Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | MSI - MPG 271QRX | ASUS - ROG Swift PG34WCDM |
|---|---|---|
| Refresh rate | 360 Hz | 240 Hz |
| Peak brightness | 1000 nits | 1300 nits |
| Screen size | 27 " | 34 " |
| USB-C Power Delivery | 98 W | 90 W |
Between the MPG 271QRX and ROG Swift PG34WCDM, the MPG 271QRX comes out ahead in refresh rate / usb-c power delivery, while the ROG Swift PG34WCDM wins on peak brightness / screen size. Overall, the MPG 271QRX scores 76.9 and the ROG Swift PG34WCDM scores 76.8 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (76.9 vs 76.8). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.
Pick the MPG 271QRX 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, usb-c power delivery. The single most decisive one: Refresh rate — 50.00% more. 360 Hz vs 240 Hz.
Pick the ROG Swift PG34WCDM if you care most about peak brightness / screen size. Its strongest claims are peak brightness, screen size. The single most decisive one: Peak brightness — 30.00% more. 1300 nits vs 1000 nits.
Both ship with comparable response time (gtg), dci-p3 coverage, panel type, 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: MSI - MPG 271QRX or ASUS - ROG Swift PG34WCDM?
MSI - MPG 271QRX leads the current Mars Score by 0.1 points.The more useful decision is the trade-off behind that result: compare screen size, refresh rate against the way you will actually use the product.
Choose MSI - MPG 271QRX if…
MSI - MPG 271QRX has the measurable edge on refresh rate hz, has usb c pd w.
Choose ASUS - ROG Swift PG34WCDM if…
ASUS - ROG Swift PG34WCDM has the measurable edge on peak brightness nits, screen size in.
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 MSI - MPG 271QRX wins
- ▲Refresh rate — 50.00% more. 360 Hz vs 240 Hz.
- ▲USB-C Power Delivery — 8.89% more. 98 W vs 90 W.
Why ASUS - ROG Swift PG34WCDM wins
- ▲Peak brightness — 30.00% more. 1300 nits vs 1000 nits.
- ▲Screen size — 25.93% more. 34 " vs 27 ".
Spec comparison
Panel
| Spec | MSI - MPG 271QRX | ASUS - ROG Swift PG34WCDM |
|---|---|---|
| Screen size | 27 " | 34 "lead |
| Panel typeⓘ | QD-OLED | QD-OLED |
| Resolutionⓘ | 1440p | 1440p |
| Aspect ratioⓘ | 16:9 | 21:9 |
| Curvedⓘ | false | truelead |
Performance
| Spec | MSI - MPG 271QRX | ASUS - ROG Swift PG34WCDM |
|---|---|---|
| Refresh rateⓘ | 360 Hzlead | 240 Hz |
| Response time (GtG)ⓘ | 0.03 ms | 0.03 ms |
| Peak brightnessⓘ | 1000 nits | 1300 nitslead |
| DCI-P3 coverageⓘ | 99 % | 99 % |
| HDRⓘ | true | true |
| G-Syncⓘ | true | true |
| FreeSyncⓘ | true | true |
Connectivity
| Spec | MSI - MPG 271QRX | ASUS - ROG Swift PG34WCDM |
|---|---|---|
| HDMI ports | 2 | 2 |
| DisplayPort ports | 1 | 1 |
| USB-C inputⓘ | true | true |
| USB-C Power Deliveryⓘ | 98 Wlead | 90 W |
| KVM | true | true |
Frequently asked
Which has higher refresh rate, MPG 271QRX or ROG Swift PG34WCDM?+
MPG 271QRX refreshes at 360Hz vs 240Hz.
Which has faster response time, MPG 271QRX or ROG Swift PG34WCDM?+
ROG Swift PG34WCDM responds in 0.03ms vs 0.03ms.
Does MPG 271QRX or ROG Swift PG34WCDM have USB-C with power delivery?+
Both offer USB-C PD — 98W on MPG 271QRX, 90W on ROG Swift PG34WCDM.