Notice: Your browser is not supported or outdated so some features of the site might not be available.
- Table of Contents
- Top
- Main Differences
- Design
- Picture Quality
- Motion
- Inputs
- Features
- Comments
Dell S2721QS vs LG 27UK650-W
Side-by-Side Comparison
Products
Dell S2721QS
LG 27UK650-W
Tested using Methodology v2.0.1
Updated Apr 24, 2025 05:20 PM
SEE PRICE
Amazon.comTested using Methodology v1.1
Updated May 24, 2024 02:06 PM
SEE PRICE
Amazon.com
Max Refresh Rate60 Hz
Size27"
Pixel TypeIPS
Native Resolution3840 x 2160
Variable Refresh RateYes
Max Refresh Rate60 Hz
Size27"
Pixel TypeIPS
Native Resolution3840 x 2160
Variable Refresh RateFreeSync
Variants
- S2721QS (27")
- 27UK650-W (27")
Our Verdict
Dell S2721QS
LG 27UK650-W
Overall, the Dell S2721QS is a bit better than the LG 27UK650-W. The Dell has better ergonomics, wider viewing angles, and better reflection handling. On the other hand, the LG has better out-of-the-box color accuracy.
Check Price
27"
S2721QS
SEE PRICE
Amazon.com27"
27UK650-W
SEE PRICE
Amazon.com27"
S2721QS
SEE PRICE
BestBuy.com27"
27UK650-W
SEE PRICE
Walmart.com27"
S2721QS
SEARCH
Samsung.com27"
27UK650-W
SEARCH
BestBuy.com27"
S2721QS
SEARCH
Walmart.comMain Differences forMixed Usage
Mixed Usage
Threshold
Mixed Usage
7.9
Full Comparison
Design
Style
Design Picture
Curved
No
No
Curve Radius
Not Curved
Not Curved
Size
27"
27"
Weight (without stand)
10.6 lbs (4.8 kg)
9.9 lbs (4.5 kg)
Weight (with stand)
13.9 lbs (6.3 kg)
13.4 lbs (6.1 kg)
Accelerated Longevity Test
Uniformity Pictures
Longevity Graph
Build Quality
7.5
6.5
Build Quality Picture
Ergonomics
8.8
5.9
Ergonomics Picture
Back Picture
Height Adjustment
4.3" (11.0 cm)
4.3" (10.9 cm)
Min Height To Top Of Panel
15.4" (39.0 cm)
Tilt Range
-20° to 2.5°
-17.5° to 2.5°
Rotate Portrait/Landscape
Yes, Both Ways
Yes, Clockwise
Swivel Range
-30° to 30°
No swivel
Wall Mount
VESA 100x100
VESA 100x100
Stand
Stand Picture
Thickness Picture
Base Width
10.2" (25.9 cm)
17.9" (45.5 cm)
Base Depth
6.9" (17.6 cm)
9.1" (23.1 cm)
Thickness (With Display)
5.1" (13.0 cm)
5.6" (14.2 cm)
Weight (With Display)
13.9 lbs (6.3 kg)
13.4 lbs (6.1 kg)
Display
Display Picture
Size
27"
27"
Housing Width
24.1" (61.2 cm)
Housing Height
14.3" (36.3 cm)
Thickness (Without Stand)
2.0" (5.2 cm)
1.7" (4.3 cm)
Weight (Without Stand)
10.6 lbs (4.8 kg)
9.9 lbs (4.5 kg)
Borders Size (Bezels)
0.3" (0.7 cm)
0.3" (0.8 cm)
Controls
Controls Picture
In The Box
In The Box Picture
Power Supply
Internal
External Brick
Back
Back Picture
Wall Mount
VESA 100x100
VESA 100x100
Borders
Borders Picture
Borders
0.3" (0.7 cm)
0.3" (0.8 cm)
Thickness
Thickness Picture
Thickness (with stand)
5.1" (13.0 cm)
5.6" (14.2 cm)
Thickness (without stand)
2.0" (5.2 cm)
1.7" (4.3 cm)
