Between the M27Q X and UltraGear 27GX790A-B, the M27Q X comes out ahead in screen size, while the UltraGear 27GX790A-B wins on usb-c power delivery and peak brightness. Overall, the M27Q X scores 65.7 and the UltraGear 27GX790A-B scores 72.6 on our Mars Score.
Which should you buy?
The UltraGear 27GX790A-B edges ahead on the Mars Score (65.7 vs 72.6), but the 6.9-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the M27Q X if the display is what you stare at all day — refresh rate, brightness, or sharpness is where the difference will be most visible. The biggest gaps in its favor are screen size.
Pick the UltraGear 27GX790A-B if the display is what you stare at all day — refresh rate, brightness, or sharpness is where the difference will be most visible. Its strongest claims are usb-c power delivery, peak brightness, refresh rate, among others.
Both ship with comparable g-sync, freesync, so those specs don't separate the two — focus on the differences below.
Bottom line: the UltraGear 27GX790A-B is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Gigabyte - M27Q X wins
- ▲Screen size — 1.89% more. 27 " vs 26.5 ".
Why LG - UltraGear 27GX790A-B wins
- ▲USB-C Power Delivery — 333.33% more. 65 W vs 15 W.
- ▲Peak brightness — 225.00% more. 1300 nits vs 400 nits.
- ▲Refresh rate — 100.00% more. 480 Hz vs 240 Hz.
- ▲Response time (GtG) — 90.00% less. 0.03 ms vs 0.3 ms.
- ▲DCI-P3 coverage — 7.07% more. 98.5 % vs 92 %.
- ▲Panel type: OLED (vs IPS).
Spec comparison
Panel
| Spec | Gigabyte - M27Q X | LG - UltraGear 27GX790A-B |
|---|---|---|
| Screen sizeⓘ | 27 "lead | 26.5 " |
| Panel typeⓘ | IPS | OLEDlead |
| Resolutionⓘ | 1440p | 1440p |
| Aspect ratioⓘ | 16:9 | 16:9 |
| Curvedⓘ | false | false |
Performance
| Spec | Gigabyte - M27Q X | LG - UltraGear 27GX790A-B |
|---|---|---|
| Refresh rateⓘ | 240 Hz | 480 Hzlead |
| Response time (GtG)ⓘ | 0.3 ms | 0.03 mslead |
| Peak brightnessⓘ | 400 nits | 1300 nitslead |
| DCI-P3 coverageⓘ | 92 % | 98.5 %lead |
| HDRⓘ | true | true |
| G-Syncⓘ | true | true |
| FreeSyncⓘ | true | true |
Connectivity
| Spec | Gigabyte - M27Q X | LG - UltraGear 27GX790A-B |
|---|---|---|
| HDMI ports | 2 | 2 |
| DisplayPort ports | 1 | 1 |
| USB-C input | true | true |
| USB-C Power Deliveryⓘ | 15 W | 65 Wlead |
| KVM | truelead | false |
Frequently asked
Which has higher refresh rate, M27Q X or UltraGear 27GX790A-B?+
UltraGear 27GX790A-B refreshes at 480Hz vs 240Hz.
Which has faster response time, M27Q X or UltraGear 27GX790A-B?+
UltraGear 27GX790A-B responds in 0.03ms vs 0.3ms.
Does M27Q X or UltraGear 27GX790A-B have USB-C with power delivery?+
Both offer USB-C PD — 15W on M27Q X, 65W on UltraGear 27GX790A-B.
Spec-level deep dives
More from the same brands
vsMars is reader-supported. When you buy through links on our site, we may earn an affiliate commission at no extra cost to you. Learn more.