Dell UltraSharp 40 Curved Thunderbolt Hub Monitor

Where to buy

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Pros

5120x2160 IPS Black panel, ~2,000:1 contrast, 99% DCI-P3, factory calibrated
120 Hz with VRR, rare in a productivity ultrawide
Full Thunderbolt 4 hub: 140 W power delivery, daisy-chain, 2.5GbE, built-in KVM for two computers
Fully ergonomic stand and a huge port selection

Cons

Expensive; street price rarely dips under ~US$1,500
HDR is weak for the money (edge-lit, DisplayHDR 600)
IPS glow in dark scenes
~27 lb with stand; needs a capable GPU/Thunderbolt host for 5K2K at 120 Hz

Why it is on the owner's desk

One 5K2K panel for a call, a spreadsheet and a dashboard side by side; its Thunderbolt hub replaced a separate dock. The question it answers for a buyer: Why one large display instead of two monitors?

From the owner · T.R.
“Third ultrawide in three years: an LG 38WP85C-W (refurbished, Jan 2024), then an LG 34-inch that went back under support, then this. The upgrade looked incremental on paper but compounded: 120 Hz, double the contrast, 450 vs 300 nits, and the hub/KVM let me retire a dock. I run it at 2560x1080 HiDPI because it maps 2:1 to the native panel, which is the sharpest option for dense spreadsheets. One gotcha: daisy-chaining the P1425 dropped the Dell to 60 Hz until I set OSD > Display > Thunderbolt Daisy Chain > Optimized.”

Specs that matter

39.7-inch 2500R IPS Black, 5120x2160, 120 Hz, 21:9
450 nits SDR / 600 nits HDR, 99% DCI-P3
2x Thunderbolt 4 (140 W upstream), HDMI 2.1, DP 1.4
5x USB-A, 2x USB-C, 2.5GbE, KVM
26.9 lb with stand; 3-year warranty

Alternatives weighed

Ergotron HX monitor arm (researched): the LX is rated to 34-inch panels; the HX is rated to 42 lb and built for large curved ultrawides
LG 38WP85C-W (previously owned, refurbished C$1,299.99 in Jan 2024): 38-inch 3840x1600, no KVM; fine if found cheap
34-inch WQHD ultrawide (researched): most of the productivity benefit for a third of the price

Check before ordering

Desk depth for a 40-inch 2500R curve; a Thunderbolt 4 or 5 host; whether you will actually use the KVM

Receipt on file: C$2,899.99, Dell.ca, 2026-09-18 (Dell price vs C$3,299.99 list). Purchased by Direct To Growth Co. Inc.; receipts are kept in the product registry, not published.

Sources checked

Corrections and updates

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