Between the M27Q X and ROG Swift PG34WCDM, the M27Q X comes out ahead in several specs, while the ROG Swift PG34WCDM wins on usb-c power delivery and peak brightness. Overall, the M27Q X scores 65.7 and the ROG Swift PG34WCDM scores 75.1 on our Mars Score.
Which should you buy?
The ROG Swift PG34WCDM is the clear pick on raw spec strength, leading by 9.4 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.
The M27Q X doesn't pull ahead on any single popular-comparison spec — its strengths sit in the spec table groups rather than the headline advantages.
Pick the ROG Swift PG34WCDM 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 refresh rate, g-sync, freesync, so those specs don't separate the two — focus on the differences below.
Bottom line: the ROG Swift PG34WCDM 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
- No decisive advantages.
Why ASUS - ROG Swift PG34WCDM 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 — 25.93% more. 34 " vs 27 ".
- ▲DCI-P3 coverage — 7.61% more. 99 % vs 92 %.
- ▲Panel type: QD-OLED (vs IPS).
Spec comparison
Panel
| Spec | Gigabyte - M27Q X | ASUS - ROG Swift PG34WCDM |
|---|---|---|
| Screen sizeⓘ | 27 " | 34 "lead |
| Panel typeⓘ | IPS | QD-OLEDlead |
| Resolutionⓘ | 1440p | 1440p |
| Aspect ratioⓘ | 16:9 | 21:9 |
| Curvedⓘ | false | truelead |
Performance
| Spec | Gigabyte - M27Q X | ASUS - ROG Swift PG34WCDM |
|---|---|---|
| Refresh rateⓘ | 240 Hz | 240 Hz |
| Response time (GtG)ⓘ | 0.3 ms | 0.03 mslead |
| Peak brightnessⓘ | 400 nits | 1300 nitslead |
| DCI-P3 coverageⓘ | 92 % | 99 %lead |
| HDRⓘ | true | true |
| G-Syncⓘ | true | true |
| FreeSyncⓘ | true | true |
Connectivity
| Spec | Gigabyte - M27Q X | ASUS - ROG Swift PG34WCDM |
|---|---|---|
| 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 ROG Swift PG34WCDM?+
ROG Swift PG34WCDM refreshes at 240Hz vs 240Hz.
Which has faster response time, M27Q X or ROG Swift PG34WCDM?+
ROG Swift PG34WCDM responds in 0.03ms vs 0.3ms.
Does M27Q X or ROG Swift PG34WCDM have USB-C with power delivery?+
Both offer USB-C PD — 15W on M27Q X, 90W on ROG Swift PG34WCDM.
Spec-level deep dives
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