Samsung - Odyssey OLED G9 (G93SC) vs LG - UltraGear 27GX790A-B
Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Samsung - Odyssey OLED G9 (G93SC) | LG - UltraGear 27GX790A-B |
|---|---|---|
| Refresh rate | 240 Hz | 480 Hz |
| Screen size | 49 " | 26.5 " |
| Peak brightness | 1000 nits | 1300 nits |
| G-Sync | false | true |
| DCI-P3 coverage | 99 % | 98.5 % |
| Panel type | QD-OLED | OLED |
Between the Odyssey OLED G9 (G93SC) and UltraGear 27GX790A-B, the Odyssey OLED G9 (G93SC) comes out ahead in screen size / dci-p3 coverage, while the UltraGear 27GX790A-B wins on refresh rate / peak brightness. Overall, the Odyssey OLED G9 (G93SC) scores 85.6 and the UltraGear 27GX790A-B scores 77.6 on our Mars Score.
Which should you buy?
The Odyssey OLED G9 (G93SC) is the clear pick on raw spec strength, leading by 8.0 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
Pick the Odyssey OLED G9 (G93SC) 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. The single most decisive one: Screen size — 84.91% more. 49 " vs 26.5 ".
Pick the UltraGear 27GX790A-B if you care most about refresh rate / peak brightness. Its strongest claims are refresh rate, peak brightness, g-sync. The single most decisive one: Refresh rate — 100.00% more. 480 Hz vs 240 Hz.
Both ship with comparable response time (gtg), usb-c power delivery, freesync, so those specs do not separate the two — focus on the differences below.
Bottom line: the Odyssey OLED G9 (G93SC) is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Which should you buy: Samsung - Odyssey OLED G9 (G93SC) or LG - UltraGear 27GX790A-B?
Samsung - Odyssey OLED G9 (G93SC) leads the current Mars Score by 8.0 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 Samsung - Odyssey OLED G9 (G93SC) if…
Samsung - Odyssey OLED G9 (G93SC) has the measurable edge on screen size in, color gamut dci p3 pct, panel type.
Choose LG - UltraGear 27GX790A-B if…
LG - UltraGear 27GX790A-B has the measurable edge on refresh rate hz, peak brightness nits, has g sync.
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 Samsung - Odyssey OLED G9 (G93SC) wins
- ▲Screen size — 84.91% more. 49 " 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.
Spec comparison
Panel
| Spec | Samsung - Odyssey OLED G9 (G93SC) | LG - UltraGear 27GX790A-B |
|---|---|---|
| Screen size | 49 "lead | 26.5 " |
| Panel typeⓘ | QD-OLEDlead | OLED |
| Resolutionⓘ | 5Klead | 1440p |
| Aspect ratioⓘ | 32:9 | 16:9 |
| Curvedⓘ | truelead | false |
Performance
| Spec | Samsung - Odyssey OLED G9 (G93SC) | 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 G9 (G93SC) | LG - UltraGear 27GX790A-B |
|---|---|---|
| HDMI ports | 1 | 2lead |
| DisplayPort ports | 1 | 1 |
| USB-C inputⓘ | true | true |
| USB-C Power Deliveryⓘ | 65 W | 65 W |
| KVM | truelead | false |
Frequently asked
Which has higher refresh rate, Odyssey OLED G9 (G93SC) or UltraGear 27GX790A-B?+
UltraGear 27GX790A-B refreshes at 480Hz vs 240Hz.
Which has faster response time, Odyssey OLED G9 (G93SC) or UltraGear 27GX790A-B?+
UltraGear 27GX790A-B responds in 0.03ms vs 0.03ms.
Does Odyssey OLED G9 (G93SC) or UltraGear 27GX790A-B have USB-C with power delivery?+
Both offer USB-C PD — 65W on Odyssey OLED G9 (G93SC), 65W on UltraGear 27GX790A-B.