ASUS - ROG Swift PG39WCDM vs LG - UltraGear 27GP950-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 27GP950-B |
|---|---|---|
| Peak brightness | 1300 nits | 600 nits |
| Response time (GtG) | 0.03 ms | 1 ms |
| Refresh rate | 240 Hz | 160 Hz |
| Screen size | 39 " | 27 " |
| DCI-P3 coverage | 99 % | 98 % |
| Panel type | QD-OLED | IPS |
Between the ROG Swift PG39WCDM and UltraGear 27GP950-B, the ROG Swift PG39WCDM comes out ahead in peak brightness / response time (gtg), while the UltraGear 27GP950-B wins on several specs. Overall, the ROG Swift PG39WCDM scores 78.3 and the UltraGear 27GP950-B scores 78.2 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (78.3 vs 78.2). 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 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 peak brightness, response time (gtg), refresh rate, among others. The single most decisive one: Peak brightness — 116.67% more. 1300 nits vs 600 nits.
The UltraGear 27GP950-B similarly does not carry a headline advantage on the popular specs — look at the full table for category-specific deltas.
Both ship with comparable g-sync, freesync, 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 27GP950-B?
ASUS - ROG Swift PG39WCDM 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, 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 peak brightness nits, response time ms, refresh rate hz.
Choose LG - UltraGear 27GP950-B if…
LG - UltraGear 27GP950-B does not lead a decisive measured field here, so choose it for price, ecosystem, design, or availability when those matter more to you.
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
- ▲Peak brightness — 116.67% more. 1300 nits vs 600 nits.
- ▲Response time (GtG) — 97.00% less. 0.03 ms vs 1 ms.
- ▲Refresh rate — 50.00% more. 240 Hz vs 160 Hz.
- ▲Screen size — 44.44% more. 39 " vs 27 ".
- ▲DCI-P3 coverage — 1.02% more. 99 % vs 98 %.
- ▲Panel type: QD-OLED (vs IPS).
Why LG - UltraGear 27GP950-B wins
- No decisive advantages.
Spec comparison
Panel
| Spec | ASUS - ROG Swift PG39WCDM | LG - UltraGear 27GP950-B |
|---|---|---|
| Screen size | 39 "lead | 27 " |
| Panel typeⓘ | QD-OLEDlead | IPS |
| Resolutionⓘ | 1440p | 4Klead |
| Aspect ratioⓘ | 21:9 | 16:9 |
| Curvedⓘ | truelead | false |
Performance
| Spec | ASUS - ROG Swift PG39WCDM | LG - UltraGear 27GP950-B |
|---|---|---|
| Refresh rateⓘ | 240 Hzlead | 160 Hz |
| Response time (GtG)ⓘ | 0.03 mslead | 1 ms |
| Peak brightnessⓘ | 1300 nitslead | 600 nits |
| DCI-P3 coverageⓘ | 99 %lead | 98 % |
| HDRⓘ | true | true |
| G-Syncⓘ | true | true |
| FreeSyncⓘ | true | true |
Connectivity
| Spec | ASUS - ROG Swift PG39WCDM | LG - UltraGear 27GP950-B |
|---|---|---|
| HDMI ports | 2 | 2 |
| DisplayPort ports | 1 | 1 |
| USB-C inputⓘ | truelead | false |
| USB-C Power Deliveryⓘ | 90 W | — |
| KVM | truelead | false |
Frequently asked
Which has higher refresh rate, ROG Swift PG39WCDM or UltraGear 27GP950-B?+
ROG Swift PG39WCDM refreshes at 240Hz vs 160Hz.
Which has faster response time, ROG Swift PG39WCDM or UltraGear 27GP950-B?+
ROG Swift PG39WCDM responds in 0.03ms vs 1ms.
Does ROG Swift PG39WCDM or UltraGear 27GP950-B have USB-C with power delivery?+
ROG Swift PG39WCDM offers USB-C with 90W power delivery.