Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Gigabyte - M27Q X | LG - UltraGear 27GP950-B |
|---|---|---|
| Response time (GtG) | 0.3 ms | 1 ms |
| Refresh rate | 240 Hz | 160 Hz |
| Peak brightness | 400 nits | 600 nits |
| DCI-P3 coverage | 92 % | 98 % |
| USB-C Power Delivery | 15 W | 0 W |
Between the M27Q X and UltraGear 27GP950-B, the M27Q X comes out ahead in response time (gtg) / refresh rate, while the UltraGear 27GP950-B wins on peak brightness / dci-p3 coverage. Overall, the M27Q X scores 67.6 and the UltraGear 27GP950-B scores 69.5 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (67.6 vs 69.5). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.
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 response time (gtg), refresh rate, usb-c power delivery. The single most decisive one: Response time (GtG) — 70.00% less. 0.3 ms vs 1 ms.
Pick the UltraGear 27GP950-B if you care most about peak brightness / dci-p3 coverage. Its strongest claims are peak brightness, dci-p3 coverage. The single most decisive one: Peak brightness — 50.00% more. 600 nits vs 400 nits.
Both ship with comparable screen size, panel type, g-sync, so those specs do not separate the two — focus on the differences below.
Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity says both are well-rounded; the differences are about trade-offs, not quality.
Which should you buy: Gigabyte - M27Q X or LG - UltraGear 27GP950-B?
LG - UltraGear 27GP950-B leads the current Mars Score by 1.9 points.The more useful decision is the trade-off behind that result: compare refresh rate against the way you will actually use the product.
Choose Gigabyte - M27Q X if…
Gigabyte - M27Q X has the measurable edge on response time ms, refresh rate hz, has usb c pd w.
Choose LG - UltraGear 27GP950-B if…
LG - UltraGear 27GP950-B has the measurable edge on peak brightness nits, color gamut dci p3 pct.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why Gigabyte - M27Q X wins
- ▲Response time (GtG) — 70.00% less. 0.3 ms vs 1 ms.
- ▲Refresh rate — 50.00% more. 240 Hz vs 160 Hz.
- ▲USB-C Power Delivery: 15 W vs 0 W.
Why LG - UltraGear 27GP950-B wins
- ▲Peak brightness — 50.00% more. 600 nits vs 400 nits.
- ▲DCI-P3 coverage — 6.52% more. 98 % vs 92 %.
Spec comparison
Panel
| Spec | Gigabyte - M27Q X | LG - UltraGear 27GP950-B |
|---|---|---|
| Screen size | 27 " | 27 " |
| Panel typeⓘ | IPS | IPS |
| Resolutionⓘ | 1440p | 4Klead |
| Aspect ratioⓘ | 16:9 | 16:9 |
| Curvedⓘ | false | false |
Performance
| Spec | Gigabyte - M27Q X | LG - UltraGear 27GP950-B |
|---|---|---|
| Refresh rateⓘ | 240 Hzlead | 160 Hz |
| Response time (GtG)ⓘ | 0.3 mslead | 1 ms |
| Peak brightnessⓘ | 400 nits | 600 nitslead |
| DCI-P3 coverageⓘ | 92 % | 98 %lead |
| HDRⓘ | true | true |
| G-Syncⓘ | true | true |
| FreeSyncⓘ | true | true |
Connectivity
| Spec | Gigabyte - M27Q X | LG - UltraGear 27GP950-B |
|---|---|---|
| HDMI ports | 2 | 2 |
| DisplayPort ports | 1 | 1 |
| USB-C inputⓘ | truelead | false |
| USB-C Power Deliveryⓘ | 15 Wlead | 0 W |
| KVM | truelead | false |
Frequently asked
Which has higher refresh rate, M27Q X or UltraGear 27GP950-B?+
M27Q X refreshes at 240Hz vs 160Hz.
Which has faster response time, M27Q X or UltraGear 27GP950-B?+
M27Q X responds in 0.3ms vs 1ms.
Does M27Q X or UltraGear 27GP950-B have USB-C with power delivery?+
M27Q X offers USB-C with 15W power delivery.