Samsung QN900D 8K 75" vs TCL QM7K 65"
Side-by-side comparison of viewing distance, PPI, and specifications
Category Ranking
Pixel Density (PPI)28in category
Samsung QN900D 8K 75"118 PPI #1
TCL QM7K 65"68 PPI #8
57 PPI118 PPI
HDR Peak Brightness28in category
Samsung QN900D 8K 75"2445 nits #6
TCL QM7K 65"1700 nits #13
677 nits5000 nits
DCI-P3 Color Gamut28in category
Samsung QN900D 8K 75"95% #25
TCL QM7K 65"97% #15
94%100%
Refresh Rate
Samsung QN900D 8K 75"120 Hz
TCL QM7K 65"144 Hz
StandardHighUltra
Summary
- Sharpness: no visible difference — Both screens exceed the retina threshold at 250cm. The Samsung QN900D 8K 75" has 73% higher pixel density (118 vs 68 PPI), but this only becomes visible below 74cm.
- Brightness: advantage Samsung QN900D 8K 75" — Similar SDR brightness (500 vs 550 nits), but the Samsung QN900D 8K 75" leads in HDR peak (2445 vs 1700 nits).
Key Differences
| Specification | Samsung QN900D 8K 75" | TCL QM7K 65" |
|---|---|---|
| Screen Size | 75" | 65" |
| Resolution | 7680×4320 | 3840×2160 |
| Pixel Density (PPI) | 118 | 68 |
| Optimal Viewing Distance | 74cm | 1.3m |
| HDR Peak Brightness | 2445 nits | 1700 nits |
| Refresh Rate | 120 Hz | 144 Hz |
| Response Time | 7.8 ms GTG | 6 ms GTG |
| SDR Brightness | 500 nits | 550 nits |
| Contrast Ratio | 1:1,600 | 1:5,000 |
| Color Gamut | sRGB 100% · DCI-P3 95% · Adobe RGB 88% | sRGB 100% · DCI-P3 97% · Adobe RGB 90% |
| Year | 2024 | 2025 |
All specifications
| Specification | Samsung QN900D 8K 75" 2024 | TCL QM7K 65" 2025 |
|---|---|---|
| Screen Size | 75" (Better) | 65" |
| Resolution | 7680×4320 (Better) | 3840×2160 |
| Pixel Density (PPI) | 118 (Better) | 68 |
| Optimal Viewing Distance | 74cm (Better) | 1.3m |
| Panel Type | Mini-LED | Mini-LED |
| Viewing Angle | 178° | 178° |
| Aspect Ratio | 16:9 | 16:9 |
| Refresh Rate | 120 Hz | 144 Hz (Better) |
| Variable Refresh Rate (VRR) | FreeSync Premium Pro | FreeSync Premium Pro |
| Response Time | 7.8 ms GTG | 6 ms GTG (Better) |
| HDR Certification | None | None |
| SDR Brightness | 500 nits | 550 nits (Better) |
| HDR Peak Brightness | 2445 nits (Better) | 1700 nits |
| Contrast Ratio | 1:1,600 | 1:5,000 (Better) |
| Ports | 4x HDMI | 4x HDMI |
| Color Gamut | sRGB 100% · DCI-P3 95% · Adobe RGB 88% | sRGB 100% · DCI-P3 97% · Adobe RGB 90% (Better) |
| Year | 2024 | 2025 (Better) |
Frequently Asked Questions
Which has better PPI: Samsung QN900D 8K 75" or TCL QM7K 65"?
The Samsung QN900D 8K 75" has 118 PPI compared to 68 PPI for the TCL QM7K 65".
Which has a closer optimal viewing distance?
The Samsung QN900D 8K 75" requires 74cm vs 1.3m for the TCL QM7K 65" to reach retina quality.
Related Comparisons
Hisense U7N 75" 2024 · 59 PPI · 75" · 144 Hz
vs Samsung QN900D 8K 75" 2024 · 118 PPI · 75" · 120 Hz
Hisense U7N 75" 2024 · 59 PPI · 75" · 144 Hz
vs TCL QM7K 65" 2025 · 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
Hisense U8N 55" 2024 · 80 PPI · 55" · 144 Hz
vs TCL QM7K 65" 2025 · 68 PPI · 65" · 144 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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