LG UltraGear 27GX790B-B 27" Black 2026
The 27-inch QHD OLED panel pushes a 540Hz refresh rate with a 0.02ms response time, eliminating motion blur for ultra-smooth competitive play. Its Dual Mode instantly switches to 720Hz at 1080p, and Primary RGB Tandem tech boosts brightness to 335 nits for vivid HDR while DisplayPort 2.1 supports the extreme bandwidth. This monitor is best for esports competitors who toggle between sharp 1440p detail and 720Hz speed for split-second reactions.
Screen 27
Resolution 2560 x 1440
Panel OLED
Refresh 540 Hz
adaptive sync FreeSync Premium Pro
HDR DisplayHDR True Black 500
65 Overall Score
Price MX$0
No listings available
Snapshot
Pros & Cons
Pros
- Strong ergonomic (90th percentile) 90th
- Strong color (88th percentile) 88th
- Strong connectivity (82th percentile) 82th
- Strong display (77th percentile) 77th
Cons
- Below average user sentiment (4th percentile)
- Below average social proof (16th percentile)
What owners think
How owner sentiment changed over time
ExclusiveBased on when customers actually wrote their reviews — so you can see whether early praise held up.
50/100Our AI sentiment read
The proof
Performance
Specifications
Full Specifications
Display
| Size | 27" |
| Resolution | 2560 (QHD) |
| Panel Type | OLED |
| Aspect Ratio | 16:9 |
| Curved | No |
Performance
| Refresh Rate | 540 Hz |
| Adaptive Sync | FreeSync Premium Pro |
Color & HDR
| Brightness | 335 nits |
| Color Gamut | DCI-P3 99.5% |
| Color Depth | 10-bit |
| HDR | DisplayHDR True Black 500 |
| HDR Support | HDR10 |
Connectivity
| HDMI Ports | 2 |
| DisplayPort | 1 |
| USB-C | 1 |
| Speakers | No |
| Headphone Jack | Yes |
Ergonomics
| Height Adjustable | Yes |
| Tilt | Yes |
| Swivel | Yes |
| Pivot | Yes |
| VESA Mount | 100x100 |
Features
| Webcam | No |
| Touchscreen | No |
| Weight | 6.8 kg / 15.0 lbs |
vs Competition
| Spec | LG UltraGear 27GX790B-B 27" | ASUS ROG Strix XG27AQDMG | MSI MPG MPG 271QRX QD-OLED | Samsung Odyssey Neo G9 G95NC | Dell UltraSharp U4025QW | Alienware AW-Series AW3425DW |
|---|---|---|---|---|---|---|
| Screen Size | 27 | 26.5 | 27 | 57 | 39.70000076293945 | 34 |
| Resolution | 2560 x 1440 | 2560 x 1440 | 2560 x 1440 | 7680 x 2160 | 5120 x 2160 | 3440x1440 |
| Panel Type | OLED | OLED | QD-OLED | VA | IPS | QD-OLED |
| Refresh Rate | 540 | 240 | 360 | 240 | 120 | 240 |
| Response Time Ms | - | 0.029999999329447746 | 0.029999999329447746 | 1 | 5 | 0.029999999329447746 |
| Adaptive Sync | FreeSync Premium Pro | FreeSync Premium Pro | FreeSync Premium Pro | FreeSync Premium Pro | Adaptive-Sync | FreeSync Premium Pro |
| Hdr | DisplayHDR True Black 500 | HDR10 | DisplayHDR True Black 400 | HDR10+ | DisplayHDR 600 | DisplayHDR 400 True Black |
| Compare | Compare | Compare | Compare | Compare |
| Product | Color | Compact | Display | Feature | User Sentiment | Ergonomic | Performance | Connectivity | Social Proof |
|---|---|---|---|---|---|---|---|---|---|
| LG UltraGear 27GX790B-B 27" | 87.8 | 63.9 | 76.6 | 72.4 | 3.8 | 90.4 | 70.3 | 82.2 | 15.8 |
| ASUS ROG Strix XG27AQDMG Compare | 96.4 | 73.9 | 75.7 | 72.4 | 95.8 | 90.4 | 97.9 | 93.1 | 86 |
| MSI MPG MPG 271QRX QD-OLED Compare | 98.9 | 63.9 | 76.6 | 72.4 | 99.1 | 90.4 | 99.5 | 82.2 | 99.5 |
| Samsung Odyssey Neo G9 G95NC Compare | 99.4 | 32.1 | 99.7 | 97.3 | 0 | 72.1 | 87.6 | 93.1 | 95.6 |
| Dell UltraSharp U4025QW Compare | 97.5 | 82.4 | 98.4 | 97.3 | 75.6 | 72.1 | 56.2 | 99.3 | 98.4 |
| Alienware AW-Series AW3425DW Compare | 98.3 | 79.9 | 85.5 | 91.8 | 0 | 90.4 | 97.9 | 95.3 | 95.6 |
Usage Scores
A full written review is coming soon. The specs, scores, prices and charts above are always up to date.
