Between the UltraGear 45GX950A-B and MPG 321URX, the UltraGear 45GX950A-B comes out ahead in screen size and peak brightness, while the MPG 321URX wins on refresh rate and usb-c power delivery. Overall, the UltraGear 45GX950A-B scores 83.8 and the MPG 321URX scores 73.2 on our Mars Score.
Which should you buy?
The UltraGear 45GX950A-B is the clear pick on raw spec strength, leading by 10.6 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 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. The biggest gaps in its favor are screen size, peak brightness.
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 refresh rate, usb-c power delivery, dci-p3 coverage, among others.
Both ship with comparable response time (gtg), 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 LG - UltraGear 45GX950A-B wins
- ▲Screen size — 40.63% more. 45 " vs 32 ".
- ▲Peak brightness — 30.00% more. 1300 nits vs 1000 nits.
Why MSI - MPG 321URX wins
- ▲Refresh rate — 45.45% more. 240 Hz vs 165 Hz.
- ▲USB-C Power Delivery — 8.89% more. 98 W vs 90 W.
- ▲DCI-P3 coverage — 0.51% more. 99 % vs 98.5 %.
- ▲Panel type: QD-OLED (vs OLED).
Spec comparison
Panel
| Spec | LG - UltraGear 45GX950A-B | MSI - MPG 321URX |
|---|---|---|
| Screen sizeⓘ | 45 "lead | 32 " |
| Panel typeⓘ | OLED | QD-OLEDlead |
| Resolutionⓘ | 5Klead | 4K |
| Aspect ratioⓘ | 21:9 | 16:9 |
| Curvedⓘ | truelead | false |
Performance
| Spec | LG - UltraGear 45GX950A-B | MSI - MPG 321URX |
|---|---|---|
| Refresh rateⓘ | 165 Hz | 240 Hzlead |
| Response time (GtG)ⓘ | 0.03 ms | 0.03 ms |
| Peak brightnessⓘ | 1300 nitslead | 1000 nits |
| DCI-P3 coverageⓘ | 98.5 % | 99 %lead |
| HDRⓘ | true | true |
| G-Syncⓘ | true | true |
| FreeSyncⓘ | true | true |
Connectivity
| Spec | LG - UltraGear 45GX950A-B | MSI - MPG 321URX |
|---|---|---|
| HDMI ports | 2 | 2 |
| DisplayPort ports | 1 | 1 |
| USB-C input | true | true |
| USB-C Power Deliveryⓘ | 90 W | 98 Wlead |
| KVM | true | true |
Frequently asked
Which has higher refresh rate, UltraGear 45GX950A-B or MPG 321URX?+
MPG 321URX refreshes at 240Hz vs 165Hz.
Which has faster response time, UltraGear 45GX950A-B or MPG 321URX?+
MPG 321URX responds in 0.03ms vs 0.03ms.
Does UltraGear 45GX950A-B or MPG 321URX have USB-C with power delivery?+
Both offer USB-C PD — 90W on UltraGear 45GX950A-B, 98W on MPG 321URX.
Spec-level deep dives
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