Picture Quality
Contrast
6.3
6.3
Checkerboard Picture
Native Contrast
1,221 : 1
1,196 : 1
Contrast With Local Dimming
N/A
N/A
Local Dimming
0.0
0.0
Local Dimming Video
Local Dimming
No
No
Backlight
Edge
Direct
SDR Brightness
8.0
8.0
Real Scene
362 cd/m²
352 cd/m²
Peak 2% Window
369 cd/m²
351 cd/m²
Peak 10% Window
370 cd/m²
352 cd/m²
Peak 25% Window
371 cd/m²
352 cd/m²
Peak 50% Window
373 cd/m²
352 cd/m²
Peak 100% Window
374 cd/m²
351 cd/m²
Sustained 2% Window
368 cd/m²
350 cd/m²
Sustained 10% Window
369 cd/m²
351 cd/m²
Sustained 25% Window
371 cd/m²
351 cd/m²
Sustained 50% Window
372 cd/m²
351 cd/m²
Sustained 100% Window
373 cd/m²
350 cd/m²
Automatic Brightness Limiting (ABL)
0.001
0.000
Minimum Brightness
32 cd/m²
HDR Brightness
6.6
6.6
EOTF
VESA DisplayHDR Certification
No Certification
Real Scene
370 cd/m²
385 cd/m²
Peak 2% Window
387 cd/m²
360 cd/m²
Peak 10% Window
386 cd/m²
361 cd/m²
Peak 25% Window
386 cd/m²
361 cd/m²
Peak 50% Window
385 cd/m²
361 cd/m²
Peak 100% Window
385 cd/m²
377 cd/m²
Sustained 2% Window
386 cd/m²
357 cd/m²
Sustained 10% Window
386 cd/m²
359 cd/m²
Sustained 25% Window
385 cd/m²
360 cd/m²
Sustained 50% Window
385 cd/m²
360 cd/m²
Sustained 100% Window
384 cd/m²
361 cd/m²
Automatic Brightness Limiting (ABL)
0.000
0.001
Horizontal Viewing Angle
8.1
8.1
Horizontal Viewing Angle Video
Horizontal Chroma Graph
Color Washout From Left
40°
43°
Color Washout From Right
44°
42°
Horizontal Hue Graph
Color Shift From Left
58°
58°
Color Shift From Right
62°
60°
Horizontal Lightness Graph
Brightness Loss From Left
44°
48°
Brightness Loss From Right
48°
48°
Black Level Raise From Left
70°
70°
Black Level Raise From Right
70°
70°
Gamma Shift From Left
42°
42°
Gamma Shift From Right
44°
41°
Vertical Viewing Angle
8.3
7.6
Vertical Viewing Angle Video
Vertical Chroma Graph
Color Washout From Below
35°
34°
Color Washout From Above
37°
36°
Vertical Hue Graph
Color Shift From Below
61°
49°
Color Shift From Above
62°
49°
Vertical Lightness Graph
Brightness Loss From Below
38°
34°
Brightness Loss From Above
38°
36°
Black Level Raise From Below
70°
70°
Black Level Raise From Above
70°
70°
Gamma Shift From Below
60°
44°
Gamma Shift From Above
67°
55°
Gray Uniformity
7.8
8.7
50% Uniformity Picture
50% Std. Dev.
4.171%
3.070%
50% DSE
0.142%
0.109%
5% Uniformity Picture
5% Std. Dev.
0.352%
5% DSE
0.070%
Black Uniformity
7.1
6.0
Native Black Uniformity Picture
Native Std. Dev.
1.208%
2.002%
Black Uniformity Picture With Local Dimming
Std. Dev. w/ L.D.
N/A
N/A
Color Accuracy (Pre-Calibration)
7.0
8.1
Pre Calibration Picture
Pre Gamma Curve Picture
Pre Color Picture
Picture Mode
Custom Color
SMPTE-C
sRGB Gamut Area xy
116.9%
White Balance dE (Avg.)
3.02
2.17
Color Temperature (Avg.)
6,926 K
6,746 K
Gamma (Avg.)
