Products
Dell U4919DW
Dell UltraSharp U4021QW
Tested using Methodology v1.0
Updated Jun 13, 2025 07:53 PM
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Tested using Methodology v1.1
Updated Jul 24, 2024 04:00 PM
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Size49"
Pixel Type
IPS
Variable Refresh Rate
No
Native Resolution5120x1440
Max Refresh Rate
60 Hz
Size40"
Pixel Type
IPS
Variable Refresh Rate
No VRR
Native Resolution5120 x 2160
Max Refresh Rate
60 Hz
Our Verdict
Dell U4919DW
Dell UltraSharp U4021QW
The Dell U4919DW and the Dell UltraSharp U4021QW are both ultrawide monitors that are unique in their own ways. The U4919DW is a super ultrawide with a 32:9 aspect ratio that's like having two full monitors in one. It's great if you need a ton of screen real estate and don't want a dual monitor setup. The U4021QW, on the other hand, has a more manageable 21:9 aspect ratio, but it has a 5120x2160 resolution and greater pixel density that produces an exceptionally sharp image.
Variants
- U4919DW (49")
- UltraSharp U4021QW (40")
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49"
U4919DW
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40"
UltraSharp U4021QW
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49"
U4919DW
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Walmart.com
40"
UltraSharp U4021QW
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49"
U4919DW
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40"
UltraSharp U4021QW
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49"
U4919DW
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40"
UltraSharp U4021QW
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Main Differences for
Mixed Usage
Mixed Usage
Threshold
Mixed Usage
7.5
7.5
Ergonomics
4.2
6.4
Full Comparison
Design
Style
Design Picture
Size
49"
40"
Curved
Yes
Yes
Curve Radius
3800R
2500R
Weight (without stand)
24.7 lbs (11.2 kg)
20.9 lbs (9.5 kg)
Weight (with stand)
36.8 lbs (16.7 kg)
30.4 lbs (13.8 kg)
Stand
Stand Picture
Width
15.0" (38.1 cm)
15.2" (38.5 cm)
Depth
13.8" (35.1 cm)
9.7" (24.7 cm)
Ergonomics
4.2
6.4
Ergonomics Picture
Height Adjustment
3.6" (9.1 cm)
4.7" (12.0 cm)
Switch Portrait/Landscape
No
No
Swivel Range
N/A
-35° to 35°
Tilt Range
-20° to 5°
-20° to 5°
Back
Back Picture
Wall Mount
VESA 100x100
VESA 100x100
Borders
Borders Picture
Borders
0.4" (1.0 cm)
0.4" (1.1 cm)
Thickness
Thickness Picture
Thickness (with stand)
8.1" (20.6 cm)
8.3" (21.1 cm)
Thickness (without stand)
4.1" (10.4 cm)
4.0" (10.1 cm)
Build Quality
8.0
7.0
Build Quality Picture
Picture Quality
Contrast
6.3
5.9
Checkerboard Picture
LCD Type
IPS
IPS
Native Contrast
1,184 : 1
943 : 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
Edge
Edge
SDR Peak Brightness
8.0
7.1
SDR Real Scene
338 cd/m²
256 cd/m²
SDR Peak 2% Window
352 cd/m²
279 cd/m²
SDR Peak 10% Window
353 cd/m²
279 cd/m²
SDR Peak 25% Window
353 cd/m²
280 cd/m²
SDR Peak 50% Window
354 cd/m²
280 cd/m²
SDR Peak 100% Window
354 cd/m²
280 cd/m²
SDR Sustained 2% Window
351 cd/m²
278 cd/m²
SDR Sustained 10% Window
352 cd/m²
279 cd/m²
SDR Sustained 25% Window
353 cd/m²
279 cd/m²
SDR Sustained 50% Window
353 cd/m²
279 cd/m²
SDR Sustained 100% Window
353 cd/m²
280 cd/m²
SDR ABL
0.000
0.000
HDR Peak Brightness
0.0
0.0
HDR Real Scene
N/A
N/A
