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- UltraSharp U4021QW vs UltraFine 40U990A
Dell UltraSharp U4021QW vs LG UltraFine 40U990A
What UltraSharp U4021QW does better (0) and where UltraFine 40U990A wins (5) — every spec side by side.
vs
4.0Screen9.1
7.9Connectivity8.6
2.3Design & ergonomics2.8
Why is UltraSharp U4021QW better than UltraFine 40U990A?
UltraSharp U4021QW has no measurable advantages in this pair.
Why is UltraFine 40U990A better than UltraSharp U4021QW?
- Brightness (typical)300 nits vs 450 nits+50%
- Refresh rate60 Hz vs 120 Hz2×
- Contrast ratio (static)1,000:1 vs 2,000:12×
- Response time8 ms vs 5 ms+60%
- Height adjustment120 mm vs 130 mm+8%
Specifications
Side by side
| Display | ||
| Screen size | 40″ | 39.7″ |
| Resolution | 5120 × 2160 | 5120 × 2160 |
| Resolution class | 5K | 5K |
| Pixel density | 140 ppi | 140 ppi |
| Aspect ratio | 21:9 | 21:9 |
| Panel type | IPS | IPS |
| Refresh rate | 60 Hz | 120 Hz |
| Brightness (typical) | 300 nits | 450 nits |
| Contrast ratio (static) | 1,000:1 | 2,000:1 |
| Response time | 8 ms | 5 ms |
| Anti-glare / matte screen | Yes | Yes |
| Curved screen | Yes | Yes |
| Colour | ||
| sRGB coverage | 100% | — |
| DCI-P3 coverage | — | 99% |
| Colour depth | 10 bit | — |
| HDR | — | DisplayHDR 600 |
| Connectivity | ||
| USB-C video input (one cable) | — | Yes |
| USB-C charging (Power Delivery) | — | 96 W |
| Thunderbolt | — | Yes |
| KVM switch | — | Yes |
| HDMI inputs | 2 | 2 |
| DisplayPort inputs | 1 | 1 |
| USB hub | Yes | Yes |
| Ethernet (RJ45) | Yes | — |
| Built-in speakers | — | Yes |
| Design & ergonomics | ||
| Height adjustment | 120 mm | 130 mm |
| Pivot (portrait rotation) | No | — |
| Swivel | Yes | Yes |
| VESA mount | 100 × 100 mm | — |
| Weight | — | 14.1 kg |
| Width | — | 948 mm |
| Height | — | 614 mm |
| Depth | — | 260 mm |
| Product line | Dell UltraSharp | — |
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