Between the B5 OLED 65 and C5 OLED 77, the B5 OLED 65 comes out ahead in several specs, while the C5 OLED 77 wins on peak brightness and refresh rate. Overall, the B5 OLED 65 scores 57.9 and the C5 OLED 77 scores 66.9 on our Mars Score.
Which should you buy?
The C5 OLED 77 is the clear pick on raw spec strength, leading by 9.0 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.
The B5 OLED 65 doesn't pull ahead on any single popular-comparison spec — its strengths sit in the spec table groups rather than the headline advantages.
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. Its strongest claims are peak brightness, refresh rate, screen size.
Both ship with comparable panel type, dolby vision, hdmi 2.1 ports, so those specs don't separate the two — focus on the differences below.
Bottom line: the C5 OLED 77 is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why LG - B5 OLED 65 wins
- No decisive advantages.
Why LG - C5 OLED 77 wins
- ▲Peak brightness — 73.33% more. 1300 nits vs 750 nits.
- ▲Refresh rate — 20.00% more. 144 Hz vs 120 Hz.
- ▲Screen size — 18.46% more. 77 " vs 65 ".
Spec comparison
Display
| Spec | LG - B5 OLED 65 | LG - C5 OLED 77 |
|---|---|---|
| Screen sizeⓘ | 65 " | 77 "lead |
| Panel typeⓘ | OLED | OLED |
| Resolutionⓘ | 4K | 4K |
| Refresh rateⓘ | 120 Hz | 144 Hzlead |
| Peak brightnessⓘ | 750 nits | 1300 nitslead |
HDR & Smart
| Spec | LG - B5 OLED 65 | LG - C5 OLED 77 |
|---|---|---|
| Dolby Visionⓘ | true | true |
| HDR10+ⓘ | false | false |
| Smart OS | webOS | webOS |
| Dolby Atmosⓘ | true | true |
Gaming
| Spec | LG - B5 OLED 65 | LG - C5 OLED 77 |
|---|---|---|
| HDMI 2.1 portsⓘ | 4 | 4 |
| VRRⓘ | true | true |
| ALLM | true | true |
Frequently asked
Which is brighter, B5 OLED 65 or C5 OLED 77?+
C5 OLED 77 peaks at 1300 nits vs 750 nits.
Which is better for gaming, B5 OLED 65 or C5 OLED 77?+
C5 OLED 77 offers 144Hz refresh and 4 HDMI 2.1 ports.
Does B5 OLED 65 or C5 OLED 77 support Dolby Vision?+
Both support Dolby Vision.
Spec-level deep dives
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