Products
LG 27UK650-W
LG UltraFine 4k
Tested using Methodology v1.1
Updated Jun 07, 2024 08:44 PM
SEE PRICE
Amazon.com
Tested using Methodology v1.0
Updated Apr 15, 2024 02:42 PM
SEE PRICE
Amazon.com
Size27"
Pixel Type
IPS
Variable Refresh Rate
FreeSync
Native Resolution3840 x 2160
Max Refresh Rate
60 Hz
Size24"
Pixel Type
IPS
Variable Refresh Rate
No
Native Resolution3840 x 2160
Max Refresh Rate
60 Hz
Our Verdict
LG 27UK650-W
LG UltraFine 4k
The LG 27UK650-W is much better than the LG UltraFine 4k. The 27UK650 has better ergonomics, better reflection handling, a flicker-free backlight, and it supports HDR. The 27UK650 also has better gaming performance, with less input lag and support for FreeSync variable refresh rate technology.
Variants
- 27UK650-W (27")
- UltraFine 4k (23.7")
Check Price
27"
27UK650-W
SEE PRICE
Amazon.com
23.7"
UltraFine 4k
SEE PRICE
Amazon.com
27"
27UK650-W
SEE PRICE
Walmart.com
23.7"
UltraFine 4k
SEE PRICE
BestBuy.com
27"
27UK650-W
SEARCH
B&H
23.7"
UltraFine 4k
SEE PRICE
Walmart.com
27"
27UK650-W
SEARCH
BestBuy.com
23.7"
UltraFine 4k
SEARCH
B&H
27"
27UK650-W
SEARCH
LG.com
23.7"
UltraFine 4k
SEARCH
LG.com
Main Differences for
Mixed Usage
Mixed Usage
Threshold
Mixed Usage
7.9
7.4
Image Flicker
10
5.7
Full Comparison
Design
Style
Design Picture
Size
27"
24"
Curved
No
No
Curve Radius
Not Curved
N/A
Weight (without stand)
9.9 lbs (4.5 kg)
11.5 lbs (5.2 kg)
Weight (with stand)
13.4 lbs (6.1 kg)
15.4 lbs (7.0 kg)
Stand
Stand Picture
Width
17.9" (45.5 cm)
7.7" (19.6 cm)
Depth
9.1" (23.1 cm)
9.1" (23.1 cm)
Ergonomics
5.9
4.7
Ergonomics Picture
Height Adjustment
4.3" (10.9 cm)
4.3" (10.9 cm)
Switch Portrait/Landscape
Yes, Clockwise
No
Swivel Range
No swivel
N/A
Tilt Range
-17.5° to 2.5°
-25° to 5°
Back
Back Picture
Wall Mount
VESA 100x100
VESA 100x100
Borders
Borders Picture
Borders
0.3" (0.8 cm)
0.7" (1.8 cm)
Thickness
Thickness Picture
Thickness (with stand)
5.6" (14.2 cm)
5.7" (14.5 cm)
Thickness (without stand)
1.7" (4.3 cm)
2.0" (5.1 cm)
Build Quality
6.5
7.5
Build Quality Picture
Picture Quality
Contrast
6.3
6.6
Checkerboard Picture
LCD Type
IPS
IPS
Native Contrast
1,196 : 1
1,445 : 1
Contrast With Local Dimming
N/A
N/A
Local Dimming
0.0
0.0
Local Dimming Video
Local Dimming Video
Local Dimming
No
No
Backlight
Direct
Edge
SDR Peak Brightness
8.0
8.6
SDR Real Scene
352 cd/m²
554 cd/m²
SDR Peak 2% Window
351 cd/m²
563 cd/m²
SDR Peak 10% Window
352 cd/m²
563 cd/m²
SDR Peak 25% Window
352 cd/m²
563 cd/m²
SDR Peak 50% Window
352 cd/m²
563 cd/m²
SDR Peak 100% Window
351 cd/m²
562 cd/m²
SDR Sustained 2% Window
350 cd/m²
562 cd/m²
SDR Sustained 10% Window
351 cd/m²
562 cd/m²
SDR Sustained 25% Window
351 cd/m²
562 cd/m²
SDR Sustained 50% Window
351 cd/m²
561 cd/m²
SDR Sustained 100% Window
350 cd/m²
561 cd/m²
SDR ABL
0.000
0.000
HDR Peak Brightness
6.6
0.0
HDR Real Scene
385 cd/m²
N/A
HDR Peak 2% Window
360 cd/m²
N/A
HDR Peak 10% Window
361 cd/m²
N/A
HDR Peak 25% Window
361 cd/m²
N/A
HDR Peak 50% Window
361 cd/m²
N/A
HDR Peak 100% Window
377 cd/m²
N/A
HDR Sustained 2% Window
357 cd/m²
N/A
HDR Sustained 10% Window
359 cd/m²
N/A
HDR Sustained 25% Window
360 cd/m²
N/A
HDR Sustained 50% Window
360 cd/m²
N/A
HDR Sustained 100% Window
361 cd/m²
N/A
HDR ABL
0.001
N/A
Horizontal Viewing Angle
8.1
7.3