2.39
2.16
Color dE (Avg.)
3.15
2.65
Contrast Setting
75
70
RGB Settings
100-100-100
N/A
Gamma Setting
No Gamma Setting
No Gamma Setting
Brightness Setting
75
50
Measured Brightness
334 cd/m²
227 cd/m²
Brightness Locked
No
Color Accuracy (Post-Calibration)
9.6
9.5
Post Calibration Picture
Post Gamma Curve Picture
Post Color Picture
Picture Mode
Custom Color
Custom
sRGB Gamut Area xy
102.5%
White Balance dE (Avg.)
0.59
0.71
Color Temperature (Avg.)
6,535 K
6,435 K
Gamma (Avg.)
2.17
2.18
Color dE (Avg.)
0.57
0.68
Contrast Setting
71
71
RGB Settings
100-97-97
46-50-48
Gamma Setting
No Gamma Setting
Mode 4
Brightness Setting
20
17
Measured Brightness
99 cd/m²
102 cd/m²
ICC Profile
SDR Color Gamut
9.4
8.8
sRGB Color Gamut Picture
sRGB Coverage xy
100.0%
98.5%
sRGB Picture Mode
Custom Color
Custom
Adobe RGB Color Gamut Picture
Adobe RGB Coverage xy
80.5%
76.4%
Adobe RGB Picture Mode
Custom Color
Photo
HDR Color Gamut
7.2
6.9
Wide Color Gamut
Yes
No
DCI-P3 Color Gamut Picture
DCI-P3 Coverage xy
85.2%
DCI-P3 Picture Mode
Desktop
HDR Standard
Rec. 2020 Color Gamut Picture
Rec. 2020 Coverage xy
61.1%
57.5%
Rec. 2020 Picture Mode
Desktop
HDR Standard
DCI P3 xy
78.8%
HDR Color Volume
6.7
5.9
DCI-P3 Color Volume ITP Picture
1,000 cd/m² DCI-P3 Coverage ICtCp
56.3%
68.4%
DCI-P3 Picture Mode
Desktop
HDR Standard
Rec. 2020 Color Volume ITP Picture
10,000 cd/m² Rec. 2020 Coverage ICtCp
24.1%
49.1%
Rec. 2020 Picture Mode
Desktop
HDR Standard
Text Clarity
9.0
9.5
ClearType On
ClearType Off
Pixel Type
IPS
IPS
Pixels
Subpixel Layout
RGB
RGB
Reflections
7.8
7.3
Average Room
Average Room Off Picture
Bright Room Off Picture
Screen Finish
Matte
Matte
Total Reflections
4.5%
5.6%
Indirect Reflections
2.5%
3.0%
Calculated Direct Reflections
2.0%
2.6%
Gradient
9.8
9.9
Gradient Picture
Color Depth
10 Bit
10 Bit
SDR Color Volume
9.0
sRGB Color Volume ITP Picture
sRGB In ICtCp
98.9%
Adobe RGB Color Volume ITP Picture
Adobe RGB In ICtCp
81.2%
sRGB Picture Mode
Custom
Adobe RGB Picture Mode
Photo
Image Retention
9.3
Image Retention Picture
IR After 0 Min Recovery
0.26%
IR After 2 Min Recovery
0.00%
IR After 4 Min Recovery
0.00%
IR After 6 Min Recovery
0.00%
IR After 8 Min Recovery
0.00%
IR After 10 Min Recovery
0.00%
Color Bleed
10
Color Bleed Horizontal
Pixel Row Error
0.000%
Color Bleed Vertical
Pixel Column Error
0.000%
Motion
Refresh Rate
6.0
Native Refresh Rate
60 Hz
60 Hz
Max Refresh Rate
60 Hz
60 Hz
Max Refresh Rate Over DP
60 Hz
Max Refresh Rate Over HDMI
60 Hz
Max Refresh Rate Over DP @ 10-bit
60 Hz
Max Refresh Rate Over HDMI @ 10-Bit
30 Hz
Variable Refresh Rate (VRR)
Variable Refresh Rate
Yes
FreeSync
