The Dell UltraSharp 52 (model U5226KW) is a 51.5-inch, 6K, curved ultrawide monitor with a built-in Thunderbolt 4 dock. Dell sells it as one screen that does the job of two: a single cable carries the picture, 140W of laptop charging, and 2.5-gigabit ethernet. In MKBHD's 2026 display round-up he called it the most interesting display Dell shipped this year, and the first ultrawide he would actually use instead of two monitors.
Specs
| Spec | Detail |
|---|---|
| Model | UltraSharp 52 Thunderbolt Hub Monitor (U5226KW) |
| Panel | IPS Black |
| Size | 51.5 inch (52 class), curved ultrawide |
| Resolution | 6144 x 2560 (6K), 21:9, about 129 PPI |
| Curve | 4200R |
| Refresh | 120 Hz |
| Brightness | 400 nits |
| Contrast | 2000:1 native |
| Colour | 100% sRGB, 100% BT.709, 99% DCI-P3 / Display P3 |
| HDR | No HDR certification; reviewers note it lacks real HDR |
| Connectivity | 1x Thunderbolt 4 upstream (140W power delivery), 2x DisplayPort 1.4, 2x HDMI, USB-A/USB-C hub, 2.5GbE RJ45 |
| Extras | KVM switch, 2x 9W speakers |
| Stand | Height, tilt, swivel (no pivot) |
| Price | About $2,300 to $2,900 in the US (see Price below) |
Why it is interesting
MKBHD's point is that this is the first single ultrawide that replaces a dual-monitor setup without a catch.
- 6K density. At 6144 x 2560 across 52 inches it lands at about 129 PPI, the same sharpness as a 27-inch 4K panel, so text stays clean rather than blown up.
- The slight curve. The gentle 4200R curve pulls the far edges back toward you, so you turn your head less across that width.
- One-cable dock. A single Thunderbolt 4 cable handles video, 140W charging, 2.5GbE, the USB hub, and a KVM. Plug the laptop in and the whole desk comes alive. In MKBHD's words, "one display to rule them all."
- Two displays in one. It costs about what two high-end panels cost, but it is two panels' worth of screen with no bezel down the middle.
How it compares
| Monitor | Size / curve | Resolution | Notes |
|---|---|---|---|
| Dell UltraSharp 52 U5226KW | 52" ultrawide, 4200R | 6144 x 2560 (6K), 120 Hz | The dual-monitor replacement; TB4 140W dock + KVM |
| Dell UltraSharp 40 U4025QW | 40" ultrawide, curved | 5120 x 2160 (5K2K), 120 Hz | Smaller, cheaper, also a Thunderbolt hub |
| Two 27" 4K panels | two screens | 3840 x 2160 each | The setup the 52 aims to replace; bezel in the middle |
Pros and cons
- Good: a genuine dual-monitor replacement with no centre bezel; sharp 6K text density; one-cable Thunderbolt 4 docking with 140W, 2.5GbE and KVM; 120 Hz; IPS Black for deeper blacks than standard IPS.
- Less good: expensive; no real HDR and only 400 nits, so it is an SDR work panel, not a media or gaming display; 21:9, not the wider 32:9 super-ultrawide; no pivot; it needs a deep desk; not yet listed on Dell.de at the time of writing.
Who it is for
Desk power users who already run two monitors and want one clean panel instead: developers, traders, editors, anyone living in wide spreadsheets or video timelines. It is not the pick for HDR movies or gaming.
Price and where to buy
- US: roughly $2,300 to $2,900. Dell lists it around $2,299.99 without the stand, while review units are cited near $2,899.99 configured. Buy from the official Dell product page.
- Germany / Europe: not yet listed on Dell.de when this note was written. Expect roughly 3,000 EUR or more once VAT is added; check Dell.de and the usual German retailers.
My take
This is the first ultrawide that actually solves the dual-monitor problem rather than just being big. The single Thunderbolt cable doing video, charging, ethernet and KVM is the real story for a laptop-on-a-desk setup like mine. The catch is honest: no HDR and 400 nits mean it is a work tool, not a movie screen, and the price is two monitors' worth. If the desk is deep enough and the work is wide, it is the one to watch.
Further reading
- MKBHD round-up: The Most Interesting Displays In The World!
- Official: Dell UltraSharp 52 U5226KW
- Reviews: RTINGS and StorageReview