ASUS - ROG Swift PG34WCDM vs LG - UltraGear 27GX790A-B
Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | ASUS - ROG Swift PG34WCDM | LG - UltraGear 27GX790A-B |
|---|---|---|
| Refresh rate | 240 Hz | 480 Hz |
| USB-C Power Delivery | 90 W | 65 W |
| Screen size | 34 " | 26.5 " |
| DCI-P3 coverage | 99 % | 98.5 % |
| Panel type | QD-OLED | OLED |
Between the ROG Swift PG34WCDM and UltraGear 27GX790A-B, the ROG Swift PG34WCDM comes out ahead in usb-c power delivery / screen size, while the UltraGear 27GX790A-B wins on refresh rate. Overall, the ROG Swift PG34WCDM scores 76.8 and the UltraGear 27GX790A-B scores 77.6 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (76.8 vs 77.6). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.
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. The biggest gaps in its favor are usb-c power delivery, screen size, dci-p3 coverage, among others. The single most decisive one: USB-C Power Delivery — 38.46% more. 90 W vs 65 W.
Pick the UltraGear 27GX790A-B if you care most about refresh rate. Its strongest claims are refresh rate. The single most decisive one: Refresh rate — 100.00% more. 480 Hz vs 240 Hz.
Both ship with comparable response time (gtg), peak brightness, 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: ASUS - ROG Swift PG34WCDM or LG - UltraGear 27GX790A-B?
LG - UltraGear 27GX790A-B leads the current Mars Score by 0.8 points.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 ASUS - ROG Swift PG34WCDM if…
ASUS - ROG Swift PG34WCDM has the measurable edge on has usb c pd w, screen size in, color gamut dci p3 pct.
Choose LG - UltraGear 27GX790A-B if…
LG - UltraGear 27GX790A-B has the measurable edge on 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 ASUS - ROG Swift PG34WCDM wins
- ▲USB-C Power Delivery — 38.46% more. 90 W vs 65 W.
- ▲Screen size — 28.30% more. 34 " vs 26.5 ".
- ▲DCI-P3 coverage — 0.51% more. 99 % vs 98.5 %.
- ▲Panel type: QD-OLED (vs OLED).
Why LG - UltraGear 27GX790A-B wins
- ▲Refresh rate — 100.00% more. 480 Hz vs 240 Hz.
Spec comparison
Panel
| Spec | ASUS - ROG Swift PG34WCDM | LG - UltraGear 27GX790A-B |
|---|---|---|
| Screen size | 34 "lead | 26.5 " |
| Panel typeⓘ | QD-OLEDlead | OLED |
| Resolutionⓘ | 1440p | 1440p |
| Aspect ratioⓘ | 21:9 | 16:9 |
| Curvedⓘ | truelead | false |
Performance
| Spec | ASUS - ROG Swift PG34WCDM | LG - UltraGear 27GX790A-B |
|---|---|---|
| Refresh rateⓘ | 240 Hz | 480 Hzlead |
| Response time (GtG)ⓘ | 0.03 ms | 0.03 ms |
| Peak brightnessⓘ | 1300 nits | 1300 nits |
| DCI-P3 coverageⓘ | 99 %lead | 98.5 % |
| HDRⓘ | true | true |
| G-Syncⓘ | true | true |
| FreeSyncⓘ | true | true |
Connectivity
| Spec | ASUS - ROG Swift PG34WCDM | LG - UltraGear 27GX790A-B |
|---|---|---|
| HDMI ports | 2 | 2 |
| DisplayPort ports | 1 | 1 |
| USB-C inputⓘ | true | true |
| USB-C Power Deliveryⓘ | 90 Wlead | 65 W |
| KVM | truelead | false |
Frequently asked
Which has higher refresh rate, ROG Swift PG34WCDM or UltraGear 27GX790A-B?+
UltraGear 27GX790A-B refreshes at 480Hz vs 240Hz.
Which has faster response time, ROG Swift PG34WCDM or UltraGear 27GX790A-B?+
UltraGear 27GX790A-B responds in 0.03ms vs 0.03ms.
Does ROG Swift PG34WCDM or UltraGear 27GX790A-B have USB-C with power delivery?+
Both offer USB-C PD — 90W on ROG Swift PG34WCDM, 65W on UltraGear 27GX790A-B.