The Dell U4025QW is a 40-inch premium ultrawide office and editing monitor with a 2500R curve. It joins similar monitors like the LG 40WP95C-W and the Lenovo ThinkVision P40w-20 and is ideal if you need to work with a large amount of data in a spreadsheet or database or compare significant amounts of information while writing or editing. The monitor supports internal Multi-Stream Transport (MST), so you can subdivide the screen into multiple virtual monitors for easier window management, as well as daisy chaining, where you connect one monitor to another and only have to connect the first monitor to your computer. Additionally, it has a KVM switch, allowing you to switch between sources and use the same keyboard and mouse connected to the monitor. It also has an IPS Black display to enhance contrast and a 120Hz refresh rate, so documents and data respond more quickly than on a 60Hz display when scrolling.
Our Verdict
The Dell U4025QW is mediocre for PC gaming. Though it has a 120Hz refresh rate, fast-moving objects look quite blurry, so it's not a good choice for games with a lot of motion. While it displays HDR colors extremely well, it has a terrible local dimming system and doesn't get bright enough for highlights to pop. It's not a monitor to buy for gaming, but it works well for slower, text-heavy games like turn-based strategy games, thanks to its superb text clarity and vibrant colors.
- Displays a wide range of colors.
- Vivid colors in HDR.
- Fast-moving objects look blurry.
- Terrible local dimming feature.
- Highlights only pop a bit in HDR.
The Dell U4025QW isn't a good choice for console gaming. Despite being a 120Hz monitor, it doesn't display a 120Hz signal from either the PS5 or the Xbox Series X|S. Additionally, fast-moving objects look blurry, so it's not a good choice for FPS and action RPG games. However, it has sharp text and vivid colors in HDR, so it works well if you plan on playing turn-based strategy or other slower games. However, because this is an ultrawide monitor, you'll have black bars on either side of your games on consoles.
- Displays a wide range of colors.
- Vivid colors in HDR.
- Fast-moving objects look blurry.
- Terrible local dimming feature.
- Highlights only pop a bit in HDR.
The Dell U4025QW works exceptionally well for office work, provided you're not in a very bright environment. It has extremely sharp text, and you can easily adjust it to your preferred position for a long work session. It also has several extra productivity features, like a KVM switch, 140W of power delivery over USB-C, and internal MST support, so you can subdivide the screen into multiple virtual monitors for easier window management. However, while it gets bright enough for most environments, it has trouble overcoming glare in very bright environments, as it doesn't get extremely bright and has distracting reflection handling.
- Bright enough to fight glare in most environments.
- Wide viewing angles.
- Good ergonomics.
- Fantastic text and image clarity.
- KVM switch and power delivery over USB-C.
Hard to see in very bright environments.
The Dell U4025QW works exceptionally well for editing, provided you're not in a very bright environment. It displays vibrant and accurate colors in HDR, apart from the darkest shades, so it's an excellent choice for editing content in HDR. Its 5k2k resolution also displays a detailed image, which is ideal for editing 4k content. Additionally, it has fantastic color accuracy before calibration, so you don't need to calibrate it for an accurate image. However, though it works well in most settings, it struggles to overcome glare in extremely bright environments.
- Bright enough to fight glare in most environments.
- Wide viewing angles.
- Good ergonomics.
- Fantastic text and image clarity.
- KVM switch and power delivery over USB-C.
- Displays a wide range of colors.
- Terrible local dimming feature.
Hard to see in very bright environments.
The Dell U4025QW has good brightness. It gets bright enough that content is easily visible in most environments, though it struggles to overcome glare in very bright situations. It also has good HDR brightness. While highlights don't pop very much, the entire monitor can get quite bright and sustain that brightness without dimming.
- Bright enough to fight glare in most environments.
- Highlights only pop a bit in HDR.
The Dell U4025QW has a terrible response time. Fast-moving objects look quite blurry, and the monitor isn't a good choice for editing fast-moving video or playing games with lots of motion, like FPSs and action RPGs.
- Fast-moving objects look blurry.
The Dell U4025QW has acceptable HDR picture quality. HDR colors look vivid, though it doesn't display darker shades as well. It also has decent contrast, which is good for an IPS display. However, while it has local dimming, it performs terribly. In some cases, it makes the image look worse, as the zones are very large, and it's quite visible which zones are turned on.
- Displays a wide range of colors.
- Vivid colors in HDR.
- Terrible local dimming feature.
The Dell U4025QW's SDR picture quality is good. While it has only adequate black uniformity, it has decent contrast, so blacks don't look as gray as many IPS displays in a dark room. Additionally, it displays a wide range of colors.
- Outstanding SDR color gamut.
- Fair black uniformity.
The Dell U4025QW has amazing accuracy. Colors are extremely accurate even before calibration, so you don't need to calibrate it for an accurate image. Additionally, while the display darkens noticeably at the edges and there's a bit of dirty screen effect, this won't be too distracting during everyday use.