Horizontal Viewing Angle Video
Horizontal Chroma Graph
Color Washout From Left
43°
Color Washout From Right
42°
Horizontal Color Shift Picture
Horizontal Hue Graph
Color Shift From Left
58°
37°
Color Shift From Right
60°
40°
Horizontal Brightness Picture
Horizontal Black Level Picture
Horizontal Lightness Graph
Brightness Loss From Left
48°
45°
Brightness Loss From Right
48°
48°
Black Level Raise From Left
70°
75°
Black Level Raise From Right
70°
75°
Curve Radius
N/A
Gamma Shift From Left
42°
Gamma Shift From Right
41°
Vertical Viewing Angle
7.6
8.3
Vertical Viewing Angle Video
Vertical Chroma Graph
Color Washout From Below
34°
Color Washout From Above
36°
Vertical Color Shift Picture
Vertical Hue Graph
Color Shift From Below
49°
29°
Color Shift From Above
49°
29°
Vertical Brightness Picture
Vertical Black Level Picture
Vertical Lightness Graph
Brightness Loss From Below
34°
37°
Brightness Loss From Above
36°
37°
Black Level Raise From Below
70°
75°
Black Level Raise From Above
70°
75°
Gamma Shift From Below
44°
Gamma Shift From Above
55°
Gray Uniformity
8.7
8.7
50% Uniformity Picture
50% Std. Dev.
3.070%
2.882%
50% DSE
0.109%
0.109%
5% Uniformity Picture
5% Std. Dev.
0.352%
0.396%
5% DSE
0.070%
0.053%
Black Uniformity
6.0
6.3
Native Black Uniformity Picture
Native Std. Dev.
2.002%
1.805%
Black Uniformity Picture With Local Dimming
Std. Dev. w/ L.D.
N/A
N/A
Pre Calibration
8.1
7.7
Pre Calibration Picture
Pre Gamma Curve Picture
Pre Color Picture
Picture Mode
SMPTE-C
N/A
Luminance
227 cd/m²
292 cd/m²
Luminance Settings
50
50
Contrast Setting
70
N/A
RGB Controls
N/A
N/A
Gamma Setting
No Gamma Setting
Color Temperature
6,746 K
6,427 K
White Balance dE
2.17
2.02
Color dE
2.65
3.54
Gamma
2.16
2.24
Post Calibration
9.5
9.7
Post Calibration Picture
Post Gamma Curve Picture
Post Color Picture
Picture Mode
Custom
N/A
Luminance
102 cd/m²
103 cd/m²
Luminance Settings
17
18
Contrast Setting
71
N/A
RGB Controls
46-50-48
N/A
Gamma Setting
Mode 4
Color Temperature
6,435 K
6,455 K
White Balance dE
0.71
0.51
Color dE
0.68
0.29
Gamma
2.18
2.18
SDR Color Gamut
8.8
9.3
Color Gamut sRGB Picture
sRGB xy
98.5%
99.6%
Color Gamut ARGB Picture
Adobe RGB xy
76.4%
84.9%
sRGB Picture Mode
Custom
Adobe RGB Picture Mode
Photo
SDR Color Volume
9.0
9.4
sRGB Color Volume ITP Picture
sRGB In ICtCp
98.9%
97.8%
Adobe RGB Color Volume ITP Picture
Adobe RGB In ICtCp
81.2%
89.5%
sRGB Picture Mode
Custom
Adobe RGB Picture Mode
Photo
HDR Color Gamut
6.9
0.0
Wide Color Gamut
No
N/A
Color Gamut DCI-P3 Picture
DCI P3 xy
78.8%
N/A
Color Gamut Rec.2020 Picture
Rec. 2020 xy
57.5%
N/A
DCI P3 Picture Mode
HDR Standard
Rec. 2020 Picture Mode
HDR Standard
HDR Color Volume
5.9
0.0
P3 Color Volume ITP Picture
DCI-P3 In ICtCp
68.4%
N/A
2020 Color Volume ITP Picture
Rec. 2020 In ICtCp
49.1%
N/A
DCI P3 Picture Mode
HDR Standard
Rec. 2020 Picture Mode
HDR Standard
Image Retention
9.3
5.6
Image Retention Picture
IR After 0 Min Recovery
0.26%
0.37%
IR After 2 Min Recovery
0.00%
0.10%
IR After 4 Min Recovery
0.00%
0.00%
IR After 6 Min Recovery
0.00%
0.00%
IR After 8 Min Recovery
0.00%
0.00%
IR After 10 Min Recovery
0.00%
0.00%
Gradient
9.9
9.9
Gradient Picture
Color Depth
10 Bit
10 Bit
Color Bleed
10
10
Color Bleed Horizontal
Pixel Row Error
0.000%
0.004%
Color Bleed Vertical