HDR Peak 2% Window
N/A
N/A
HDR Peak 10% Window
N/A
N/A
HDR Peak 25% Window
N/A
N/A
HDR Peak 50% Window
N/A
N/A
HDR Peak 100% Window
N/A
N/A
HDR Sustained 2% Window
N/A
N/A
HDR Sustained 10% Window
N/A
N/A
HDR Sustained 25% Window
N/A
N/A
HDR Sustained 50% Window
N/A
N/A
HDR Sustained 100% Window
N/A
N/A
HDR ABL
N/A
N/A
Horizontal Viewing Angle
7.3
8.0
Horizontal Viewing Angle Video
Horizontal Chroma Graph
Color Washout From Left
43°
Color Washout From Right
45°
Horizontal Color Shift Picture
Horizontal Hue Graph
Color Shift From Left
37°
49°
Color Shift From Right
39°
51°
Horizontal Brightness Picture
Horizontal Black Level Picture
Horizontal Lightness Graph
Brightness Loss From Left
46°
49°
Brightness Loss From Right
47°
51°
Black Level Raise From Left
75°
70°
Black Level Raise From Right
75°
70°
Curve Radius
3,800R
Gamma Shift From Left
40°
Gamma Shift From Right
41°
Vertical Viewing Angle
8.0
7.1
Vertical Viewing Angle Video
Vertical Chroma Graph
Color Washout From Below
33°
Color Washout From Above
30°
Vertical Color Shift Picture
Vertical Hue Graph
Color Shift From Below
27°
38°
Color Shift From Above
27°
33°
Vertical Brightness Picture
Vertical Black Level Picture
Vertical Lightness Graph
Brightness Loss From Below
33°
36°
Brightness Loss From Above
33°
32°
Black Level Raise From Below
75°
70°
Black Level Raise From Above
75°
70°
Gamma Shift From Below
43°
Gamma Shift From Above
36°
Gray Uniformity
8.4
8.5
50% Uniformity Picture
50% Std. Dev.
3.628%
2.994%
50% DSE
0.123%
0.122%
5% Uniformity Picture
5% Std. Dev.
0.414%
0.398%
5% DSE
0.048%
0.032%
Black Uniformity
5.8
6.8
Native Black Uniformity Picture
Native Std. Dev.
2.158%
1.434%
Black Uniformity Picture With Local Dimming
Std. Dev. w/ L.D.
N/A
N/A
Pre Calibration
8.2
9.1
Pre Calibration Picture
Pre Gamma Curve Picture
Pre Color Picture
Picture Mode
Standard
Color Space (sRGB)
Luminance
306 cd/m²
210 cd/m²
Luminance Settings
75
75
Contrast Setting
75
75
RGB Controls
N/A
Default
Gamma Setting
No Gamma Setting
Color Temperature
6,778 K
6,281 K
White Balance dE
2.66
1.50
Color dE
2.02
0.99
Gamma
2.26
2.16
Post Calibration
9.3
9.7
Post Calibration Picture
Post Gamma Curve Picture
Post Color Picture
Picture Mode
Custom Color
Custom Color
Luminance
100 cd/m²
100 cd/m²
Luminance Settings
19
28
Contrast Setting
75
75
RGB Controls
94-98-100
98-97-100
Gamma Setting
No Gamma Setting
Color Temperature
6,431 K
6,456 K
White Balance dE
0.98
0.65
Color dE
0.78
0.31
Gamma
2.17
2.18
SDR Color Gamut
8.6
9.4
Color Gamut sRGB Picture
sRGB xy
96.6%
100.0%
Color Gamut ARGB Picture
Adobe RGB xy
74.7%
88.5%
sRGB Picture Mode
Custom Color
Adobe RGB Picture Mode
Custom Color
SDR Color Volume
8.8
9.6
sRGB Color Volume ITP Picture
sRGB In ICtCp
95.9%
98.2%
Adobe RGB Color Volume ITP Picture
Adobe RGB In ICtCp
79.5%
93.2%
sRGB Picture Mode
Custom Color
Adobe RGB Picture Mode
Custom Color
HDR Color Gamut
0.0
0.0
Wide Color Gamut
No
N/A
Color Gamut DCI-P3 Picture
DCI P3 xy
N/A
N/A
Color Gamut Rec.2020 Picture
Rec. 2020 xy
N/A
N/A
DCI P3 Picture Mode
No HDR
Rec. 2020 Picture Mode
No HDR
HDR Color Volume
0.0
0.0
P3 Color Volume ITP Picture
DCI-P3 In ICtCp
N/A
N/A
2020 Color Volume ITP Picture
Rec. 2020 In ICtCp
N/A
N/A
DCI P3 Picture Mode
No HDR
Rec. 2020 Picture Mode
No HDR
Image Retention
10
10
Image Retention Picture