FreeSync
Yes
Yes
G-SYNC
Compatible (Tested)
Partially Compatible
VRR Maximum
60 Hz
60 Hz
VRR Minimum
40 Hz
40 Hz
VRR Supported Connectors
DisplayPort
DisplayPort, HDMI
Native
60 Hz
60 Hz
Max Refresh Rate
60 Hz
60 Hz
Variable Refresh Rate
Yes
VRR Motion Performance
5.3
Pursuit Photo VRR
OD Mode CAD Comparison
Recommended VRR OD Setting
Normal
Variable Overdrive Advertised
No
Avg. CAD
373
Best CAD
373
Worst CAD
373
Refresh Rate Compliance
3.9
Fast GTG Sequence
VRR Compliance
Compliance @ Max Hz
59%
Compliance @ 120 FPS
N/A
Compliance @ 60 FPS
59%
CAD @ Max Refresh Rate
4.8
Pursuit Photo At Max Refresh
CAD Heatmap At Max Refresh
OD Transition Max Refresh Rate
OD extreme
0 to 31
Recommended Overdrive Setting
Normal
Avg. CAD
373
Best 10% CAD
215
Worst 10% CAD
583
Response Time @ Max Refresh Rate
First Response Time
15.2 ms
6.8 ms
Total Response Time
15.2 ms
13.5 ms
Recommended Overdrive Setting
Normal
Normal
RGB Overshoot
0 RGB
1.3%
Worst 10% RGB Overshoot
0 RGB
2.8%
Worst 10% First Response Time
25.0 ms
7.4 ms
Worst 10% Total Response Time
25.0 ms
14.7 ms
Heatmap First Response
Heatmap Total Response
Heatmap RGB Overshoot
Motion Blur Picture
Response Time Table
CAD @ 120Hz
0.0
Pursuit Photo 120Hz
CAD Heatmap 120Hz
OD Transition 120Hz
-
0 to 31
Recommended Overdrive Setting
No 120Hz Refresh Rate
Avg. CAD
N/A
Best 10% CAD
N/A
Worst 10% CAD
N/A
Response Time @ 120Hz
Worst 10% First Response Time
N/A
RGB Overshoot
N/A
Total Response Time
N/A
First Response Time
N/A
Recommended Overdrive Setting
No 120Hz Refresh Rate
Worst 10% Total Response Time
N/A
Worst 10% RGB Overshoot
N/A
120Hz First Response Heatmap
120Hz Total Response Heatmap
120Hz Heatmap RGB Overshoot
CAD @ 60Hz
4.8
Pursuit Photo 60Hz
CAD Heatmap 60Hz
OD Transition 60Hz
OD extreme
0 to 31
Recommended Overdrive Setting
Normal
Avg. CAD
373
Best 10% CAD
215
Worst 10% CAD
583
Response Time @ 60Hz
Recommended Overdrive Setting
Normal
Normal
First Response Time
15.2 ms
6.8 ms
Total Response Time
15.2 ms
13.5 ms
RGB Overshoot
0 RGB
1.3%
Worst 10% Total Response Time
25.0 ms
14.7 ms
Worst 10% First Response Time
25.0 ms
7.4 ms
Worst 10% RGB Overshoot
0 RGB
2.8%
60Hz First Response Heatmap
60Hz Total Response Heatmap
60Hz RGB Overshoot Heatmap
Backlight Strobing (BFI)
Backlight Strobing Picture
Backlight Strobing Frequency Picture
Backlight Strobing (BFI)
No BFI
No BFI
Maximum Frequency
N/A
N/A
Minimum Frequency
N/A
N/A
Longest Pulse Width Brightness
N/A
Shortest Pulse Width Brightness
N/A
Pulse Width Control
No BFI
Pulse Phase Control
No BFI
Pulse Amplitude Control
No BFI
VRR At The Same Time
No BFI
VRR Flicker
9.4
VRR Flicker Video
