours.
:
2.8 %
Samsung CHG70 Black Uniformity Picture with Local Dimming
Std. Dev. w/ L.D.
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What it is: Average of the squared difference of the blacks with Local Dimming enabled
When it matters: Dark scenes viewed in a dark room.
Good value: <2%
Noticeable difference: 1%, but keep in mind that it varies a lot by unit, even of the same model; yours likely will not end up exactly like ours.
:
3.443 %

The overall black uniformity of this monitor is poor. When the local dimming is turned off, some backlight bleed is visible in much of the top and bottom part of the screen, leaving only some little portion of the screen free of it.

When the local dimming is turned on, it will turn off the backlight where nothing is displayed, and in the case of our test image, it turns off the backlight at the bottom and the top part. From our test point of view, this affect the uniformity of the screen though, as the middle part of the screen still have some clouding, versus the top and bottom which is now almost black, making the uniformity value much worse than before.

Note that here, we test the overall uniformity of the black, and not the black level.

8.0 Pre Calibration
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What it is: Monitor's color accuracy before a full calibration. The measurements are taken with out of the box 'factory setting'.
When it matters: All video on an uncalibrated TV. This represents most people's use cases.
Score components:
Samsung CHG70 Pre Calibration Picture Samsung CHG70 Pre Gamma Curve Picture Samsung CHG70 Pre Color Picture
Picture Mode
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What it is: The picture mode that was used to do the pre-calibration reading. We usually go for the picture mode that gives us the more control over all the picture quality setting.
:
High-Brightness
Luminance
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What it is: The luminance at which the pre-calibration reading was done. This represents the luminance of the monitor when it is at the factory default settings.
:
433.1 cd/m2
Luminance Settings
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What it is: The luminance settings, often named 'Brightness' on monitors, usually range from 0 to 100.
:
100
Contrast Setting
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What it is: The monitor contrast setting, usually ranging from 0 to 100.
:
75
RGB controls
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What it is: This is the value for each color (red, green, and blue) used in the monitor internal RGB cuts/gains controls. If the monitor does not have an internal RGB cuts/gains controls, then the color temperature setting will be used instead, and the color temperature that gives us the best result will be used.
:
Normal Color Tone
Color Temperature
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What it is: The color temperature is a measure of the color of light. A colder color temperature (7000K) will look bluer and a warmer color temperature (4000K) will look yellower/redder. 6500K is the standard color for PC monitors and also for the sRGB color standard.
When it matters: When you care about color reproduction and accuracy.
Good value: 6500K
Noticeable difference: 400K
:
6540 K
White Balance dE
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What it is: Average inaccuracy of shades of gray.
When it matters: Overall color temperature of all video.
Good value: < 3
Noticeable difference: 1
:
2.59
Color dE
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What it is: Average inaccuracy of colors.
When it matters: All colors.
Good value: < 3
Noticeable difference: 1
:
2.47
Gamma
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What it is: Brightness of shades of gray.
When it matters: Shadows.
Good value: Between 2.1 and 2.3 (our target is 2.2)
Noticeable difference: 0.1
:
2.3

The Samsung CHG70 has a very good 'Out of the box' accuracy. The most accurate measurements were done on the 'High-Brightness' 'Picture mode', with the 'Normal' 'Color tone'. Both the color dE and the white balance dE were under 3.0, which is very good for most people, except professional who might notice some inaccuracies. The color temperature was almost right on the 6500k target and looking at the CIE diagram, we see that the greens and reds are oversaturated a bit in the sRGB standard, but almost spot on when set to P3.

The gamma was a bit higher than our 2.2 target and looking at the gamma curve, we see that a peak in the lower and higher IRE value. The peak in the lower IRE values (dark) could cause some black crush in some multimedia content.

