Between the C5 OLED 77 and QN900F 8K 65, the C5 OLED 77 comes out ahead in screen size and dolby vision, while the QN900F 8K 65 wins on peak brightness and refresh rate. Overall, the C5 OLED 77 scores 66.9 and the QN900F 8K 65 scores 74.2 on our Mars Score.
Which should you buy?
The QN900F 8K 65 edges ahead on the Mars Score (66.9 vs 74.2), but the 7.3-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the C5 OLED 77 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, dolby vision, panel type, among others.
Pick the QN900F 8K 65 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, refresh rate.
Both ship with comparable hdmi 2.1 ports, vrr, so those specs don't separate the two — focus on the differences below.
Bottom line: the QN900F 8K 65 is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why LG - C5 OLED 77 wins
- ▲Screen size — 18.46% more. 77 " vs 65 ".
- ▲Has Dolby Vision.
- ▲Panel type: OLED (vs Mini-LED).
- ▲Smart OS: webOS (vs Tizen).
Why Samsung - QN900F 8K 65 wins
- ▲Peak brightness — 130.77% more. 3000 nits vs 1300 nits.
- ▲Refresh rate — 14.58% more. 165 Hz vs 144 Hz.
Spec comparison
Display
| Spec | LG - C5 OLED 77 | Samsung - QN900F 8K 65 |
|---|---|---|
| Screen sizeⓘ | 77 "lead | 65 " |
| Panel typeⓘ | OLEDlead | Mini-LED |
| Resolutionⓘ | 4K | 8Klead |
| Refresh rateⓘ | 144 Hz | 165 Hzlead |
| Peak brightnessⓘ | 1300 nits | 3000 nitslead |
HDR & Smart
| Spec | LG - C5 OLED 77 | Samsung - QN900F 8K 65 |
|---|---|---|
| Dolby Visionⓘ | truelead | false |
| HDR10+ⓘ | false | truelead |
| Smart OS | webOSlead | Tizen |
| Dolby Atmosⓘ | true | true |
Gaming
| Spec | LG - C5 OLED 77 | Samsung - QN900F 8K 65 |
|---|---|---|
| HDMI 2.1 portsⓘ | 4 | 4 |
| VRRⓘ | true | true |
| ALLM | true | true |
Frequently asked
Which is brighter, C5 OLED 77 or QN900F 8K 65?+
QN900F 8K 65 peaks at 3000 nits vs 1300 nits.
Which is better for gaming, C5 OLED 77 or QN900F 8K 65?+
QN900F 8K 65 offers 165Hz refresh and 4 HDMI 2.1 ports.
Does C5 OLED 77 or QN900F 8K 65 support Dolby Vision?+
C5 OLED 77 supports Dolby Vision; QN900F 8K 65 does not.
Spec-level deep dives
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