Between the M27Q X and UltraGear 45GX950A-B, the M27Q X comes out ahead in refresh rate, while the UltraGear 45GX950A-B wins on usb-c power delivery and peak brightness. Overall, the M27Q X scores 65.7 and the UltraGear 45GX950A-B scores 83.8 on our Mars Score.
Which should you buy?
The UltraGear 45GX950A-B is the clear pick on raw spec strength, leading by 18.1 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
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 refresh rate.
Pick the UltraGear 45GX950A-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, response time (gtg), 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 45GX950A-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
- ▲Refresh rate — 45.45% more. 240 Hz vs 165 Hz.
Why LG - UltraGear 45GX950A-B wins
- ▲USB-C Power Delivery — 500.00% more. 90 W vs 15 W.
- ▲Peak brightness — 225.00% more. 1300 nits vs 400 nits.
- ▲Response time (GtG) — 90.00% less. 0.03 ms vs 0.3 ms.
- ▲Screen size — 66.67% more. 45 " vs 27 ".
- ▲DCI-P3 coverage — 7.07% more. 98.5 % vs 92 %.
- ▲Panel type: OLED (vs IPS).
Spec comparison
Panel
| Spec | Gigabyte - M27Q X | LG - UltraGear 45GX950A-B |
|---|---|---|
| Screen sizeⓘ | 27 " | 45 "lead |
| Panel typeⓘ | IPS | OLEDlead |
| Resolutionⓘ | 1440p | 5Klead |
| Aspect ratioⓘ | 16:9 | 21:9 |
| Curvedⓘ | false | truelead |
Performance
| Spec | Gigabyte - M27Q X | LG - UltraGear 45GX950A-B |
|---|---|---|
| Refresh rateⓘ | 240 Hzlead | 165 Hz |
| 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 45GX950A-B |
|---|---|---|
| HDMI ports | 2 | 2 |
| DisplayPort ports | 1 | 1 |
| USB-C input | true | true |
| USB-C Power Deliveryⓘ | 15 W | 90 Wlead |
| KVM | true | true |
Frequently asked
Which has higher refresh rate, M27Q X or UltraGear 45GX950A-B?+
M27Q X refreshes at 240Hz vs 165Hz.
Which has faster response time, M27Q X or UltraGear 45GX950A-B?+
UltraGear 45GX950A-B responds in 0.03ms vs 0.3ms.
Does M27Q X or UltraGear 45GX950A-B have USB-C with power delivery?+
Both offer USB-C PD — 15W on M27Q X, 90W on UltraGear 45GX950A-B.
Spec-level deep dives
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