Most of the other pictures modes did offer similar accuracy to the 'High-Brightness when set on the normal color tone, only the 'Cinema' 'Picture Mode' had a worse accuracy out of the lot (white balance dE of 8.06 and color de of 6.96)

9.2 Post Calibration
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What it is: Monitor's color accuracy after a full calibration with a spectrophotometer.
When it matters: All graphics and video content on a monitor that has been professionally calibrated.
Score components:
Samsung CHG70 Post Calibration Picture Samsung CHG70 Post Gamma Curve Picture Samsung CHG70 Post Color Picture
Picture Mode
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What it is: The picture mode that was used to do the calibration reading. We usually go for the picture mode that gives us the more control over all the picture quality setting.
:
Custom
Luminance
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What it is: The luminance at which the calibration was executed. We aim for a luminance level of 100 cd/m².
:
103.1 cd/m2
Luminance Settings
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What it is: The luminance settings, often named 'Brightness' on monitors, usually range from 0 to 100.
:
8
Contrast Setting
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What it is: The monitor contrast setting, usually ranging from 0 to 100.
:
75
RGB controls
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What it is: This is the value for each color (red, green, and blue) used in the monitor internal RGB cuts/gains controls. If the monitor does not have an internal RGB cuts/gains controls, then the color temperature setting will be used instead, and the color temperature that gives us the best result will be used.
:
43-50-51
Color Temperature
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What it is: The color temperature is a measure of the color of light. A colder color temperature (7000K) will look bluer and a warmer color temperature (4000K) will look yellower/redder. 6500K is the standard color for PC monitors and also for the sRGB color standard.
When it matters: When you care about color reproduction and accuracy.
Good value: 6500K
Noticeable difference: 400K
:
6311 K
White Balance dE
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What it is: Average inaccuracy of shades of gray.
When it matters: Overall color temperature of all videos.
Good value: < 3
Noticeable difference: 1
:
0.91
Color dE
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What it is: Average inaccuracy of colors.
When it matters: All colors.
Good value: < 3
Noticeable difference: 1
:
1.27
Gamma
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What it is: Brightness of shades of gray.
When it matters: Shadows.
Good value: Between 2.1 and 2.3 (our target is 2.2)
Noticeable difference: 0.1
:
2.18

After calibration, the accuracy of the CHG70 is excellent. The calibration was done with the 'Custom' 'Picture Mode' and with the 'Custom' 'Color Tone, as we needed to change the RGB values. The gamma issues were corrected and if you look at both dE, both the white balance dE and color dE were brought down by almost half, which is great result.

You can download our ICC profile calibration here.

8.8 SDR Color Gamut
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What it is: The palette of colors the monitor can display
When it matters: General content consumption or production
Score components:
Samsung CHG70 Color Gamut s.RGB Picture
s.RGB xy
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What it is: Coverage of the s.RGB colorspace on CIE 1931 xy.
When it matters: Almost all content. Includes websites, standard windows environment and SDR movies
Good value: > 95%
Noticeable difference: 5%
:
94.9 %
Samsung CHG70 Color Gamut ARGB Picture
Adobe RGB xy
Show Help
What it is: Coverage of the Adobe RGB colorspace on CIE 1931 xy.
When it matters: Professional photography.
Good value: > 90%
Noticeable difference: 5%
:
80.9 %

Good SDR color gamut, the CHG70 has no issue covering most of the essential s.RGB color gamut. While it is a wide gamut monitor, it does not feature an Adobe RGB setting, so those looking for support the more professionally oriented color space might be disappointed.

