Dell UltraSharp U4025QW 40" 5K2K Curved Thunderbolt 4 Monitor
Dell
Dell UltraSharp U4025QW 40" 5K2K Curved Thunderbolt 4 Monitor
The Dell UltraSharp U4025QW is a 40-inch 5K2K curved monitor built for professionals who demand colour accuracy and screen real estate. It combines a 120 Hz IPS Black panel with 100% Rec 709 and sRGB coverage, Thunderbolt 4 connectivity, and a KVM switch, making it ideal for designers, video editors, and multi-monitor workflows.
Why this product
5K2K ultrawide at 120 Hz
The 5120 × 2160 resolution across a 40-inch 21:9 curved display delivers 140 pixels per inch and 1.07 billion colours, with a 120 Hz refresh rate that reduces flicker on scrolling and motion.
Factory-calibrated colour accuracy
100% Rec 709, 100% sRGB, and 98% DCI-P3 coverage with Delta E < 2 average ensure that colour-critical work—photography, video grading, design—matches your intent.
Thunderbolt 4 with 140W power delivery
A single Thunderbolt 4 port delivers video, data, and up to 140W of charging power, plus a built-in USB hub and KVM switch simplify connecting and switching between systems.
Curved IPS Black panel with HDR
The 2500R curve, 2000:1 contrast ratio, and VESA DisplayHDR 600 certification with 600 cd/m² peak brightness deliver deep blacks and immersive image depth.
Fully adjustable ergonomic stand
Height (150 mm), tilt, and swivel adjustment accommodate different desk heights and viewing angles, reducing neck and eye strain during long work sessions.
- Screen Size40" (39.7" viewable)
- Resolution5120 × 2160 (5K2K) at 120 Hz
- Aspect Ratio21:9 ultrawide
- Panel TypeIPS Black Technology
- Colour Gamut100% sRGB, 100% Rec 709, 98% DCI-P3
- HDRVESA DisplayHDR 600 (600 cd/m² peak)
- Primary InputThunderbolt 4 (140W power delivery)
- Warranty3-year Advanced Exchange & Panel Exchange
- SKUDEL-1635
- EAN5397184821510
- Works with any system via HDMI 2.1, DisplayPort 1.4, or Thunderbolt 4; Thunderbolt 4 is required to use the full 140W power delivery.
- The built-in KVM switch allows control of multiple computers from a single keyboard and mouse, with daisy-chaining support via the downstream Thunderbolt 4 port.
- Supports Picture-by-Picture and Picture-in-Picture modes for simultaneous display of two input sources.
- 2.5GbE Ethernet port and built-in 9W speakers eliminate the need for separate audio or network connections.
- Requires USB Type-C or Thunderbolt 4 on your device to use the upstream USB hub and power delivery; older systems can connect via HDMI or DisplayPort only, without hub access.
Best for
- Video editors and colour graders needing high resolution, accurate colour science, and smooth 120 Hz playback on a single ultrawide display.
- Graphic designers and photographers working with detailed imagery; 140 PPI and factory calibration reduce errors and rework.
- Multi-tasking professionals who work across applications; the 21:9 format replaces two monitors and the KVM switch handles multiple computers.
- Thunderbolt 3 and 4 device users who need a single-cable solution for video, power (up to 140W), and a USB hub.
Trade-offs
- Budget-conscious buyers: This is a premium professional monitor; entry-level and mid-range options offer lower resolution or colour accuracy at substantially lower cost.
- Gaming-focused users: While it supports 120 Hz, the 8 ms typical response time and professional colour calibration are optimised for productivity, not competitive gaming.
- Compact desk setups: At 37.27 inches wide and 26.94 lbs with stand, it requires significant desk space and a sturdy mount or arm.
- Users needing mobile or portable displays: The large curved panel and weight make travel or frequent repositioning impractical.
The Dell UltraSharp U4025QW monitor redefines the standards of visual excellence and ergonomic design, catering to professionals who refuse to compromise on quality and comfort. With its 40-inch 5K2K UltraWide curved display, it offers an immersive viewing experience, making every detail come alive with over 1.07 billion colors. The monitor's exceptional color accuracy, with 100% Rec 709, 100% sRGB, and 98% DCI-P3 coverage, ensures that your projects reflect true-to-life colors, essential for graphic designers, video editors, and photographers seeking precision in their work.