IR After 0 Min Recovery
0.00%
0.00%
IR After 2 Min Recovery
0.00%
0.00%
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
9.7
9.8
Gradient Picture
Color Depth
10 Bit
10 Bit
Color Bleed
10
10
Color Bleed Horizontal
Pixel Row Error
0.001%
0.001%
Color Bleed Vertical
Pixel Column Error
0.002%
0.001%
Reflections
8.0
6.7
Average Room
Average Room Off Picture
Bright Room Off Picture
Screen Finish
Matte
Total Reflections
6.6%
Indirect Reflections
3.2%
Calculated Direct Reflections
3.4%
Text Clarity
9.5
ClearType On
Pixel Type
IPS
IPS
ClearType Off
Pixels
Sub-Pixel Layout
RGB
Motion
Response Time @ Max Refresh Rate
8.2
7.2
Motion Blur Picture
Motion Blur Picture
Response Time Chart
Response Time Table
Best Overdrive Setting
Normal
Normal
Rise / Fall Time
5.5 ms
6.5 ms
Total Response Time
16.7 ms
18.7 ms
Overshoot Error
7.5%
Dark Rise / Fall Time
6.6 ms
Dark Total Response Time
20.3 ms
Dark Overshoot Error
12.5%
Response Time @ 60Hz
7.2
Motion Blur Picture
Response Time Table
Best Overdrive Setting
Normal
Rise / Fall Time
6.5 ms
Total Response Time
18.7 ms
Overshoot Error
7.5%
Dark Rise / Fall Time
6.6 ms
Dark Total Response Time
20.3 ms
Dark Overshoot Error
12.5%
Image Flicker
7.5
10
Backlight Picture
Flicker-Free
Yes
Yes
PWM Dimming Frequency
0 Hz
0 Hz
Black Frame Insertion (BFI)
N/A
No BFI
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)
N/A
No BFI
BFI Picture
BFI Frequency Picture
BFI Maximum Frequency
N/A
N/A
BFI Minimum Frequency
N/A
N/A
Refresh Rate
6.7
5.9
Variable Refresh Rate
No
No VRR
Native
60 Hz
Max Refresh Rate
60 Hz
60 Hz
Factory Overclock
N/A
Variable Refresh Rate
No
No
FreeSync
No
G-SYNC
No
No
VRR Maximum
N/A
N/A
VRR Minimum
N/A
No VRR
VRR Maximum With OC
N/A
VRR Supported Connectors
N/A
No VRR
Inputs
Input Lag
8.7
9.0
Native Resolution
9.1 ms
8.9 ms
Non-Native Res @ Native Refresh
40.7 ms
Native Resolution @ 60Hz
9.1 ms
8.9 ms
Variable Refresh Rate
N/A
N/A
Variable Refresh Rate @ 60Hz
N/A
10 Bit HDR
N/A
N/A
Black Frame Insertion (BFI)
N/A
N/A
Resolution And Size
9.3
9.4
Native Resolution
5120x1440
5120 x 2160
Aspect Ratio
32:9
21:9
Megapixels
7.4 MP
11.1 MP
Pixel Density
109 PPI
137 PPI
Screen Diagonal
48.8"
40.0"
Screen Area
623 in²
581 in²
Inputs
Inputs 1
Inputs 2
Total Inputs
DisplayPort
1 (DP 1.4)
1 (DP 1.4)
Mini DisplayPort
No
No
HDMI
2 (HDMI 2.0)
2 (HDMI 2.0)
DVI
No
No
VGA
No
No
DisplayPort Out
No
No
USB
5 (USB 3.0)
4 (USB 3.0)
USB C
1 (USB, USB PD, DP Alt Mode)
2 (1x Thunderbolt 3, PD, DP Alt Mode, 1x USB 3.2 Gen 2)
Analog Audio Out 3.5mm
No
1
Microphone In 3.5mm
No
No
Digital Optical Audio Out
No
No
Analog Audio Out RCA
No
No
Power Supply
Internal
Internal
Features
Additional Features
RGB Illumination
No
Speakers
No
Yes
HDR10
No
No
Multiple Input Display
PBP
PIP + PBP
On-Screen Display (OSD)
OSD Picture
Controls
Controls Picture
In The Box
In The Box Picture
Check Price
49"
U4919DW
SEE PRICE
Amazon.com
40"
UltraSharp U4021QW
SEE PRICE
Amazon.com
49"
U4919DW
SEE PRICE
Walmart.com
40"
UltraSharp U4021QW
SEE PRICE
Walmart.com
49"
U4919DW
SEARCH
B&H
40"
UltraSharp U4021QW
SEARCH
B&H
49"
U4919DW
SEARCH
BestBuy.com
40"
UltraSharp U4021QW
SEARCH
BestBuy.com
Dell U4919DW
Dell UltraSharp U4021QW
Comments
Dell U4919DW vs Dell UltraSharp U4021QW: Main Discussion
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