9.1 SDR Color Volume
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What it is: How much of the SDR color spaces the monitor can reproduce
When it matters: General usage and SDR media creation
Score components:
Samsung CHG70 s.RGB Color Volume ITP picture
s.RGB in ICtCp
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What it is: How much of the s.RGB colorspace a monitor can display at different luminosity levels
When it matters: Most content, including web, SDR video games, and SDR media creation
:
96.6 %
Samsung CHG70 Adobe RGB Color Volume ITP Picture
Adobe RGB in ICtCp
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What it is: How much of the Adobe RGB colorspace a monitor can display at different luminosity levels, normalized to the monitor's peak brightness.
When it matters: Professional media creation
:
85.8 %

The Samsung CHG70 has an excellent SDR color volume. A combination of good contrast and larger than average color gamut helps it cover the s.RGB volume almost entirely. Even if it doesn't come packaged with native Adobe RGB calibration, it can still reproduce that color volume better than average.

7.9 HDR Color Gamut
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What it is: The monitor's ability to reproduce HDR color spaces
When it matters: HDR content consumption or media creation
Score components:
Wide Color Gamut
Show Help
What it is: Whether the monitor can support wider color gamuts
When it matters: HDR content and media creation
:
Yes
Samsung CHG70 Color Gamut DCI-P3 Picture
DCI P3 xy
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What it is: Coverage of the DCI P3 colorspace on CIE 1931 xy
When it matters: When consuming or producing HDR content.
:
90.2 %
Samsung CHG70 Color Gamut Rec.2020 Picture
Rec. 2020 xy
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What it is: Coverage of the Rec.2020 colorspace on CIE 1931 xy.
When it matters: When consuming or producing HDR content.
Good value: > 90%
Noticeable difference: 5%
:
67.9 %

Very good wide color gamut, better than most HDR TVs. Saturated colors in HDR content will be well represented. The monitor's color accuracy is decent but could be improved.

7.2 HDR Color Volume
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What it is: How much of the HDR color spaces a monitor can display at different luminosity levels.
When it matters: HDR content consumption and production. Includes streaming services, UHD Blu-rays and HDR games.
Score components:
Samsung CHG70 P3 Color Volume ITP Picture
DCI-P3 in ICtCp
Show Help
What it is: How much of the DCI-P3 colorspace a monitor can display at different luminosity levels, normalized to the monitor's peak brightness output.
When it matters: HDR content.
Good value: 80%
Noticeable difference: 5%
:
79.8 %
Samsung CHG70 2020 Color Volume ITP Picture
Rec. 2020 in ICtCp
Show Help
What it is: How much of the Rec. 2020 colorspace a monitor can display at different luminosity levels, normalized to the monitor's peak brightness output.
When it matters: HDR content.
Good value: 80 %
Noticeable difference: 5 %
:
64.9 %

Decent color volume. The monitor's high contrast ratio and local dimming help it show its wide color gamut at a large range of brightness levels. Unfortunately, the monitor's tone mapping makes it narrow its DCI P3 color gamut at high brightness levels, which is odd because it should be able to show those saturated colors at high brightness.

10 Image Retention
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What it is: How much a static image is retained on a monitor screen after a certain amount of time.
When it matters: When working or playing video games on your PC monitor.
Samsung CHG70 Image Retention Picture
IR after 0 min recovery
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What it is: Image retention measured right after the static image exposure, without recovery time.
When it matters: When changing use or right after changing the type of on screen content (i.e. stopping playing video game to watch a movie).
Good value: 0 is perfect.
Noticeable difference: 0.015%
:
0 %
IR after 2 min recovery
Show Help
What it is: Image retention measured after a recovery time of 2 minutes.
When it matters: When changing use or right after changing the type of on screen content (i.e. stopping playing video game to watch a movie).
Good value: 0 is perfect
Noticeable difference: 0.015%
:
0 %
IR after 4 min recovery
Show Help
What it is: Image retention measured after a recovery time of 4 minutes.
When it matters: When changing use or right after changing the type of on screen content (i.e. stopping playing video game to watch a movie).
Good value: 0 is perfect.
Noticeable difference: 0.015%
:
0 %
IR after 6 min recovery
Show Help
What it is: Image retention measured after a recovery time of 6 minutes.
When it matters: When changing use or right after changing the type of on screen content (i.e. stopping playing video game to watch a movie).
Good value: 0 is perfect.
Noticeable difference: 0.015%
:
0 %
IR after 8 min recovery
Show Help
What it is: Image retention measured after a recovery time of 8 minutes.
When it matters: When changing use or right after changing the type of on screen content (i.e. stopping playing video game to watch a movie).
Good value: 0 is perfect.
Noticeable difference: 0.015%
:
0 %
IR after 10 min recovery
Show Help
What it is: Image retention measured after a recovery time of 10 minutes.
When it matters: When changing use or right after changing the type of on screen content (i.e. stopping playing video game to watch a movie).
Good value: 0 is perfect.
Noticeable difference: 0.015%
:
0 %

