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LG 27UL550-W 27-inch 4K UHD (3840 x 2160) Ultrafine Computer Monitor, IPS, AMD FreeSync, Tilt/Height/Pivot Adjustable Stand, HDR10, HDMI, DisplayPort, Black Stabilizer, White

LG 27UL550-W 27-inch 4K UHD (3840 x 2160) Ultrafine Computer Monitor

Bottom line: The LG 27UL550-W 27-inch 4K UHD Ultrafine Computer Monitor: 4K UHD 3840x2160 IPS panel, 4x Full HD resolution; main trade-off: connects via HDMI and DisplayPort only, no USB-C.

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By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For gaming and productivity monitors, synthesises manufacturer specs against measured monitor reviews (RTINGS, Monitors Unboxed) rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference. How we check display specs →

Pros & Cons

Pros

  • ✓ 4K UHD 3840x2160 IPS panel, 4x Full HD resolution
  • ✓ 98% sRGB gamut with 1.07 billion colors
  • ✓ HDR10 compatible for brighter highlight detail
  • ✓ AMD Radeon FreeSync reduces tearing in games
  • ✓ Height, pivot, and tilt adjustable stand

Cons

  • ✗ Connects via HDMI and DisplayPort only, no USB-C
  • ✗ 300 cd/m2 typical brightness limits true HDR punch
  • ✗ 1000:1 typical contrast, blacks trail VA and OLED
  • ✗ 27-inch 4K needs OS scaling for readable text

Manufacturer description

LG 27UL550-W 27 inch 4K UHD IPS LED HDR monitor with Radeon free Sync technology and HDR 10

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SpecPicks Verdict

SpecPicks scored LG 27UL550-W 27-inch 4K UHD (3840 x 2160) Ultrafine Computer… using a rating × review-volume × price-fit model applied to our editorial and benchmark analysis across the gaming monitors category. Compare with similarly-priced alternatives in the gaming monitors category before committing. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for gaming monitors of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

  • UltraFine 4K Display (3840x2160) presents four times the resolution of Full HD with HDR 10’s industry standard for High Dynamic Range imaging.
  • Srgb 98% Color gamut. Brightness - 300cd (typ) / 240cd (Min). Pixel Pitch(mm) - 0.1554 x 0.1554 mm. Color Depth(Number of Colors) - 1.07B. Viewing Angle - 178º(R/L), 178º(U/D)
  • Hdr 10 Compatible. Image contrast ratio is 700:1 (Min.), 1000:1 (Typ.)
  • Radeon free Sync technology
  • Height/ pivot/ tilt adjustable stand

Full Specifications

BrandLG
ColorSilver
ShapeFlat
Voltage240 volts
Brightness400 candela_per_square_meter
Model Name27UL550-W
Resolution4K UHD 2160p
Color Gamut0.98
Pixel Pitch0.16
Screen Size27 inches
Aspect Ratio16:9
Display TypeLED
Model Number27UL550-W
Refresh Rate60 hertz
Adaptive SyncFreeSync
Mounting TypeWall Mount
Response Time5 milliseconds
Screen FinishGlossy
Viewing Angle178 degrees
Built-In MediaHDMI, DisplayPort
Full listing titleLG 27UL550-W 27-inch 4K UHD (3840 x 2160) Ultrafine Computer Monitor, IPS, AMD FreeSync, Tilt/Height/Pivot Adjustable Stand, HDR10, HDMI, DisplayPort, Black Stabilizer, White

Ready to buy?

LG 27UL550-W 27-inch 4K UHD (3840 x 2160) Ultrafine Computer Monitor, IPS, AMD FreeSync, Tilt/Height/Pivot Adjustable Stand, HDR10, HDMI, DisplayPort, Black Stabilizer, White is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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LG 27UL550-W 27-inch 4K UHD (3840 x 2160) Ultrafine Computer Monitor, IPS, AMD FreeSync, Tilt/Height/Pivot Adjustable Stand, HDR10, HDMI, DisplayPort, Black Stabilizer, White
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