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DELL U4021QW reviews
Brand: DELL More DELL monitors reviews →
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Compare DELL U4021QW reviews, specifications and available UK retailer offers. Check the details for this exact model and follow the original critics’ findings.
Manufacturer codeDELL-U4021QW
The product, explained
About the DELL U4021QW
DELL DELL-U4021QW is listed in the computer monitors category. The recorded specifications include display diagonal: 100.8 cm (39.7"); display resolution: 5120 x 2160 pixels; panel type: IPS; maximum refresh rate: 60 Hz. This entry covers manufacturer code DELL-U4021QW. Specifications relate to this exact source record; other editions or packages may differ.
The 100.8 cm (39.7") display is specified at 5120 x 2160 pixels. Consider these together: a larger screen provides more physical space, while resolution determines the number of pixels available. Neither specification establishes brightness, colour accuracy or motion quality.
The listed maximum refresh rate is 60 Hz. To use it, the source device, cable, resolution and input must all support the intended mode. Refresh rate is separate from response time and input lag.
- Screen size
- 100.8 cm (39.7")
- Screen resolution
- 5120 x 2160 pixels
- Panel type
- IPS
- Maximum refresh rate
- 60 Hz
- Response time
- 8 ms
- Display brightness (typical)
- 300 cd/m²
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Expert reviews 1
Independent ratings, converted to the same five-point scale. Each card links to the original review and identifies the available evidence.
TechRadar
4.00 / 5Original rating: 4 / 5
Reviewed model: DELL U4021QW. Colour and included accessories may differ from this listing.
Read the full review ↗Checked 10 Oct 2026
More expert reviews
TFTCentral
Dell UltraSharp U4021QW
By Simon Baker. Read the publisher’s assessment of this model.
Read the full review ↗Review link · Not included in the COR Score
Independent reviews, made comparable
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8/ 104.00/ 5
An illustration of conversion, not this product’s rating.
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DELL U4021QW specifications
Manufacturer code: DELL-U4021QW · Icecat product 88727511 · Checked 17 Sep 2026. Specifications belong to this exact model.
Key specifications
The main features to compare for this exact model. Missing details are not assumed.
| Screen size | 100.8 cm (39.7") |
|---|---|
| Screen resolution | 5120 x 2160 pixels |
| Panel type | IPS |
| Maximum refresh rate | 60 Hz |
| Response time | 8 ms |
| Display brightness (typical) | 300 cd/m² |
| High Dynamic Range (HDR) supported | No |
| HDMI ports | 2 |
| DisplayPort connections | 1 |
More product specifications
Open a section for the details that matter to you.
Audio & listening6 details
| Number of speakers | 2 |
|---|---|
| Rated audio power (RMS) | 18 W |
| Built-in speakers | Yes |
| Audio input | No |
| Headphone out | Yes |
| Headphone outputs | 1 |
Display11 details
| Display technology | LCD |
|---|---|
| Touchscreen | No |
| Anti-glare screen | Yes |
| Screen shape | Curved |
| Screen curvature rating | 2500R |
| Contrast ratio (typical) | 1000:1 |
| Viewing angle, horizontal | 178° |
| Viewing angle, vertical | 178° |
| Display number of colours | 1.073 billion colours |
| Colour gamut standard | DCI-P3 |
| Colour gamut | 98% |
Processor, memory & storage3 details
| Supported graphics resolutions | 640 x 480 (VGA), 720 x 400, 800 x 600 (SVGA), 1024 x 768 (XGA), 1152 x 864 (XGA+), 1280 x 800 (WXGA), 1600 x 1200 (UXGA), 1680 x 1050 (WSXGA+), 1920 x 1080 (HD 1080), 2048 x 1152, 2560 x 1080, 3840 x 2160, 4096 x 2160, 5120 x 2160 |
|---|---|
| Storage temperature (T-T) | -20 - 60 °C |
| Storage relative humidity (H-H) | 5 - 90% |
Camera, image & video2 details
| Supported video modes | 480p, 720p, 1080i, 1080p |
|---|---|
| Built-in camera | No |
Printing, scanning & paper3 details
| Horizontal scan range | 27 - 133.286 kHz |
|---|---|
| Vertical scan range | 24 - 86 Hz |
| Total carbon footprint (kg of CO2e) | 926 |
Connections & wireless15 details
| Built-in USB hub | Yes |
|---|---|
| USB upstream port type | USB Type-B |
| Number of upstream ports | 1 |
| Number of USB Type-B upstream ports quantity | 1 |
| USB Type-A downstream ports quantity | 4 |
| USB Type-C downstream ports quantity | 1 |
| DVI port | No |
| HDMI | Yes |
| HDMI version | 2.0 |
| DisplayPort version | 1.4 |
| Thunderbolt 3 ports quantity | 1 |
| Headphone connectivity | 3.5 mm |
| Wi-Fi | No |
| Panel mounting interface | 100 x 100 mm |
| RJ-45 ports quantity | 1 |
Power & battery15 details
| USB Power Delivery up to | 90 W |
|---|---|
| Energy efficiency class (SDR) | G |
| Energy efficiency class (HDR) | Not available |
| Energy consumption (SDR) per 1000 hours | 41 kWh |
| Power consumption (typical) | 41.3 W |
| Power consumption (standby) | 0.3 W |
| Power consumption (max) | 240 W |
| Power consumption (off) | 0.3 W |
| Power consumption (PowerSave) | 44.81 W |
| AC input voltage | 100 - 240 V |
| AC input frequency | 50 - 60 Hz |
| Input current | 2.8 A |
| Power supply type | Internal |
| Energy efficiency scale | A to G |
| Carbon emissions, energy usage (kg of CO2e) | 377 |
Controls & features1 detail
| Operating temperature (T-T) | 0 - 40 °C |
|---|