The Samsung CHG70 is free of image retention, which is normally the case with monitors that use a VA panel in their construction.

8.0 Reflections
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What it is: How much light is reflected by the TV.
When it matters: Bright rooms.
Score components: Subjectively assigned
Samsung CHG70 Average room Samsung CHG70 Average room off picture Samsung CHG70 Bright room off picture

The reflection handling of this Samsung monitor is great. The curve is advantageous in most situations, smearing reflections across the screen and reducing their intensity. The semi-matte finish also helps to diffuse reflections on the screen. Overall, it is a great result for most rooms.

9.5 Gradient
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What it is: How finely levels of color can be displayed.
When it matters: Details in shadows, sky and skin tones. Matters more for HDR content.
Score components: Subjectively assigned
Samsung CHG70 Gradient Picture
Color Depth
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What it is: Number of bits per pixel to represent a specific color. Note: we consider 8-bit with dithering to be equivalent to 10-bit, as long as the 10-bit gradient looks smooth.
When it matters: HDR content like HDR video games or HDR UHD movies. Won't matter for regular Blu-ray movies, SDR video game or desktop environment content displayed from a Windows PC. Those are limited to 8-bit color.
Good value: 10-bit.
Noticeable difference: 1 bit.
:
10 Bit

The Samsung CHG70 does an amazing job of displaying our gradient test image. Only some minimal color banding was noted in the darker shades of color. Besides that, not many other issues could be noted, and no 8-bit banding was visible, as this monitor as a 10-bit color depth.

10 Color Bleed
Show Help
What it is: How much the color from one area of the screen affects the color in another area of the screen.
When it matters: All usages, but especially media creation.
Score components:
Samsung CHG70 Color bleed horizontal
Pixel row error
Show Help
What it is: The amount of bleed that appears across the screen horizontally.
When it matters: General usage of a PC monitor, can appear when browsing the web or with media creation like graphics.
Good value: <0.2%
Noticeable difference: 0.1%
:
0.000 %
Samsung CHG70 Color bleed vertical
Pixel column error
Show Help
What it is: Amount of color bleeding that appears across the screen vertically.
When it matters: Most uses of a PC monitor. Can appear while browsing the web or when editing images or graphics.
Good value: <0.2%
Noticeable difference: 0.1%
:
0.000 %

The C27HG70 is thankfully completely free of color bleed. While some very faint bleeding is visible in our vertical picture, its appearance is exacerbated by the long exposure used by the camera and isn't perceivable with normal use.

9.1

Motion

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Score components:

Motion looks excellent on the Samsung CHG70. This monitor's got it all: a flicker-free backlight, fast response time, high native refresh rate, AMD FreeSync 2 variable refresh rate technology, and optional Black Frame Insertion modes. While many monitors have a faster response time, very few can beat the CHG70's complete package.

