LG - UltraGear 27GP950-B 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 | LG - UltraGear 27GP950-B | LG - UltraGear 45GX950A-B |
|---|---|---|
| Peak brightness | 600 nits | 1300 nits |
| Response time (GtG) | 1 ms | 0.03 ms |
| Screen size | 27 " | 45 " |
| Refresh rate | 160 Hz | 165 Hz |
| DCI-P3 coverage | 98 % | 98.5 % |
| Panel type | IPS | OLED |
Between the UltraGear 27GP950-B and UltraGear 45GX950A-B, the UltraGear 27GP950-B comes out ahead in several specs, while the UltraGear 45GX950A-B wins on peak brightness / response time (gtg). Overall, the UltraGear 27GP950-B scores 78.2 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 (78.2 vs 81.4), but the 3.2-point gap is small enough that the right pick comes down to which spec advantages matter to you.
The UltraGear 27GP950-B does not pull ahead on any single popular-comparison spec — its strengths sit in the spec-table groups rather than the headline advantages.
Pick the UltraGear 45GX950A-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 peak brightness, response time (gtg), screen size, among others. The single most decisive one: Peak brightness — 116.67% more. 1300 nits vs 600 nits.
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: LG - UltraGear 27GP950-B or LG - UltraGear 45GX950A-B?
LG - UltraGear 45GX950A-B leads the current Mars Score by 3.2 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 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.
Choose LG - UltraGear 45GX950A-B if…
LG - UltraGear 45GX950A-B has the measurable edge on peak brightness nits, response time ms, 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 LG - UltraGear 27GP950-B wins
- No decisive advantages.
Why LG - UltraGear 45GX950A-B wins
- ▲Peak brightness — 116.67% more. 1300 nits vs 600 nits.
- ▲Response time (GtG) — 97.00% less. 0.03 ms vs 1 ms.
- ▲Screen size — 66.67% more. 45 " vs 27 ".
- ▲Refresh rate — 3.13% more. 165 Hz vs 160 Hz.
- ▲DCI-P3 coverage — 0.51% more. 98.5 % vs 98 %.
- ▲Panel type: OLED (vs IPS).
Spec comparison
Panel
| Spec | LG - UltraGear 27GP950-B | LG - UltraGear 45GX950A-B |
|---|---|---|
| Screen size | 27 " | 45 "lead |
| Panel typeⓘ | IPS | OLEDlead |
| Resolutionⓘ | 4K | 5Klead |
| Aspect ratioⓘ | 16:9 | 21:9 |
| Curvedⓘ | false | truelead |
Performance
| Spec | LG - UltraGear 27GP950-B | LG - UltraGear 45GX950A-B |
|---|---|---|
| Refresh rateⓘ | 160 Hz | 165 Hzlead |
| Response time (GtG)ⓘ | 1 ms | 0.03 mslead |
| Peak brightnessⓘ | 600 nits | 1300 nitslead |
| DCI-P3 coverageⓘ | 98 % | 98.5 %lead |
| HDRⓘ | true | true |
| G-Syncⓘ | true | true |
| FreeSyncⓘ | true | true |
Connectivity
| Spec | LG - UltraGear 27GP950-B | LG - UltraGear 45GX950A-B |
|---|---|---|
| HDMI ports | 2 | 2 |
| DisplayPort ports | 1 | 1 |
| USB-C inputⓘ | false | truelead |
| USB-C Power Deliveryⓘ | — | 90 W |
| KVM | false | truelead |
Frequently asked
Which has higher refresh rate, UltraGear 27GP950-B or UltraGear 45GX950A-B?+
UltraGear 45GX950A-B refreshes at 165Hz vs 160Hz.
Which has faster response time, UltraGear 27GP950-B or UltraGear 45GX950A-B?+
UltraGear 45GX950A-B responds in 0.03ms vs 1ms.
Does UltraGear 27GP950-B or UltraGear 45GX950A-B have USB-C with power delivery?+
UltraGear 45GX950A-B offers USB-C with 90W power delivery.