![old windows folder icon](https://www.gadgetreview.com/wp-content/uploads/breadcrumb-folder-e1705975404293.png)
out of
Computer Monitors
![](https://www.gadgetreview.com/wp-content/uploads/dell-u4021qw-review.jpg)
Dell U4021QW Review
![Kenn Muguna Avatar](https://www.gadgetreview.com/wp-content/uploads/Kenn-Muguna-32x32.jpeg)
![Kenn Muguna Avatar](https://www.gadgetreview.com/wp-content/uploads/Kenn-Muguna-70x70.jpeg)
→
Published
True Score
True Score is an AI-powered algorithm of product tests and customer reviews.
Mixed Reviews
![](https://www.gadgetreview.com/wp-content/uploads/not-bad-bubble-1-60x60.png)
Experts
Consumers
Expert Rankings
(
)
The Dell U4021QW is great for productivity thanks to its 40-inch widescreen and accurate color reproduction. It lacks a variable refresh rate, and HDR support, and has grayish blacks, making it unsuitable for pro gamers.
![](https://www.gadgetreview.dev/wp-content/uploads/best-price-flame-64x108.png)
We’re reader-supported. Commissions finance our mission. Our ‘True Score‘ system independently powers ratings. Learn more
Product Snapshot
Overview
The Dell UltraSharp U4021QW is a high-end monitor released in 2021 that promises to deliver excellent picture quality thanks to its superb 5K resolution. The monitor features a curved screen that provides wide viewing angles, and with 0.4-inch bezels, the display is very easily adaptable to a multi-screen setup. The monitor’s 40-inch screen offers a wider field of view compared to the 34-inch LG 34GP83A-B, and with the stand’s great ergonomics, users will be able to easily adjust the display according to their preference. Make sure to read through the rest of this Dell UltraSharp U4021QW review to see how well it compares to other top-rated computer monitors.
Consensus
our Verdict
![](https://www.gadgetreview.com/wp-content/uploads/robot-1-60x60.png)
The Dell U4021QW is a great pick for professionals and designers who need a large screen for increased productivity or color-accurate photo editing. However, gamers should look elsewhere, as this monitor has a low 60Hz refresh rate and doesn’t support FreeSync or Adaptive-Sync technologies. On the plus side, it has wide viewing angles, but its lack of HDR support and grayish blacks mean it’s not ideal for movie-watching.
ReasonS to Buy
- High 5K resolution delivers sharp images
- Ultrawide screen is ideal for multitasking
- Great ergonomics
- Wide viewing angles
Reason to Avoid
- No support for HDR content
- Low 60Hz refresh rate
- No support for FreeSync or G-Sync
- Low contrast ratio and grayish blacks
Dell U4021QW Specs
Display Type | LCD | |
HDMI Inputs | 2 | |
HDR Format | n/a | |
Max Resolution | 5120 x 2160 | |
![]() | Panel Type | IPS |
Refresh Rate | 60 Hz | |
![]() | Response Time | 8 ms |
Screen size | 39.7" | |
![]() | Sync Technology | n/a |
All Specs
Test Results
These are the most important criteria to test for Computer Monitors based on our comprehensive Testing Methodology.
Brightness (nits) | 256 |
Contrast Ratio (as ratio, x:1) | 943 |
Color Gamut/Accuracy % (DCI P3 xy) | 0 |
Color Gamut/Accuracy % (DCI P3 uv) | 0 |
Color Gamut % (Adobe RGB Coverage xy) | 88.5 |
Color Gamut % (sRGB Coverage xy) | 100 |
Color Gamut % (Rec. 2020 Coverage xy) | 0 |
Color Gamut % (Rec. 709 Coverage xy) | 0 |
Input Lag (ms) | 8.9 |
Response Time (ms) | 6.5 |
Reflections % (Total Reflections) | 6.6 |
Horizontal Viewing Angle (Washout Left) | 43 |
Horizontal Viewing Angle (Washout Right) | 45 |
Vertical Viewing Angle (Washout Above) | 30 |
Vertical Viewing Angle (Washout Below) | 33 |
All Tests
![](https://www.gadgetreview.com/wp-content/uploads/newsletter-header.png)
![](https://www.gadgetreview.com/wp-content/uploads/newsletter-main.jpeg)
Like what you’re reading? Get trustworthy, transparent product reviews and the latest tech news delivered to your inbox every morning.
All Stores
Updated every 24 hours
- Save $810$2,099.99$1,289.99
- Save $618$2,599.99$1,981.55
Score Card
E
Expert Score
*.75
We place a 75% weighted value on Expert Test Scores
C
Customer Score
*.25
We place a 25% weighted value on Customer Scores
True Score
Any product with a True Score above 70 is a Mixed Reviews
Expert Scores
Publications with higher Trust Ratings are given more weight.
- 73The Dell U4021QW is a curved ultrawide UHD display that brings a premium look and… Read More
By:
John Loeffler - 80The Dell U4021QW is a good all-around monitor. The large size is well-suited to productivity… Read More
By:
Samuel Breton
Customer Scores
Learn More About Computer Monitors
Computer Monitor Buying Guides_
Latest News_