9.0 Motion Blur
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What it is: The performance of the pixel response time. Poor response time causes trails to follow moving objects. Response time is one of a few sources of motion blur.
When it matters: When there's fast movement on screen, such as during video games and sports.
Score components:
Samsung CHG70 Motion Blur Picture Samsung CHG70 Response Time Chart
80% Response Time
Show Help
What it is: How quickly pixels can reach 80% of a full transition from one color to another.
When it matters: When there's fast movement on screen, such as during video games and sports.
Good value: < 8 ms
Noticeable difference: 4 ms
:
4.5 ms
100% Response Time
Show Help
What it is: How quickly pixels can fully transition from one color to another.
When it matters: When there's fast movement on screen, such as during video games and sports.
Good value: < 20 ms
Noticeable difference: 10 ms
:
11.3 ms
Best Overdrive Setting
Show Help
What it is: If the monitor has adjustable pixel overdrive settings, which one produces the best response time with minimal overshoot.
When it matters: When adjusting the monitor's settings to get the least possible motion blur.
:
Standard

Great motion blur, good enough for watching fast moving content. Most of the blur in the photo is due to persistence; only a short ghosting trail can be seen following the moving photo and no other smearing is visible. However the monitor's 0-20% transition takes far longer than all the others, so some ghosting may be visible in very dark parts of images.

Surprisingly, the monitor's overdrive can't be adjusted; the other 'Response Time' setting modes only activate BFI, as explained in the Image Flicker section. Fortunately, the monitor's default overdrive is very good, producing fast transitions without adding much overshoot.

9.2 Image Flicker
Show Help
What it is: Luminosity pattern when displaying images
When it matters: Nearly all the time during PC monitor use, but especially during fast movement such as video games
Samsung CHG70 Backlight Picture
Flicker-free : Yes
PWM Dimming Frequency
Show Help
What it is: Flickering pattern at different luminosities.
When it matters: For people sensitive to flickering.
Good value: N/A or high frequencies (> 300 Hz). Frequencies that are multiples of 60Hz are better.
:
0 Hz
Black Frame Insertion (BFI)
Show Help
What it is: Option to turn screen black between frames
When it matters: Reduces eye tracking blur in motion
Good value: Yes
:
Yes
Samsung CHG70 BFI Picture Samsung CHG70 BFI Frequency Picture
BFI Maximum Frequency
Show Help
What it is: Highest possible frequency of flickering pattern
When it matters: Reduces eye-tracking blur in motion
Good value: Matches the native refresh rate
Noticeable difference: 20 Hz
:
144 Hz
BFI Minimum Frequency
Show Help
What it is: Lowest possible frequency of flickering pattern
When it matters: Reduces eye-tracking blur in motion
Good value: 60 Hz
Noticeable difference: 20 Hz
:
100 Hz

The C27HG70's backlight has a strange multi-thousand Hz wobble, but can be considered flicker free as far as the human eye is concerned. The 32" model (C32HG70) on the other hand has flicker in its backlight according to TFT Central's measurements, which is not good.

The C27HG70 has two BFI modes in its 'Response Time' setting: 'Faster' and 'Fastest'; which intentionally add flicker to clear up motion when the framerate matches the flicker rate exactly. We recommend the 'Fastest' setting if you want BFI, as 'Fastest' has a narrower pulse spread than 'Faster'. This monitor's BFI has a few limitations, however: when it's active the brightness can't be changed; BFI can't be activated when the monitor is in HDR mode; and the BFI frequency must be manually changed in the monitor's OSD by changing the 'Game -> Refresh Rate' setting.