- Superb color accuracy before and after calibration.
- Decent gray uniformity.
Performance Usages
Changelog
- Updated Mar 17, 2026: We've converted this review to Test Bench 2.1.2. We added a new Panel Technology box, including the Spectral Power Distribution (SPD) graph.
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Updated Feb 11, 2026:
We added that the Dell U5226KW is a similar UltraSharp model with a larger screen.
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Updated Nov 27, 2025:
We added that the ASUS ProArt Display 6K PA32QCV is another option that has better reflection handling.
- Updated Nov 10, 2025: We've converted this review to Test Bench 2.1.1. We removed the Vertical Viewing Angle test.
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Differences Between Sizes And Variants
We tested the 40-inch Dell U4025QW, which is part of the UltraSharp office and editing lineup that includes other models like the Dell U3425WE, Dell U4323QE, Dell U3824DW, and Dell U5226KW. However, these monitors are different sizes. The brand also offers the Dell UltraSharp U4021QW, which is the same size as this monitor, but it's older and has fewer USB ports. You can see the differences between the two monitors below. The results in this review are only valid for the model we tested.
| Model | Size | Resolution | Panel Type | Refresh Rate |
|---|---|---|---|---|
| U4025QW | 40" | 5120x2160 | IPS Black | 120Hz |
| U4021QW | 40" | 5120x2160 | IPS | 60Hz |
Our unit was manufactured in January 2024; you can see the label. We tested the monitor on firmware version M3T102.
Popular Monitor Comparisons
The Dell U4025QW is an outstanding choice if you want a large monitor for office or editing work and have a big budget. Its large 40-inch screen and 5k2k resolution provide a massive workspace for comparing significant amounts of information or editing photos or videos. It has several productivity features that monitors like the LG 40WP95C-W don't, like a KVM switch, which allows you to switch between sources and use the same keyboard and mouse connected to the monitor. Additionally, the U4025QW has IPS Black technology, which provides better contrast than the LG and a 120Hz refresh rate, so the screen is more responsive than the LG when scrolling through data or documents.
However, the Dell has poor motion handling, and even with its 120Hz capabilities, it isn't well suited for gaming or editing video that moves extremely quickly. If good motion handling and a large screen are important to you, consider the LG 38WN95C-W, as fast-moving objects look crisp on its display, but it's lower resolution, so text doesn't look as sharp.
See our recommendations for the best work monitors, the best monitors for photo editing, and the best ultrawide monitors.
The Dell U4025QW and the LG 40WP95C-W are very similar 40-inch ultrawide productivity and editing monitors. However, the Dell is the better monitor. The Dell has features the LG lacks, like a KVM switch and the ability to subdivide the screen into multiple smaller virtual monitors for easier window management. The Dell also has better image quality, as deep blacks look less gray in a dark room on the Dell, and its 120Hz screen provides a more responsive experience.
The Dell UltraSharp U4021QW and the Dell U4025QW are extremely similar 40-inch ultrawide productivity monitors. However, the U4025QW is a better monitor with far better image quality. With the U4025QW, deep blacks appear less gray in a dark room, colors on the display are richer and more vibrant, and it has a more responsive feel thanks to its 120Hz display. The U4021QW also doesn't allow you to subdivide the screen into multiple smaller virtual monitors for easier window management.
The Samsung Odyssey G9 C49G95T and the Dell U4025QW are different types of ultrawide monitors. They even have different aspect ratios, as the Samsung model has a wider 32:9 aspect ratio compared to the 21:9 aspect ratio of the Dell monitor. This means the Samsung has more screen space for a more immersive feel. The Samsung model is also more focused on gaming, as it has a higher refresh rate and better picture quality with HDR games. That said, the Dell is more focused on productivity, and it comes with a massive USB hub to which you can connect a variety of devices. The Dell also delivers sharper text and is more accurate for content creation.
The Dell U4025QW and the Dell U3225QE are Dell UltraSharp productivity monitors. Both have very similar feature sets and performance, though the U3225QE gets brighter, so it's a better choice for a brighter room. If you prefer an extremely large monitor, the U4025QW is a better choice, as it has a 40-inch screen. If you prefer something a bit smaller, the U3225QE is a better option, as it has a smaller 32-inch screen.
We buy and test more than 30 monitors each year, all of which we purchase ourselves, without cherry-picked units or samples. We put a lot into each unbiased, straight-to-the-point review, and there's a whole process from purchasing to publishing, involving multiple teams and people. We do more than just use the monitor for a week; we use specialized, custom tools to measure various aspects and deliver objective, data-driven results. We also consider multiple factors before making any recommendations, including the monitor's cost, its performance compared to the competition, and whether it's easy to find.
Test Results
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