The Samsung CHG70 is a very good VA-type 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. The CHG70 is available in two sizes: the 27" size (Samsung C27HG70) and the 32" size (Samsung C32HG70); we've reviewed the 27" model.
- High contrast gives good picture quality
- High refresh rate for gaming
- Wide color gamut and HDR support
- Cloudy blacks lack uniformity
- Narrow viewing angles
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 in 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.
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.
5.7" (14.4 cm)
-15° to 15°
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.
The rear of the Samsung C27HG70 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.
The borders of the Samsung C27HG70 look sleek and are thin. The sides are made of a silver colored plastic, which looks good.
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).
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 Samsung C27HG70 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.
2925 : 1
Contrast with local dimming
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.
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.
SDR Real Scene
SDR Peak 2% Window
SDR Peak 10% Window
SDR Peak 25% Window
SDR Peak 50% Window
SDR Peak 100% Window
SDR Sustained 2% Window
SDR Sustained 10% Window
SDR Sustained 25% Window
SDR Sustained 50% Window
SDR Sustained 100% Window
Great SDR peak brightness. While it does fluctuate slightly depending on screen content due to its local dimming, the Samsung C27HG70 easily gets bright enough to suit most environments. This also helps it handle reflections from lights or windows.
HDR Real Scene
HDR Peak 2% Window
HDR Peak 10% Window
HDR Peak 25% Window
HDR Peak 50% Window
HDR Peak 100% Window
HDR Sustained 2% Window
HDR Sustained 10% Window
HDR Sustained 25% Window
HDR Sustained 50% Window
HDR Sustained 100% Window
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.
Horizontal Viewing Angle
Color Shift from Left
Color Shift from Right
Brightness from Left
Brightness from Right
Black Level from Left
Black Level from Right
Poor horizontal viewing angle. The Samsung C27HG70 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.
Vertical Viewing Angle
Color Shift from Below
Color Shift from Above
Brightness from Below
Brightness from Above
Black Level from Below
Black Level from Above
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.
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.
Std. Dev. w/ L.D.
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.
Normal Color Tone
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)
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.
Good SDR color gamut, the Samsung 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.
Adobe RGB in ICtCp
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.
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.
Rec. 2020 in ICtCp
Decent color volume. The Samsung C27HG70 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.
IR after 0 min recovery
IR after 2 min recovery
IR after 4 min recovery
IR after 6 min recovery
IR after 8 min recovery
IR after 10 min recovery
The Samsung CHG70 is free of image retention, which is normally the case with monitors that use a VA panel in their construction.
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.
Pixel row error
Pixel column error
The Samsung 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.
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.
80% Response Time
100% Response Time
Best Overdrive Setting
Excellent motion blur, which is good for watching fast moving content as only a very short trail will be seen behind objects. Most of the blur in the photo is due to persistence which is visible when your eyes move over the static image between frames. 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.
PWM Dimming Frequency
Black Frame Insertion (BFI)
BFI Maximum Frequency
BFI Minimum Frequency
The C27HG70's backlight has a strange high frequency wobble, but can be considered flicker free as far as the human eye is concerned so images appear smooth. The 32" model (C32HG70) on the other hand has flicker in its backlight according to TFT Central's measurements, which is not good and will produce multiple trailing images.
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. This produces very clear images when playing fast paced games. 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.
Variable Refresh Rate
VRR Maximum With OC
VRR Supported Connectors
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'.
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.
Native Resolution @ 60 Hz
Variable Refresh Rate
Black Frame Insertion (BFI)
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'.
QHD, 2560 x 1440
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.
All the inputs are on the back.
Analog Audio Out 3.5mm
Digital Optical Audio Out
Analog Audio Out RCA
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.
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.
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.
- 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
Differences between Sizes and Variants
The CHG70 we bought is the 27" model (Samsung C27HG70). It is also available in a 32" size (Samsung C32HG70). We expect this 32" model to have almost the same performance, but with a flickering backlight instead of the effectively flicker-free performance of the 27" model. If someone's CHG70 doesn't correspond to our review, let us know and we will update the review. Note that some tests such as the gray uniformity may vary between individual units.
Compared to other Monitors
The CHG70 is a very good HDR gaming monitor with a high refresh rate and better than average picture quality.
Acer Predator XB271HU
The Acer Predator XB271HU is an IPS gaming monitor with excellent motion performance but worse image quality. It doesn't support HDR and blacks appear gray when viewed in a dark room, but the image remains accurate when viewed at an angle. If you want the most accurate image from any angle, then the Acer Predator XB271HU is a better choice, but otherwise, go with the Samsung CHG70.
The LG 29UM69G-B is an ultrawide monitor with worse performance and no HDR. However, it is more affordable. The slower 75Hz refresh rate makes it feel a bit less responsive and also limits the FreeSync range. It also has worse picture quality due to the lower native contrast ratio and worse uniformity. If you're on a budget, then the LG 29UM69G-B may be a good choice, but the Samsung CHG70 is better overall and especially for HDR gaming.
The Dell S2716DG is a 144Hz gaming monitor with a TN panel. It has worse picture quality as blacks appear gray in a dark room and when viewed from in front the top and bottom of the screen shift colors, but motion handling is excellent due to the very fast response time and G-Sync support. If all you care about is the fastest motion at 144Hz then go with the Dell, but otherwise, go with the Samsung CHG70 for better picture quality and HDR support.
The LG 27UD68P-B is an IPS monitor with decent picture quality and a very high pixel density 4k screen. This provides an extremely sharp image, but the picture quality isn't as good as the Samsung CHG70 as it doesn't support HDR and blacks appear gray in a dark room. Motion handling also isn't as good due to the lower refresh rate 60Hz panel and higher input lag. For gaming or HDR the Samsung CHG70 is a better choice, but if you care more about screen space, then go with the LG 27UD68P-B.
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.