9.2 Refresh Rate
Show Help
What it is: How frequently the monitor can refresh and show new frames, and whether it can vary its refresh rate in real time using technologies like G-sync and FreeSync.
When it matters: Mostly for gaming, but does provide a little better motion during normal usage.
Native
Show Help
What it is: The frequency at which the monitor is capable of displaying images every second
When it matters: General usage, but better results are most important for gaming
Good value: >100 Hz
Noticeable difference: 15 Hz
:
144 Hz
Factory Overclock
Show Help
What it is: The frequency at which the monitor's can be boosted to using its internal menu.
When it matters: Gaming and other usages where high frame rate content is consumed.
Good value: >100
Noticeable difference: 15
:
N/A
Variable Refresh Rate
Show Help
What it is: Feature that allows the monitor to synchronize its refresh rate with the input device's output and reduces stuttering and screen tearing.
When it matters: Almost every usage, but is most noticeable in gaming where constant fluctuation in framerate cause distracting artifacts.
:
FreeSync
VRR Maximum
Show Help
What it is: The maximum frequency covered by the Variable Refresh Rate feature of the monitor.
When it matters: Any time the VRR feature is enabled.
Good value: Matches Refresh rate
Noticeable difference: 10 Hz
:
144 Hz
VRR Minimum
Show Help
What it is: The lowest frequency covered by the monitor's Variable Refresh Rate feature.
When it matters: When using the VRR feature of the monitor at lower frame rates.
Good value: 30 Hz
:
< 20 Hz
VRR Maximum With OC
Show Help
What it is: The maximum frequency covered by the Variable Refresh Rate feature when the monitor's overclocking feature is used.
When it matters: When both the overclocking and VRR features are used.
Good value: Matching the overclocked refresh rate.
Noticeable difference: 10 hz
:
N/A
VRR Supported Connectors : DisplayPort, HDMI

High native refresh rate, with a great FreeSync range. The CHG70 is AMD FreeSync 2 certified, and as such has a wide enough FreeSync range to support Low Framerate Compensation (LFC), which effectively allows its range to extend below 20 Hz by sending double or triple frames when the framerate drops below the monitor's 48 Hz lowest native refresh rate.

Over HDMI the maximum refresh rate without FreeSync is 144 Hz, but with FreeSync it unfortunately drops to 100 Hz. Luckily FreeSync over HDMI on this monitor also supports LFC, extending its range below 20 Hz.

The monitor's OSD lists two FreeSync modes: 'Standard Engine' and 'Ultimate Engine'. The 'Ultimate Engine' had the widest FreeSync range and no adverse effects, so we only recommend the 'Standard Engine' if your game has problems with the 'Ultimate Engine'.

9.1

Inputs

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Score components:

The C27HG70 has large 27" size and a sharp 1440p resolution, which will please most anyone. It also has excellent low input lag in most cases, although its 60 Hz input lag is quite high.

9.5 Input Lag
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What it is: Delay between input and onscreen reaction.
When it matters: General usage of the mouse and gaming.
Native Resolution
Show Help
What it is: Lowest input lag possible at the center of the screen, when the monitor is displaying its native resolution at its native refresh rate.
When it matters: General usage and while playing video games.
Good value: < 15 ms
Noticeable difference: 5 ms
:
4.4 ms
Non-Native Resolution
Show Help
What it is:

Lowest input lag possible at the center of the screen, when the monitor is displaying an alternative resolution at its native refresh rate. The non-native resolution tested depends on the native resolution of the monitor, following this pattern unless otherwise specified in the Input Lag text:

Native Resolution Non-Native Resolution Tested
4k UHD QHD
QHD FHD
FHD 1600x900
3440x1440 2560x1080
2560x1080 1920x1080
When it matters: General usage as well as gaming.
Good value: < 15 ms
Noticeable difference: 5 ms
:
N/A
Native Resolution @ 60 Hz
Show Help
What it is: Lowest input lag possible at the center of the screen, when the monitor is displaying its native resolution at a refresh rate of 60 Hz.
When it matters: General usage as well as gaming.
Good value: < 15 ms
Noticeable difference: 5 ms
:
9.3 ms
Variable Refresh Rate
Show Help
What it is: Lowest input lag possible at the center of the screen, when the monitor is using its Variable Refresh Rate feature at its native resolution.
When it matters: General usage as well as gaming.
Good value: < 15 ms
Noticeable difference: 5 ms
:
4.2 ms
HDR
Show Help
What it is: Lowest input lag possible at the center of the screen, when the monitor is displaying an HDR signal at its native resolution and refresh rate.
When it matters: General usage as well as gaming.
Good value: < 15 ms
Noticeable difference: 5 ms
:
4.3 ms
Black Frame Insertion (BFI)
Show Help
What it is: Lowest input lag possible at the center of the screen, when BFI is enabled and the monitor is displaying a signal at the highest supported BFI refresh rate.
When it matters: General usage as well as gaming.
Good value: < 15 ms
Noticeable difference: 5 ms
:
6.4 ms

