ASUS - ROG Swift PG39WCDM vs LG - UltraGear 45GX950A-B
Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | ASUS - ROG Swift PG39WCDM | LG - UltraGear 45GX950A-B |
|---|---|---|
| Refresh rate | 240 Hz | 165 Hz |
| Screen size | 39 " | 45 " |
| DCI-P3 coverage | 99 % | 98.5 % |
| Panel type | QD-OLED | OLED |
Between the ROG Swift PG39WCDM and UltraGear 45GX950A-B, the ROG Swift PG39WCDM comes out ahead in refresh rate / dci-p3 coverage, while the UltraGear 45GX950A-B wins on screen size. Overall, the ROG Swift PG39WCDM scores 78.3 and the UltraGear 45GX950A-B scores 81.4 on our Mars Score.
Which should you buy?
The UltraGear 45GX950A-B edges ahead on the Mars Score (78.3 vs 81.4), but the 3.1-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 refresh rate, dci-p3 coverage, panel type. The single most decisive one: Refresh rate — 45.45% more. 240 Hz vs 165 Hz.
Pick the UltraGear 45GX950A-B if you care most about screen size. Its strongest claims are screen size. The single most decisive one: Screen size — 15.38% more. 45 " vs 39 ".
Both ship with comparable response time (gtg), peak brightness, usb-c power delivery, 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 PG39WCDM or LG - UltraGear 45GX950A-B?
LG - UltraGear 45GX950A-B leads the current Mars Score by 3.1 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 PG39WCDM if…
ASUS - ROG Swift PG39WCDM has the measurable edge on refresh rate hz, color gamut dci p3 pct, panel type.
Choose LG - UltraGear 45GX950A-B if…
LG - UltraGear 45GX950A-B has the measurable edge on 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 ASUS - ROG Swift PG39WCDM wins
- ▲Refresh rate — 45.45% more. 240 Hz vs 165 Hz.
- ▲DCI-P3 coverage — 0.51% more. 99 % vs 98.5 %.
- ▲Panel type: QD-OLED (vs OLED).
Why LG - UltraGear 45GX950A-B wins
- ▲Screen size — 15.38% more. 45 " vs 39 ".
Spec comparison
Panel
| Spec | ASUS - ROG Swift PG39WCDM | LG - UltraGear 45GX950A-B |
|---|---|---|
| Screen size | 39 " | 45 "lead |
| Panel typeⓘ | QD-OLEDlead | OLED |
| Resolutionⓘ | 1440p | 5Klead |
| Aspect ratioⓘ | 21:9 | 21:9 |
| Curvedⓘ | true | true |
Performance
| Spec | ASUS - ROG Swift PG39WCDM | LG - UltraGear 45GX950A-B |
|---|---|---|
| Refresh rateⓘ | 240 Hzlead | 165 Hz |
| 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 45GX950A-B |
|---|---|---|
| HDMI ports | 2 | 2 |
| DisplayPort ports | 1 | 1 |
| USB-C inputⓘ | true | true |
| USB-C Power Deliveryⓘ | 90 W | 90 W |
| KVM | true | true |
Frequently asked
Which has higher refresh rate, ROG Swift PG39WCDM or UltraGear 45GX950A-B?+
ROG Swift PG39WCDM refreshes at 240Hz vs 165Hz.
Which has faster response time, ROG Swift PG39WCDM or UltraGear 45GX950A-B?+
UltraGear 45GX950A-B responds in 0.03ms vs 0.03ms.
Does ROG Swift PG39WCDM or UltraGear 45GX950A-B have USB-C with power delivery?+
Both offer USB-C PD — 90W on ROG Swift PG39WCDM, 90W on UltraGear 45GX950A-B.