Pixel Column Error
0.000%
0.004%
Reflections
7.3
6.0
Average Room
Average Room Off Picture
Bright Room Off Picture
Screen Finish
Matte
Total Reflections
5.6%
Indirect Reflections
3.0%
Calculated Direct Reflections
2.6%
Text Clarity
9.5
ClearType On
Pixel Type
IPS
IPS
ClearType Off
Pixels
Sub-Pixel Layout
RGB
Motion
Response Time @ Max Refresh Rate
8.3
8.5
Motion Blur Picture
Motion Blur Picture
Response Time Chart
Response Time Table
Best Overdrive Setting
Normal
N/A
Rise / Fall Time
6.8 ms
5.6 ms
Total Response Time
13.5 ms
13.9 ms
Overshoot Error
1.3%
Dark Rise / Fall Time
7.4 ms
Dark Total Response Time
14.7 ms
Dark Overshoot Error
2.8%
Response Time @ 60Hz
8.3
Motion Blur Picture
Response Time Table
Best Overdrive Setting
Normal
Rise / Fall Time
6.8 ms
Total Response Time
13.5 ms
Overshoot Error
1.3%
Dark Rise / Fall Time
7.4 ms
Dark Total Response Time
14.7 ms
Dark Overshoot Error
2.8%
Image Flicker
10
5.7
Backlight Picture
Flicker-Free
Yes
No
PWM Dimming Frequency
0 Hz
700 Hz
Black Frame Insertion (BFI)
No BFI
No
BFI Picture
BFI Frequency Picture
BFI Maximum Frequency
N/A
N/A
BFI Minimum Frequency
N/A
N/A
Black Frame Insertion (BFI)
0.0
Black Frame Insertion (BFI)
No BFI
No
BFI Picture
BFI Frequency Picture
BFI Maximum Frequency
N/A
N/A
BFI Minimum Frequency
N/A
N/A
Refresh Rate
7.4
6.7
Variable Refresh Rate
FreeSync
No
Native
60 Hz
Max Refresh Rate
60 Hz
60 Hz
Factory Overclock
N/A
Variable Refresh Rate
Yes
No
FreeSync
Yes
G-SYNC
Partially Compatible
No
VRR Maximum
60 Hz
N/A
VRR Minimum
40 Hz
N/A
VRR Maximum With OC
N/A
VRR Supported Connectors
DisplayPort, HDMI
N/A
Inputs
Input Lag
9.0
8.4
Native Resolution
8.8 ms
13.2 ms
Non-Native Res @ Native Refresh
11.3 ms
Native Resolution @ 60Hz
8.8 ms
13.2 ms
Variable Refresh Rate
9.2 ms
N/A
Variable Refresh Rate @ 60Hz
9.4 ms
10 Bit HDR
8.9 ms
N/A
Black Frame Insertion (BFI)
N/A
N/A
Resolution And Size
9.2
8.9
Native Resolution
3840 x 2160
3840 x 2160
Aspect Ratio
16:9
16:9
Megapixels
8.3 MP
8.3 MP
Pixel Density
164 PPI
186 PPI
Screen Diagonal
26.9"
23.7"
Screen Area
310 in²
240 in²
Inputs
Inputs 1
Inputs 2
Total Inputs
DisplayPort
1 (DP 1.2)
No
Mini DisplayPort
No
No
HDMI
2 (HDMI 2.0)
No
DVI
No
No
VGA
No
No
DisplayPort Out
No
No
USB
No
No
USB C
No
5 (2x Thunderbolt 3 with PD, 3x USB-C)
Analog Audio Out 3.5mm
1
No
Microphone In 3.5mm
No
No
Digital Optical Audio Out
No
No
Analog Audio Out RCA
No
No
Power Supply
External Brick
Internal
Features
Additional Features
RGB Illumination
No
Speakers
No
Yes
HDR10
Yes
No
Multiple Input Display
No
No
On-Screen Display (OSD)
OSD Picture
Controls
Controls Picture
In The Box
In The Box Picture
Check Price
27"
27UK650-W
SEE PRICE
Amazon.com
23.7"
UltraFine 4k
SEE PRICE
Amazon.com
27"
27UK650-W
SEE PRICE
Walmart.com
23.7"
UltraFine 4k
SEE PRICE
BestBuy.com
27"
27UK650-W
SEARCH
B&H
23.7"
UltraFine 4k
SEE PRICE
Walmart.com
27"
27UK650-W
SEARCH
BestBuy.com
23.7"
UltraFine 4k
SEARCH
B&H
27"
27UK650-W
SEARCH
LG.com
23.7"
UltraFine 4k
SEARCH
LG.com
LG 27UK650-W
LG UltraFine 4k
Comments
LG 27UK650-W vs LG UltraFine 4k: Main Discussion
What do you think of these products? Let us know below.
Looking for a personalized buying advice from the RTINGS.com experts? Insiders have direct access to buying advice on our insider forum.