BFI frequency tested: 144 Hz

Excellent low input lag. The input lag remains low when the monitor is in FreeSync or HDR mode, which is good. Unfortunately, the 60 Hz input lag is oddly high and strangely inconsistent, varying from ~44 to ~40 on a single test run. Also no non-native resolutions supported the monitor's native 144 Hz refresh rate and so will have higher input lag, which is not great.

Update 12/11/2017: When the monitor's 'Game -> Refresh Rate' setting is set to 60 Hz, the 'Low Input Lag' setting is no longer greyed out and the 60 Hz input lag becomes consistently low. The test result has been updated. When using the monitor at 60 Hz without FreeSync, such as when using an Xbox One X, we recommend setting 'Game -> Refresh Rate' to 60 Hz and 'Low Input Lag' to 'On'.

8.4 Resolution and Size
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What it is: The number of pixels the monitor can display, and the surface area of its screen.
When it matters: All usages, but especially for office and media editing.
Score components:
Native Resolution : QHD, 2560 x 1440
Aspect Ratio : 16:9
Megapixels : 3.7 MP
Pixel Density : 109 PPI
Screen Diagonal : 26.9 inches
Screen Area : 310 sq inches

The C27HG70 has a sharp 1440p resolution and a large 27" size, which are great for almost all usages. The C32HG70 has the same 1440p resolution but a larger 32" size, which is better but also more expensive.

Main Inputs
Other Inputs

All the inputs are on the back.

Total Inputs
DisplayPort : 1 (DP 1.4)
Mini DisplayPort : No
HDMI : 2 (HDMI 2.0)
DVI : No
VGA : No
DisplayPort Out : No
USB : 2 (USB 3.0)
USB C : No
Analog Audio Out 3.5mm : 1
Microphone In 3.5mm : 1
Digital Optical Audio Out : No
Analog Audio Out RCA : No

Features

The Samsung CHG70 has a well-organized OSD that's easy to navigate with the joystick control on the back of the monitor. The OSD has most of the standard monitor features such as adjustable image and color settings, as well as a 'USB Super Charging' mode for devices that support quick-charge and an 'Eye Saver Mode' for night time viewing. The monitor's firmware can also be upgraded from a USB drive inserted in USB port 1, which is useful because early firmware versions don't support the monitor's full FreeSync range.

Additional Features
Show Help
What it is: Additional features found on the monitor
Score components:
Speakers
Show Help
What it is: Whether or not the monitor features standalone speakers.
When it matters: When using your computer without headphones or a dedicated pair of speakers.
:
No
HDR10 : Yes

The monitor has a 'USB Super Charging' mode that increases the voltage supplied to USB port 2 for devices that support quick charging. The monitor also has an 'Eye Saver Mode' for night time viewing, which adds an orange filter over the screen to reduce blue light. This mode does severely hurt the contrast ratio however, so we don't recommend it unless the screen is causing discomfort at night.

On-Screen Display (OSD)
Controls
Samsung CHG70 Controls picture

The monitor's OSD is controlled by a joystick on the back of the monitor, which doubles as the power button. The joystick is actually a very intuitive way to navigate the OSD, better than the (up/down/back/select) button scheme used by most monitors.

There are also three buttons on the underside of the bottom right corner (faintly visible in the photo) which can switch between saved settings modes called 'Game Setting 1/2/3'. Users can save different settings configurations to these modes, and switch between them on the fly.

