LG C4 65" vs Samsung QN900D 8K 75"
Side-by-side comparison of viewing distance, PPI, and specifications
Category Ranking
Pixel Density (PPI)28in category
LG C4 65"68 PPI #8
Samsung QN900D 8K 75"118 PPI #1
57 PPI118 PPI
HDR Peak Brightness28in category
LG C4 65"1049 nits #24
Samsung QN900D 8K 75"2445 nits #6
677 nits5000 nits
DCI-P3 Color Gamut28in category
LG C4 65"98.7% #10
Samsung QN900D 8K 75"95% #25
94%100%
Refresh Rate
LG C4 65"144 Hz
Samsung QN900D 8K 75"120 Hz
StandardHighUltra
Summary
- Sharpness: no visible difference — Both screens exceed the retina threshold at 250cm. The Samsung QN900D 8K 75" has 42% higher pixel density (118 vs 68 PPI), but this only becomes visible below 74cm.
- Brightness: advantage Samsung QN900D 8K 75" — The Samsung QN900D 8K 75" is 69% brighter in SDR (500 vs 296 nits), a noticeable difference for outdoor readability. HDR peak: 2445 vs 1049 nits.
Key Differences
| Specification | LG C4 65" | Samsung QN900D 8K 75" |
|---|---|---|
| Refresh Rate | 144 Hz | 120 Hz |
| Response Time | 0.1 ms GTG | 7.8 ms GTG |
| Contrast Ratio | 1:1,000,000 | 1:1,600 |
| Color Gamut | sRGB 100% · DCI-P3 98.7% · Adobe RGB 96% | sRGB 100% · DCI-P3 95% · Adobe RGB 88% |
| Screen Size | 65" | 75" |
| Resolution | 3840×2160 | 7680×4320 |
| Pixel Density (PPI) | 68 | 118 |
| Optimal Viewing Distance | 1.3m | 74cm |
| SDR Brightness | 296 nits | 500 nits |
| HDR Peak Brightness | 1049 nits | 2445 nits |
All specifications
| Specification | LG C4 65" 2024 | Samsung QN900D 8K 75" 2024 |
|---|---|---|
| Screen Size | 65" | 75" (Better) |
| Resolution | 3840×2160 | 7680×4320 (Better) |
| Pixel Density (PPI) | 68 | 118 (Better) |
| Optimal Viewing Distance | 1.3m | 74cm (Better) |
| Panel Type | OLED | Mini-LED |
| Viewing Angle | 178° | 178° |
| Aspect Ratio | 16:9 | 16:9 |
| Refresh Rate | 144 Hz (Better) | 120 Hz |
| Variable Refresh Rate (VRR) | FreeSync Premium | FreeSync Premium Pro |
| Response Time | 0.1 ms GTG (Better) | 7.8 ms GTG |
| HDR Certification | None | None |
| SDR Brightness | 296 nits | 500 nits (Better) |
| HDR Peak Brightness | 1049 nits | 2445 nits (Better) |
| Contrast Ratio | 1:1,000,000 (Better) | 1:1,600 |
| Ports | 4x HDMI | 4x HDMI |
| Color Gamut | sRGB 100% · DCI-P3 98.7% · Adobe RGB 96% (Better) | sRGB 100% · DCI-P3 95% · Adobe RGB 88% |
| Year | 2024 | 2024 |
Frequently Asked Questions
Which has better PPI: LG C4 65" or Samsung QN900D 8K 75"?
The Samsung QN900D 8K 75" has 118 PPI compared to 68 PPI for the LG C4 65".
Which has a closer optimal viewing distance?
The Samsung QN900D 8K 75" requires 74cm vs 1.3m for the LG C4 65" to reach retina quality.
Related Comparisons
Hisense U7N 75" 2024 · 59 PPI · 75" · 144 Hz
vs LG C4 65" 2024 · 68 PPI · 65" · 144 Hz
Hisense U7N 75" 2024 · 59 PPI · 75" · 144 Hz
vs Samsung QN900D 8K 75" 2024 · 118 PPI · 75" · 120 Hz
Hisense U8N 55" 2024 · 80 PPI · 55" · 144 Hz
vs LG C4 65" 2024 · 68 PPI · 65" · 144 Hz
Hisense U8N 55" 2024 · 80 PPI · 55" · 144 Hz
vs Samsung QN900D 8K 75" 2024 · 118 PPI · 75" · 120 Hz
Methodology & Sources
Formula: Retina distance (cm) = 3438 / PPI. Displayed values are rounded for readability.
Sources: Official manufacturer spec sheets and product pages. Specs are normalized before comparisons.
Comparison winners are calculated metric by metric (higher is better for most specs; lower is better for distance/response time).
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