VRR Flicker Graph
Dark Gray Flicker
0.5 RGB
Middle Gray Flicker
0.3 RGB
Light Gray Flicker
0.1 RGB
Image Flicker
10
10
Backlight Picture
Flicker-Free
Yes
Yes
PWM Dimming Frequency
0 Hz
0 Hz
Response Time @ 60Hz
8.3
Motion Blur Picture
Response Time Table
Best Overdrive Setting
Normal
Normal
Rise / Fall Time
15.2 ms
6.8 ms
Total Response Time
15.2 ms
13.5 ms
Overshoot Error
0 RGB
1.3%
Dark Rise / Fall Time
25.0 ms
7.4 ms
Dark Total Response Time
25.0 ms
14.7 ms
Dark Overshoot Error
0 RGB
2.8%
Inputs
Input Lag
8.3
9.0
Native Resolution @ Max Hz
8.7 ms
8.8 ms
Native Resolution @ 120Hz
N/A
Native Resolution @ 60Hz
8.7 ms
8.8 ms
Variable Refresh Rate
9.2 ms
Variable Refresh Rate @ 60Hz
9.4 ms
10 Bit HDR
8.9 ms
Backlight Strobing (BFI)
N/A
N/A
Resolution
8.8
9.2
Native Resolution
3840 x 2160
3840 x 2160
Aspect Ratio
16:9
16:9
Megapixels
8.3 MP
8.3 MP
Pixel Density
163 PPI
164 PPI
Screen Diagonal
26.9"
Screen Area
310 in²
PS5 Compatibility
2.3
PS5 Compatibility Photo
PS5 Compatibility Table
4k @ 120Hz
No
4k @ 60Hz
Yes
1440p @ 120Hz
No
1440p @ 60Hz
Yes
1080p @ 120Hz
No
1080p @ 60Hz
Yes
Xbox Series X|S Compatibility
3.9
XSX Compatibility Photo
XSX Compatibility Table
4k @ 120Hz
No
4k @ 60Hz
Yes
1440p @ 120Hz
No
1440p @ 60Hz
Yes
1080p @ 120Hz
No
1080p @ 60Hz
Yes
Inputs Photos
Inputs 1
Inputs 2
Video And Audio Ports
DisplayPort
1 (DP 1.2)
1 (DP 1.2)
DisplayPort Transmission Bandwidth
No DisplayPort 2.1
Mini DisplayPort
No
No
HDMI
2 (HDMI 2.0)
2 (HDMI 2.0)
HDMI 2.1 Bandwidth
No HDMI 2.1
DVI
No
No
VGA
No
No
Daisy Chaining
No
3.5mm Audio Out
1
1
HDR10
Yes
Yes
3.5mm Audio In
No
3.5mm Microphone In
No
No
DisplayPort Out
No
USB
0
No
USB C
0
No
Digital Optical Audio Out
No
Analog Audio Out RCA
No
Power Supply
Internal
External Brick
USB
USB-A Ports
0
No
USB-A Rated Speed
No USB-A Ports
USB-B Upstream Port
No
USB-C Ports
0
No
USB-C Upstream
No USB-C Ports
USB-C Rated Speed
No USB-C Ports
USB-C Power Delivery
No USB-C Ports
USB-C DisplayPort Alt Mode
No USB-C Ports
Thunderbolt
No
macOS Compatibility
macOS Screenshot
Features
Additional Features
Speakers
Yes
No
RGB Illumination
No
No
Multiple Input Display
PIP + PBP
No
KVM Switch
No
HDR10
Yes
Yes
On-Screen Display (OSD)
OSD Picture
Controls
Controls Picture
In The Box
In The Box Picture
Check Price
27"
S2721QS
SEE PRICE
Amazon.com27"
27UK650-W
SEE PRICE
Amazon.com27"
S2721QS
SEE PRICE
BestBuy.com27"
27UK650-W
SEE PRICE
Walmart.com27"
S2721QS
SEARCH
Samsung.com27"
27UK650-W
SEARCH
BestBuy.com27"
S2721QS
SEARCH
Walmart.com
Dell S2721QS
LG 27UK650-W
Comments
LG 27UK650-W vs Dell S2721QS: 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.