In The Box
Samsung CHG70 In The Box picture

  • Manual and drivers
  • Calibration report
  • USB cable
  • Displayport cable
  • HDMI cable
  • Power brick and cable
There is also a VESA mount adapter included, pictured here.

Conclusion
SEE PRICE
Amazon.com

7.8Mixed Usage
Show Help
Score components:
  • 30% Office
  • 30% Multimedia
  • 25% Gaming
  • 10% Media Creation
  • 5% HDR Gaming
Very good monitor for a mixed usage. The Samsung CHG70's better than average picture quality and great gaming performance make it a great choice for users looking to get a high performing monitor for home use. Its native support for HDR and wide color gamuts great too. Unfortunately, its viewing angles are quite narrow, making it less useful in more communal environments.
Decent monitor for use in an office. The Samsung CHG70's high brightness and good handling of reflections means it won't have any difficulty dealing with the harsh lighting of most offices. Its larger size and high resolution are also quite useful for productivity, but its slightly bulky space and narrow viewing angles makes it less practical for sharing with neighboring co-workers.
The CHG70 is a great gaming monitor. It has very little input lag, and its high refresh rate, image flicker and relatively quick response times make for very sharp and fluid motion. Its HDMI 2.0 input makes it a particularly good choice for those that also want to use their monitor with an Xbox One X.
Good monitor for enjoying a variety of media. The CHG70's VA-type LCD TV gives it a higher than average contrast ratio which is the most important aspect of picture quality. It also covers the larger DCI-P3 color gamut almost entirely, which when combined with its HDR support gives it a very vibrant picture. It isn't perfect, however. It's not very uniform with some visible clouding, and its local dimming feature is quite rudimentary.
Good monitor for media creation tasks. The Samsung CHG70's support the DCI-P3 color gamut means it is quite up to date with currently used colorspaces and allows for the production of HDR content. Its relatively high resolution is also quite useful for efficient virtual workspaces. Unfortunately, though, its uneven blacks might bother some, and its lack of support for the Adobe RGB color space means it is more oriented towards video content.
Decent HDR Gaming monitor. While the Samsung CHG70's very wide color gamut helps make HDR game look very vibrant and saturated, its average brightness for HDR and basic local dimming feature limit the impact of displaying HDR content. It does, however, keep a very low input lag when connected to an HDR source which is important for gaming.
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Questions & Answers

2 ANSWERED QUESTIONS
1
I have the older cfg70 which uses a similar VA panel, do you think your calibration settings would achieve good results on that monitor as well?
Unfortunately, it is difficult for us to recommend these settings for another model, even if it is quite similar. Even across different units of the same model, we usually do not recommend using our specific ICC profile, as the adjustments made by the corrective profile might not be applicable to your own monitor.
0
Hi rtings team, first off thank you so much for doing this review. I was interested in buying this monitor and using my graphics card to send it a 21:9 2560x1080p image yet you say:
"Also no non-native resolutions supported the monitor's native 144 Hz refresh rate and so will have higher input lag, which is not great."
Does this apply to sending the monitor a custom resolution using nVidia Control Panel > Resolution > Custom (a method for tricking the monitor into letterboxing) or was caused from some resolution setting using the monitors menu?
Most custom resolutions should be able to do 144 Hz, it's more a limitation with the monitor's EDID, which custom resolutions ignore. 2560x1080 un-letterboxed output from the GPU (2560x1080 detected on the monitor) ran at 144 Hz no problem. If the GPU sends 2560x1080 letterboxed then it's actually sending 2560x1440 to the monitor (the monitor detects 2560x1440), so it acts like the native resolution. You can letterbox a few ways, one with a custom resolution with 'Automatic' timings so the 'Active Pixels' are 2560x1440, like you said, or by setting the GPU's upscaling mode to 'No Scaling', then forcing GPU upscaling rather than monitor upscaling.
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