Samsung - Odyssey OLED G8 (G80SD) vs LG - UltraGear 27GX790A-B
Between the Odyssey OLED G8 (G80SD) and UltraGear 27GX790A-B, the Odyssey OLED G8 (G80SD) comes out ahead in screen size / dci-p3 coverage, while the UltraGear 27GX790A-B wins on refresh rate / peak brightness. Overall, the Odyssey OLED G8 (G80SD) scores 73.2 and the UltraGear 27GX790A-B scores 72.6 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (73.2 vs 72.6). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.
Pick the Odyssey OLED G8 (G80SD) 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, dci-p3 coverage, panel type.
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, peak brightness, g-sync, among others.
Both ship with comparable response time (gtg), 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.
Why Samsung - Odyssey OLED G8 (G80SD) wins
- ▲Screen size — 20.75% more. 32 " 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.
- ▲Peak brightness — 30.00% more. 1300 nits vs 1000 nits.
- ▲Has G-Sync.
- ▲USB-C Power Delivery: 65 W vs 0 W.
Spec comparison
Panel
| Spec | Samsung - Odyssey OLED G8 (G80SD) | LG - UltraGear 27GX790A-B |
|---|---|---|
| Screen sizeⓘ | 32 "lead | 26.5 " |
| Panel typeⓘ | QD-OLEDlead | OLED |
| Resolutionⓘ | 4Klead | 1440p |
| Aspect ratioⓘ | 16:9 | 16:9 |
| Curvedⓘ | false | false |
Performance
| Spec | Samsung - Odyssey OLED G8 (G80SD) | LG - UltraGear 27GX790A-B |
|---|---|---|
| Refresh rateⓘ | 240 Hz | 480 Hzlead |
| Response time (GtG)ⓘ | 0.03 ms | 0.03 ms |
| Peak brightnessⓘ | 1000 nits | 1300 nitslead |
| DCI-P3 coverageⓘ | 99 %lead | 98.5 % |
| HDRⓘ | true | true |
| G-Syncⓘ | false | truelead |
| FreeSyncⓘ | true | true |
Connectivity
| Spec | Samsung - Odyssey OLED G8 (G80SD) | LG - UltraGear 27GX790A-B |
|---|---|---|
| HDMI ports | 1 | 2lead |
| DisplayPort ports | 1 | 1 |
| USB-C input | false | truelead |
| USB-C Power Deliveryⓘ | 0 W | 65 Wlead |
| KVM | false | false |
Frequently asked
Which has higher refresh rate, Odyssey OLED G8 (G80SD) or UltraGear 27GX790A-B?+
UltraGear 27GX790A-B refreshes at 480Hz vs 240Hz.
Which has faster response time, Odyssey OLED G8 (G80SD) or UltraGear 27GX790A-B?+
UltraGear 27GX790A-B responds in 0.03ms vs 0.03ms.
Does Odyssey OLED G8 (G80SD) or UltraGear 27GX790A-B have USB-C with power delivery?+
UltraGear 27GX790A-B offers USB-C with 65W power delivery.
Spec-level deep dives
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