LG OLED55B5PUA vs Samsung UN65CU8000FXZA
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Choosing between the LG OLED55B5PUA and Samsung UN65CU8000FXZA? Both compete in the TV segment. Here’s how they compare across the specs that matter most for your home theater.
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Looking at overall performance dimensions: The LG OLED55B5PUA scores higher in video quality, gaming performance, form factor, room fit, future-proofing. The Samsung UN65CU8000FXZA leads in value. They score similarly in ease of use.
On the display side, the LG OLED55B5PUA uses a WOLED panel while the Samsung UN65CU8000FXZA uses LED, and screen sizes differ at 55" vs 65". OLED panels produce perfect blacks by turning pixels off entirely. QD-OLED adds a quantum dot layer for wider color. VA panels offer better contrast than IPS but narrower viewing angles. Mini-LED is a backlight technology applied to LCD panels, offering thousands of dimming zones for improved contrast. Bigger isn't always better — it depends on viewing distance. THX recommends a 36-degree viewing angle; SMPTE suggests 30 degrees minimum. Our viewing distance calculator helps find the sweet spot.
The LG OLED55B5PUA holds an advantage across more performance dimensions, but the Samsung UN65CU8000FXZA may still be the better pick depending on which specs matter most to your setup. See the detailed comparison table below for the full breakdown.
For most home theaters, the LG OLED55B5PUA is the stronger choice — it leads in 5 of 7 scored dimensions. The Samsung UN65CU8000FXZA makes more sense if you prioritize the 1 dimension where it leads.
Performance Overview
Scores based on specs and category benchmarks (0–100 scale)
Detailed Specifications
| Specification | ||
|---|---|---|
| Price | N/A | N/A |
| Screen Size | 55" | 65" |
| Resolution | 4K | 4K |
| Panel Type | WOLED | LED |
| Backlight Type | none | direct-lit |
| Native Contrast Ratio | Infinite | Mega Contrast |
| HDR Formats | HDR10, Dolby Vision, HLG | HDR10, HDR10+, HLG |
| Refresh Rate | 120Hz | 60Hz |
| VRR | Yes | No |
| VRR Type | FreeSync+G-Sync | — |
| ALLM | Yes | Yes |
| Smart OS | webOS | Tizen |
| Speaker Config | 2.0 | Speaker Type -?Mechanism in TV that outputs audio. Down firing enhances bass by directing low-end toward ground. |
| Dolby Atmos (Speakers) | Yes | No |
| HDMI Total Ports | 4 | 3 |
| HDMI 2.1 Ports | 4 | 0 |
| eARC Port | Yes | No |
| VESA Pattern | 300x200 | Vesa Wall Mount Compatibility -?Wall mount size standard (VESA) that supports extending, pivoting, or tilting the TV. |
| Processor | α8 AI Processor 4K Gen2 | Crystal Processor 4K |
| Model Year | — | 2023 |
Key Differences
- Series Name: LG OLED55B5PUA at B5 vs Samsung UN65CU8000FXZA at CU8000
- Processor: LG OLED55B5PUA at α8 AI Processor 4K Gen2 vs Samsung UN65CU8000FXZA at Crystal Processor 4K
- HDR Formats: LG OLED55B5PUA at HDR10, Dolby Vision, HLG vs Samsung UN65CU8000FXZA at HDR10, HDR10+, HLG. Dolby Vision adds dynamic metadata that adjusts brightness scene-by-scene. HDR10 is the baseline. HDR10+ is Samsung's alternative to Dolby Vision.
- USB Type: LG OLED55B5PUA at 2ea (v 2.0) vs Samsung UN65CU8000FXZA at 2
- Panel Type: LG OLED55B5PUA at WOLED vs Samsung UN65CU8000FXZA at LED. OLED panels produce perfect blacks by turning pixels off entirely. QD-OLED adds a quantum dot layer for wider color. VA panels offer better contrast than IPS but narrower viewing angles. Mini-LED is a backlight technology applied to LCD panels, offering thousands of dimming zones for improved contrast.
Which Should You Choose?
Choose LG OLED55B5PUA if you want:
- + better refresh rate — 120 Hz provides noticeably smoother motion for sports and gaming
- + better native refresh rate
- + better hdmi total ports
- + better hdmi 2.1 ports — hDMI 2
Choose Samsung UN65CU8000FXZA if you want:
- + larger 65" screen for more immersive viewing
See Where These Rank
Check our editorial rankings to see how LG OLED55B5PUA and Samsung UN65CU8000FXZA compare to the rest of the field.
Best TV RankingsRelated Calculators
Specifications sourced from manufacturer datasheets and verified against retailer listings. Prices updated hourly from authorized retailers. Scoring uses our open methodology — products are never ranked, promoted, or suppressed based on affiliate commission rates.
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