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Full Piqelo Review · US market

Dell UltraSharp U4025QW

A 39.7-inch curved 5K2K 120Hz IPS Black Thunderbolt hub monitor built for high-end productivity, editing and multi-device workflows.

Size
40"
Resolution
5120x2160
Panel
IPS Black
Refresh
120Hz
USB-C 140WKVMHDMI 2.1
Piqelo Score83/100Our overall product assessment
Search Score76/100Match to your preferences

Match estimate · research ongoing

How these scores work

The Piqelo Score is our published assessment of this exact product, including value. Your search does not change it. The Search Score uses the underlying research, your preferences and comparison with similarly priced products. Value is counted once; budget and required features are hard limits.

Product score published: 2026-10-07.

The match remains an estimate while supporting research is checked. It is not a new final product score.

Price comparison: $1,072.50 to $1,787.48 (±25% of this product’s price). Comparable evidence is limited.

Find my best-fit monitor →Compare monitors
Dell UltraSharp U4025QW
Decision snapshot

Ultrawide productivity flagship

Best for: Large-data, editing and multi-window work on one premium Thunderbolt display

Think twice if: Fast competitive gaming or OLED-class HDR is the main goal

OfficeCreatorMac / USB-CMixed use
Plus points
  • 40-inch 5K2K canvas provides exceptional horizontal workspace
  • 140W Thunderbolt hub and KVM simplify complex desks
  • 120Hz improves everyday desktop fluidity
Keep in mind
  • IPS Black still lacks OLED-level black depth
  • Flagship productivity pricing is high
  • The very wide 40-inch footprint needs a large desk
At a glance

Pros and cons

The main reasons to choose it, and the compromises to weigh up.

What we like

  • 40-inch 5K2K canvas provides exceptional horizontal workspace
  • 140W Thunderbolt hub and KVM simplify complex desks
  • 120Hz improves everyday desktop fluidity

Keep in mind

  • IPS Black still lacks OLED-level black depth
  • Flagship productivity pricing is high
  • The very wide 40-inch footprint needs a large desk
Test results

Image quality, explained

Selected independent measurements, with what they mean in everyday use. Picture mode and test method matter; these results are not additional Piqelo scores.

Everyday brightness

Higher = brighter
SDR brightness
408 nits

SDR is everyday desktop content. More brightness can help in a lit room; reflections and the size of the bright area still matter.

PCWorldRead the test ↗

HDR highlights

Higher = brighter highlights
HDR brightness
635 nitsstable including full-screen
HDR brightness
635 nitsMaximum; maintained full-screen · 100% window

HDR measures bright highlights in games and video. A small-window peak is different from full-screen brightness, so check the window and mode.

One independently tested sample; lab settings and methods affect results.

PCWorldRead the test ↗

Black depth & contrast

Higher = more contrast
Contrast
2,050:1OSD brightness 50%

The ratio describes the gap between bright white and dark black. Local dimming and the test pattern can change it substantially.

PCWorldRead the test ↗

No independent measured result in this profile yet for color accuracy, color range, motion & delay, screen consistency.

Explore all findings, test settings and sources
Close alternatives

When another monitor makes more sense

Piqelo does not force one universal winner. These are the closest researched alternatives when your priorities shift.

Research & detailsSources, measurements and full specificationsHide details
Decision confidence

How stable is this recommendation?

Confidence and evidence maturity stay separate from product fit and commerce.

Recommendation stabilityHighMultiple independent sources support a high-confidence exact-model profile.
Owner evidence4.6/5Exact-model owner signal is kept separate from expert testing.
Current buying routes4Commerce never changes the recommendation order.
Product views
Dell UltraSharp U4025QW
Key specifications

The attributes that change the decision

Specs are kept separate from judgment so a fast number does not hide a practical trade-off.

Screen40"
Resolution5120x2160
PanelIPS Black
Refresh120Hz
Response5 ms GTG
HDMI 2.1Yes
USB-C power140W
KVMYes
Transparent research

Sources behind this profile

Independent expert testing, exact-model owner signals and manufacturer specifications are visibly separated. Piqelo never counts itself as product evidence.

Manufacturer specification sourceDell evidence for Dell UltraSharp U4025QW.Checked 2026-09-28Open exact source →
Independent expert sourceIndependent exact-model review highlights the sharp and vibrant 40-inch 5K2K ultrawide image, 120Hz refresh and extensive connectivity, while noting the wobbly stand, IPS contrast and HDR limits, and high price.Checked 2026-10-07Open exact source →
Independent expert sourceRTINGS evidence for Dell UltraSharp U4025QW.Checked 2026-09-28Open exact source →
Independent expert sourceExact-model 40-inch curved Thunderbolt hub review adds a separate productivity assessment. Differently sized UltraSharp results are not transferred.Checked 2026-09-30Open exact source →

Exact-model findings and measurements

Supported finding · connectivity docking

PCWorld praises the extensive connectivity and 120Hz 5K2K ultrawide workspace.

PCWorld Open exact source →
Supported finding · sdr image

PCWorld measured maximum SDR brightness of 408 nits and contrast of 2,050:1 at 50% brightness. These measurements apply to the 40-inch U4025QW, not smaller UltraSharp models.

SDR brightness
408 nits
Contrast
2,050:1OSD brightness 50%
PCWorld Open exact source →
Trade-off · hdr image

Measured HDR brightness reached 635 nits and remained stable full-screen. Limited backlight control and native contrast still produced grey shadows in high-contrast HDR scenes; HDR support alone does not establish strong HDR quality.

HDR brightness
635 nitsstable including full-screen
PCWorld Open exact source →
Supported finding · color

PCWorld measured 100% sRGB, 96% DCI-P3, 95% Adobe RGB gamut coverage.

color gamut coverage
100%Tested native mode · sRGB
color gamut coverage
96%Tested native mode · DCI-P3
color gamut coverage
95%Tested native mode · Adobe RGB

Coverage is distinct from gamut volume and does not establish color accuracy.

PCWorld Open exact source →
Supported finding · hdr image

PCWorld measured HDR 635 nits (Maximum; maintained full-screen).

HDR brightness
635 nitsMaximum; maintained full-screen · 100% window

One independently tested sample; lab settings and methods affect results.

PCWorld Open exact source →
Next steps

Put this monitor in context

Independent test resultsBrightness, color and motion, with exact test settings →Best Monitors researchExplore the full research set →Best Ultrawide Monitors 2026Explore monitors matching this specification →USB-C Monitors with Power Delivery, KVM & Two Screens | PiqeloExplore monitors matching this specification →Best Monitors for MacBook Pro & Air 2026 | PiqeloExplore monitors matching this specification →Compare this exact monitorChoose a second monitor →
Trust & transparencyIndependent by design.

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