Connectivity is a breeze with Thunderbolt 4, HDMI, and DisplayPort inputs, alongside a built-in KVM switch and USB-C hub, facilitating seamless multitasking and device integration. The ergonomic design, featuring adjustable height, swivel, and tilt, alongside a bezel-less design, maximizes comfort and screen real estate, making it perfect for multi-monitor setups.
Display
| Brand | Dell |
|---|---|
| Model | UltraSharp U4025QW |
| Screen Size | 40" diagonal (39.7" viewable) / 100.8 cm |
| Resolution | WUHD 5120 × 2160 (5K2K) |
| Refresh Rate | 48–120 Hz |
| Aspect Ratio | 21:9 |
| Curvature | 2500R |
| Panel Type | IPS Black Technology |
| Brightness (Typical) | 450 cd/m² |
| Brightness (HDR Peak) | 600 cd/m² |
| Contrast Ratio | 2000:1 (typical) |
| Response Time (Normal) | 8 ms |
| Response Time (Fast) | 5 ms |
| Viewing Angles | 178° vertical / 178° horizontal |
| Pixel Pitch | 0.1815 × 0.1815 mm |
| Pixels Per Inch | 140 PPI |
| Colour Depth | 1.07 billion colours (8-bit + A-FRC) |
| Screen Coating | Anti-glare, 3H hardness |
| Backlight | LED Edgelight |
Colour & HDR
| sRGB Coverage | 100% |
|---|---|
| Rec 709 Coverage | 100% |
| DCI-P3 Coverage | 98% |
| Display P3 Coverage | 99% |
| Delta E (Average) | < 2 |
| HDR Standard | VESA DisplayHDR 600 |
Connectivity & Hub
| Thunderbolt 4 (Upstream) | 1x with 140W EPR power delivery, DisplayPort 1.4 Alternate Mode, USB 3.2 Gen2 |
|---|---|
| Thunderbolt 4 (Downstream) | 1x for daisy-chaining (15W) |
| HDMI | 1x HDMI 2.1 (5K2K 120 Hz, HDR, VRR) |
| DisplayPort | 1x DP 1.4 (HDCP 2.3, 5K2K 120 Hz, DSC) |
| USB Type-A Downstream | 4x USB 3.2 Gen2 (10 Gbps); 1x with BC1.2 quick charging |
| USB Type-C Downstream | 2x USB 3.2 Gen2 with 15W power charging |
| USB Type-C Upstream (Data) | 1x USB 3.2 Gen2 (10 Gbps) |
| Ethernet | 1x RJ45 2.5GbE |
| Audio Line-Out | 3.5 mm jack |
| KVM Switch | Yes, built-in |
Audio & Features
| Built-in Speakers | 2x 9W |
|---|---|
| Daisy-Chaining | Yes |
| Picture-by-Picture / Picture-in-Picture | Yes |
| Ambient Light Sensor | Yes (auto brightness and colour temperature) |
Adjustability & Mounting
| Height Adjustment | 150 mm |
|---|---|
| Tilt Range | -5° to +21° |
| Swivel Range | -30° to +30° |
| VESA Mount | 100 × 100 mm (behind attached cover) |
Physical & Environment
| Width (with stand) | 37.27 inches (94.7 cm) |
|---|---|
| Height (with stand) | 16.5 inches (41.9 cm) |
| Depth | 4.25 inches (10.8 cm) |
| Weight (panel only) | 18.41 lbs (8.4 kg) |
| Weight (with stand and cables) | 26.94 lbs (12.2 kg) |
| Operating Temperature | 32°F to 104°F (0°C to 40°C) |
| Operating Humidity | 10% to 80% (non-condensing) |
| Security | Security lock slot (cable lock sold separately); anti-theft stand lock slot |
Warranty & Support
| Warranty | 3-year Advanced Exchange Service and Premium Panel Exchange |
|---|
Shipping
All our products are shipped from the United Kingdom within 24 to 48 hours of purchase. See our Shipping and Returns page for full details.
Returns
- Tech Syndicate offers a full money-back guarantee on all purchases made in our store. If you are not satisfied with your purchase, we will provide a full refund, no questions asked.
- Refunds are available within 45 days of delivery.
- After the 45-day period you are no longer eligible for a refund, so we encourage you to try the product within the first few weeks to make sure it fits your needs.