Design & dimensions17 details
| Product colour | Silver |
|---|---|
| Front bezel colour | Black |
| Feet colour | Silver |
| VESA mounting | Yes |
| Height adjustment | Yes |
| Adjustable height (max) | 12 cm |
| Width (with stand) | 946.6 mm |
| Depth (with stand) | 248 mm |
| Height (with stand) | 577.3 mm |
| Weight (with stand) | 13.8 kg |
| Width (without stand) | 946.6 mm |
| Depth (without stand) | 59.6 mm |
| Height (without stand) | 419.1 mm |
| Weight (without stand) | 9.5 kg |
| Bezel width (side) | 1.13 cm |
| Bezel width (top) | 1.13 cm |
| Bezel width (bottom) | 1.58 cm |
Further product details24 details
| HD type | 4K DCI |
|---|---|
| Native aspect ratio | 21:9 |
| Backlight type | LED |
| Response time (fast) | 5 ms |
| Pixel pitch | 0.1815 x 0.1815 mm |
| Pixel density | 140 ppi |
| Viewable size, horizontal | 92.9 cm |
| Viewable size, vertical | 39.2 cm |
| Viewable size diagonal | 100.9 cm |
| NVIDIA G-SYNC | No |
| AMD FreeSync | No |
| Market positioning | Graphics design |
| Cable lock slot | Yes |
| Pivot | No |
| Swivelling | Yes |
| Swivel angle range | -30 - 30° |
| Tilt adjustment | Yes |
| Tilt angle range | -5 - 21° |
| Operating relative humidity (H-H) | 10 - 80% |
| Total carbon emissions, standard deviation (kg of CO2e) | 149 |
| Carbon emissions, manufacturing (kg of CO2e) | 430.6 |
| Carbon emissions, logistics (kg of CO2e) | 112 |
| Carbon emissions, end-of-life (kg of CO2e) | 6.23 |
| PAIA version | 1.2.13, 2021 |
Packaging & supplied accessories2 details
| Package weight | 21.6 kg |
|---|---|
| Harmonized System (HS) code | 85285210 |
Specifications describe the supplied product data, not measured review results. Battery life, range and performance figures are source claims and can vary with use.
Build your shortlist
Compare other monitors
More products in this category. Compare their exact features, original reviews and available offers alongside the DELL U4021QW.
| Product | Brand | Shown model | COR Score |
|---|---|---|---|
| Sony INZONE M10S reviews → | Sony | SDM27Q10SB.CEI27 inch | 4.36/56 critic reviews |
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| GIGABYTE FO27Q5P reviews → | GIGABYTE | AORUS FO27Q5P27 inch · Black | tbd2 critic reviews · Available after 3 |
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Your questions, answered
DELL U4021QW FAQs
How many expert reviews are available for DELL U4021QW?
This page currently includes 1 scored critic review. Each publisher counts once. Follow the review cards for the original verdict and the version that was tested.
What is the COR Score for DELL U4021QW?
The COR Score is tbd. We publish a combined score only after at least three distinct critics have usable ratings. Any individual reviews already available remain visible.
Which exact version does this page cover?
This page identifies DELL U4021QW using manufacturer code DELL-U4021QW. Check that code, configuration and supplied accessories against the retailer listing. Related-version reviews are labelled separately and do not contribute to this version’s score.
What is the listed display diagonal for DELL U4021QW?
The source specification records display diagonal as 100.8 cm (39.7"). This is a specification, not an independent performance measurement. Check the exact model and the original critic reviews for real-world results.
What is the listed display resolution for DELL U4021QW?
The source specification records display resolution as 5120 x 2160 pixels. This is a specification, not an independent performance measurement. Check the exact model and the original critic reviews for real-world results.
Where can I compare prices for DELL U4021QW?
Use the retailer-offer section on this page for available matched offers. If no offer is shown, we do not currently have a verified price. Confirm model, stock, delivery and the final total at the retailer; coverage does not include every seller.
Does a higher refresh rate make every app better?
It can make movement feel smoother, but benefits depend on the computer, connection and the activity.
Can I use a USB-C monitor with any laptop?
Not necessarily. Check the laptop port supports the required display mode and charging level.
Is a curved monitor always more immersive?
It depends on size, desk distance and use. Try it for text and multi-window work, not only video.
How should I use the specifications alongside reviews?
Use the recorded features to check compatibility and make a shortlist. Read the original reviews for measured performance, everyday use and the tested configuration.
Understand your options
Monitor buying guides
Explore one topic in depth before making your shortlist.
Start with the complete buying guide →Monitor resolution and size: finding a comfortable matchResolution counts pixels; screen size determines how densely they are packed. The same resolution can look spacious on one diagonal and coarse on another, so compare the combination rather than either number alone.Monitor refresh rates: 60Hz, 120Hz, 144Hz and beyondChoose refresh rate from actual frame rate, motion needs, connection limits and image-quality priorities.IPS, VA and OLED monitors: choosing a panel typeChoose panel behaviour around text, contrast, motion, viewing position and static desktop use.USB-C monitors as laptop docksCheck charging power, video mode, hub bandwidth, network and downstream ports as one system.