Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | LG - UltraGear 27GP950-B | MSI - MPG 321URX |
|---|---|---|
| Response time (GtG) | 1 ms | 0.03 ms |
| Peak brightness | 600 nits | 1000 nits |
| Refresh rate | 160 Hz | 240 Hz |
| Screen size | 27 " | 32 " |
| DCI-P3 coverage | 98 % | 99 % |
| Panel type | IPS | QD-OLED |
Between the UltraGear 27GP950-B and MPG 321URX, the UltraGear 27GP950-B comes out ahead in several specs, while the MPG 321URX wins on response time (gtg) / peak brightness. Overall, the UltraGear 27GP950-B scores 78.2 and the MPG 321URX scores 78.2 on our Mars Score.
Which should you buy?
These two are evenly matched on the broad strokes; the decision sits on which individual spec advantages weigh more for your use.
The UltraGear 27GP950-B does not pull ahead on any single popular-comparison spec — its strengths sit in the spec-table groups rather than the headline advantages.
Pick the MPG 321URX 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 response time (gtg), peak brightness, refresh rate, among others. The single most decisive one: Response time (GtG) — 97.00% less. 0.03 ms vs 1 ms.
Both ship with comparable g-sync, freesync, 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: LG - UltraGear 27GP950-B or MSI - MPG 321URX?
The two products are effectively tied on the current Mars Score.The more useful decision is the trade-off behind that result: compare screen size, refresh rate, panel type against the way you will actually use the product.
Choose LG - UltraGear 27GP950-B if…
LG - UltraGear 27GP950-B does not lead a decisive measured field here, so choose it for price, ecosystem, design, or availability when those matter more to you.
Choose MSI - MPG 321URX if…
MSI - MPG 321URX has the measurable edge on response time ms, peak brightness nits, refresh rate hz.
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 LG - UltraGear 27GP950-B wins
- No decisive advantages.
Why MSI - MPG 321URX wins
- ▲Response time (GtG) — 97.00% less. 0.03 ms vs 1 ms.
- ▲Peak brightness — 66.67% more. 1000 nits vs 600 nits.
- ▲Refresh rate — 50.00% more. 240 Hz vs 160 Hz.
- ▲Screen size — 18.52% more. 32 " vs 27 ".
- ▲DCI-P3 coverage — 1.02% more. 99 % vs 98 %.
- ▲Panel type: QD-OLED (vs IPS).
Spec comparison
Panel
| Spec | LG - UltraGear 27GP950-B | MSI - MPG 321URX |
|---|---|---|
| Screen size | 27 " | 32 "lead |
| Panel typeⓘ | IPS | QD-OLEDlead |
| Resolutionⓘ | 4K | 4K |
| Aspect ratioⓘ | 16:9 | 16:9 |
| Curvedⓘ | false | false |
Performance
| Spec | LG - UltraGear 27GP950-B | MSI - MPG 321URX |
|---|---|---|
| Refresh rateⓘ | 160 Hz | 240 Hzlead |
| Response time (GtG)ⓘ | 1 ms | 0.03 mslead |
| Peak brightnessⓘ | 600 nits | 1000 nitslead |
| DCI-P3 coverageⓘ | 98 % | 99 %lead |
| HDRⓘ | true | true |
| G-Syncⓘ | true | true |
| FreeSyncⓘ | true | true |
Connectivity
| Spec | LG - UltraGear 27GP950-B | MSI - MPG 321URX |
|---|---|---|
| HDMI ports | 2 | 2 |
| DisplayPort ports | 1 | 1 |
| USB-C inputⓘ | false | truelead |
| USB-C Power Deliveryⓘ | — | 98 W |
| KVM | false | truelead |
Frequently asked
Which has higher refresh rate, UltraGear 27GP950-B or MPG 321URX?+
MPG 321URX refreshes at 240Hz vs 160Hz.
Which has faster response time, UltraGear 27GP950-B or MPG 321URX?+
MPG 321URX responds in 0.03ms vs 1ms.
Does UltraGear 27GP950-B or MPG 321URX have USB-C with power delivery?+
MPG 321URX offers USB-C with 98W power delivery.