ASUS - ROG Swift PG39WCDM vs LG - UltraGear 27GX790A-B
Between the ROG Swift PG39WCDM and UltraGear 27GX790A-B, the ROG Swift PG39WCDM comes out ahead in screen size and usb-c power delivery, while the UltraGear 27GX790A-B wins on refresh rate. Overall, the ROG Swift PG39WCDM scores 79.8 and the UltraGear 27GX790A-B scores 72.6 on our Mars Score.
Which should you buy?
The ROG Swift PG39WCDM edges ahead on the Mars Score (79.8 vs 72.6), but the 7.2-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the ROG Swift PG39WCDM 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, usb-c power delivery, dci-p3 coverage, among others.
Pick the UltraGear 27GX790A-B 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.
Both ship with comparable response time (gtg), peak brightness, g-sync, so those specs don't separate the two — focus on the differences below.
Bottom line: the ROG Swift PG39WCDM is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why ASUS - ROG Swift PG39WCDM wins
- ▲Screen size — 47.17% more. 39 " vs 26.5 ".
- ▲USB-C Power Delivery — 38.46% more. 90 W vs 65 W.
- ▲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 PG39WCDM | LG - UltraGear 27GX790A-B |
|---|---|---|
| Screen sizeⓘ | 39 "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 PG39WCDM | 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 PG39WCDM | 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 PG39WCDM or UltraGear 27GX790A-B?+
UltraGear 27GX790A-B refreshes at 480Hz vs 240Hz.
Which has faster response time, ROG Swift PG39WCDM or UltraGear 27GX790A-B?+
UltraGear 27GX790A-B responds in 0.03ms vs 0.03ms.
Does ROG Swift PG39WCDM or UltraGear 27GX790A-B have USB-C with power delivery?+
Both offer USB-C PD — 90W on ROG Swift PG39WCDM, 65W on UltraGear 27GX790A-B.
Spec-level deep dives
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