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- UltraFine 40U990A vs VP2786A-4K
LG UltraFine 40U990A vs ViewSonic VP2786A-4K
What UltraFine 40U990A does better (4) and where VP2786A-4K wins (2) — every spec side by side.
vs
9.1Screen7.4
8.6Connectivity6.5
2.8Design & ergonomics5.6
Dimensions
Size comparison
UltraFine 40U990AVP2786A-4K
| UltraFine 40U990A | VP2786A-4K | Difference | |
|---|---|---|---|
| Height | 614 mm | 449.1 mm | +164.9 mm |
| Width | 948 mm | 613 mm | +335 mm |
| Depth | 260 mm | 232 mm | +28 mm |
| Weight | 14.1 kg | 8.3 kg | +5.8 kg |
Drawn to the same scale from the official dimensions (front and side).
Why is UltraFine 40U990A better than VP2786A-4K?
- Brightness (typical)450 nits vs 350 nits+29%
- USB-C charging (Power Delivery)96 W vs 90 W+7%
- Contrast ratio (static)2,000:1 vs 1,300:1+54%
- Screen size39.7″ vs 27″+47%
Why is VP2786A-4K better than UltraFine 40U990A?
- Pixel density140 ppi vs 163 ppi+16%
- Weight14.1 kg vs 8.3 kg+70%
Specifications
Side by side
| Display | ||
| Screen size | 39.7″ | 27″ |
| Resolution | 5120 × 2160 | 3840 × 2160 |
| Resolution class | 5K | 4K UHD |
| Pixel density | 140 ppi | 163 ppi |
| Aspect ratio | 21:9 | 16:9 |
| Panel type | IPS | IPS |
| Refresh rate | 120 Hz | — |
| Brightness (typical) | 450 nits | 350 nits |
| Contrast ratio (static) | 2,000:1 | 1,300:1 |
| Response time | 5 ms | 5 ms |
| Anti-glare / matte screen | Yes | Yes |
| Curved screen | Yes | — |
| Colour | ||
| Adobe RGB coverage | — | 100% |
| DCI-P3 coverage | 99% | 98% |
| Colour accuracy (ΔE, claimed) | — | ΔE 2 |
| Colour depth | — | 10 bit |
| Hardware calibration | — | Yes |
| Factory calibrated (report) | — | Yes |
| HDR | DisplayHDR 600 | — |
| Uniformity compensation | — | Yes |
| Connectivity | ||
| USB-C video input (one cable) | Yes | Yes |
| USB-C charging (Power Delivery) | 96 W | 90 W |
| Thunderbolt | Yes | — |
| KVM switch | Yes | — |
| HDMI inputs | 2 | 2 |
| DisplayPort inputs | 1 | 1 |
| USB hub | Yes | — |
| Built-in speakers | Yes | Yes |
| Design & ergonomics | ||
| Height adjustment | 130 mm | 130 mm |
| Pivot (portrait rotation) | — | Yes |
| Swivel | Yes | Yes |
| Weight | 14.1 kg | 8.3 kg |
| Width | 948 mm | 613 mm |
| Height | 614 mm | 449 mm |
| Depth | 260 mm | 232 mm |
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