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  3. UltraFine 27UP650K vs UltraFine 27US550

LG UltraFine 27UP650K vs LG UltraFine 27US550

What UltraFine 27UP650K does better (4) and where UltraFine 27US550 wins (2) — every spec side by side.

LG UltraFine 27UP650K
LG · 2025UltraFine 27UP650K
4.0Score
4 advantages≈ $210
vs
LG UltraFine 27US550
LG · 2025UltraFine 27US550
5.5Score
2 advantages≈ $190
Higher score
7.6Screen5.4
5.4Colour accuracy3.3
2.0Design & ergonomics6.8

Why is UltraFine 27UP650K better than UltraFine 27US550?

  1. Brightness (typical)400 nits vs 300 nits+33%
  2. HDRDisplayHDR 400 vs HDR10
  3. DCI-P3 coverage95% vs 90%+6%
  4. Contrast ratio (static)1,200:1 vs 1,000:1+20%

Why is UltraFine 27US550 better than UltraFine 27UP650K?

  1. Pivot (portrait rotation)No · UltraFine 27UP650K: Yes
  2. SwivelNo · UltraFine 27UP650K: Yes
Specifications

Side by side

LG UltraFine 27UP650KLG UltraFine 27UP650K≈ $2104.0
LG UltraFine 27US550LG UltraFine 27US550≈ $1905.5
Display
Screen size27″27″
Resolution3840 × 21603840 × 2160
Resolution class4K UHD4K UHD
Pixel density163 ppi163 ppi
Aspect ratio16:916:9
Panel typeIPSIPS
Refresh rate60 Hz60 Hz
Brightness (typical)400 nits300 nits
Contrast ratio (static)1,200:11,000:1
Response time5 ms5 ms
Anti-glare / matte screenYesYes
Colour
DCI-P3 coverage95%90%
Colour depth10 bit10 bit
HDRDisplayHDR 400HDR10
Connectivity
HDMI inputs22
DisplayPort inputs11
Built-in webcam—Yes
Design & ergonomics
Pivot (portrait rotation)NoYes
SwivelNoYes
VESA mount100 × 100 mm100 × 100 mm
Product lineLG UltraFineLG UltraFine

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