How we score Blog Advertise
  1. opendesign.foundation
  2. Compare
  3. ColorEdge CG3100X vs UltraFine 40U990A

EIZO ColorEdge CG3100X vs LG UltraFine 40U990A

What ColorEdge CG3100X does better (4) and where UltraFine 40U990A wins (7) — every spec side by side.

EIZO ColorEdge CG3100X
EIZO · 2025ColorEdge CG3100X
7.6Score
4 advantages≈ $4,600
vs
LG UltraFine 40U990A
7.6Score
7 advantages≈ $1,550
Higher score
7.9Screen9.1
5.5Connectivity8.6
5.7Design & ergonomics2.8
Dimensions

Size comparison

ColorEdge CG3100XUltraFine 40U990A
721 × 428.1290948 × 614260
ColorEdge CG3100XUltraFine 40U990ADifference
Height428.1 mm614 mm−185.9 mm
Width721 mm948 mm−227 mm
Depth290 mm260 mm+30 mm
Weight12.3 kg14.1 kg−1.8 kg

Drawn to the same scale from the official dimensions (front and side).

Why is ColorEdge CG3100X better than UltraFine 40U990A?

  1. Pixel density152 ppi vs 140 ppi+9%
  2. Brightness (typical)500 nits vs 450 nits+11%
  3. Height adjustment155 mm vs 130 mm+19%
  4. Weight12.3 kg vs 14.1 kg+15%

Why is UltraFine 40U990A better than ColorEdge CG3100X?

  1. Response time15 ms vs 5 ms3×
  2. HDRHDR10 vs DisplayHDR 600
  3. HDMI inputs1 vs 22×
  4. Refresh rate61 Hz vs 120 Hz+97%
  5. USB-C charging (Power Delivery)94 W vs 96 W+2%
  6. Screen size30.5″ vs 39.7″+30%
  7. Contrast ratio (static)1,800:1 vs 2,000:1+11%
Specifications

Side by side

Display
Screen size30.5″39.7″
Resolution4096 × 21605120 × 2160
Resolution class4K UHD5K
Pixel density152 ppi140 ppi
Aspect ratio17:921:9
Panel typeIPSIPS
Refresh rate61 Hz120 Hz
Brightness (typical)500 nits450 nits
Contrast ratio (static)1,800:12,000:1
Response time15 ms5 ms
Anti-glare / matte screenYesYes
Curved screen—Yes
Colour
Adobe RGB coverage97%—
DCI-P3 coverage99%99%
Colour depth10 bit—
Hardware calibrationYes—
Built-in calibration sensorYes—
HDRHDR10DisplayHDR 600
Uniformity compensationYes—
Connectivity
USB-C video input (one cable)YesYes
USB-C charging (Power Delivery)94 W96 W
Thunderbolt—Yes
KVM switch—Yes
HDMI inputs12
DisplayPort inputs11
USB hubYesYes
Built-in speakersNoYes
Design & ergonomics
Height adjustment155 mm130 mm
SwivelYesYes
VESA mount100 × 100 mm—
Weight12.3 kg14.1 kg
Width721 mm948 mm
Height428 mm614 mm
Depth290 mm260 mm
To compare: 0up to 4 models
Compare