AOC U27G4R 27" vs Dell UltraSharp U4025QW
Side-by-side comparison of viewing distance, PPI, and specifications
Category Ranking
Pixel Density (PPI)67in category
AOC U27G4R 27"163 PPI #20
Dell UltraSharp U4025QW140 PPI #30
93 PPI224 PPI
HDR Peak Brightness67in category
AOC U27G4R 27"400 nits #51
Dell UltraSharp U4025QW600 nits #22
250 nits2000 nits
DCI-P3 Color Gamut63in category
AOC U27G4R 27"95.9% #47
Dell UltraSharp U4025QW99% #2
79%100%
Refresh Rate
AOC U27G4R 27"160 Hz
Dell UltraSharp U4025QW120 Hz
StandardHighUltra
Summary
- Sharpness: no visible difference — Both screens exceed the retina threshold at 65cm. The AOC U27G4R 27" has 17% higher pixel density (163 vs 140 PPI), but this only becomes visible below 54cm.
- Brightness: advantage Dell UltraSharp U4025QW — Similar SDR brightness (400 vs 450 nits), but the Dell UltraSharp U4025QW leads in HDR peak (600 vs 400 nits).
Key Differences
| Specification | AOC U27G4R 27" | Dell UltraSharp U4025QW |
|---|---|---|
| Pixel Density (PPI) | 163 | 140 |
| Optimal Viewing Distance | 54cm | 62cm |
| Refresh Rate | 160 Hz | 120 Hz |
| Color Gamut | sRGB 124.7% · DCI-P3 95.9% · Adobe RGB 93.4% | sRGB 100% · DCI-P3 99% · Adobe RGB 96% |
| Screen Size | 27" | 39.7" |
| Resolution | 3840×2160 | 5120×2160 |
| SDR Brightness | 400 nits | 450 nits |
| HDR Peak Brightness | 400 nits | 600 nits |
| Contrast Ratio | 1:1,000 | 1:2,000 |
All specifications
| Specification | AOC U27G4R 27" 2024 | Dell UltraSharp U4025QW 2024 |
|---|---|---|
| Screen Size | 27" | 39.7" (Better) |
| Resolution | 3840×2160 | 5120×2160 (Better) |
| Pixel Density (PPI) | 163 (Better) | 140 |
| Optimal Viewing Distance | 54cm (Better) | 62cm |
| Panel Type | IPS | IPS |
| Viewing Angle | 178° | 178° |
| Aspect Ratio | 16:9 | 21:9 |
| Refresh Rate | 160 Hz (Better) | 120 Hz |
| Variable Refresh Rate (VRR) | G-SYNC Compatible | FreeSync Premium |
| Response Time | 0.5 ms MPRT | 5 ms GTG |
| HDR Certification | DisplayHDR 400 | DisplayHDR 600 |
| SDR Brightness | 400 nits | 450 nits (Better) |
| HDR Peak Brightness | 400 nits | 600 nits (Better) |
| Contrast Ratio | 1:1,000 | 1:2,000 (Better) |
| Ports | 2x HDMI · 1x DP · USB Hub | 1x HDMI · 1x DP · USB-C · USB Hub |
| USB-C Power Delivery | — | 140 W |
| Color Gamut | sRGB 124.7% · DCI-P3 95.9% · Adobe RGB 93.4% (Better) | sRGB 100% · DCI-P3 99% · Adobe RGB 96% |
| Year | 2024 | 2024 |
Frequently Asked Questions
Which has better PPI: AOC U27G4R 27" or Dell UltraSharp U4025QW?
The AOC U27G4R 27" has 163 PPI compared to 140 PPI for the Dell UltraSharp U4025QW.
Which has a closer optimal viewing distance?
The AOC U27G4R 27" requires 54cm vs 62cm for the Dell UltraSharp U4025QW to reach retina quality.
Related Comparisons
Alienware AW2725DF 27" 2024 · 110 PPI · 26.7" · 360 Hz
vs AOC U27G4R 27" 2024 · 163 PPI · 27" · 160 Hz
Alienware AW2725DF 27" 2024 · 110 PPI · 26.7" · 360 Hz
vs Dell UltraSharp U4025QW 2024 · 140 PPI · 39.7" · 120 Hz
Alienware AW3225QF 32" 2024 · 139 PPI · 31.6" · 240 Hz
vs AOC U27G4R 27" 2024 · 163 PPI · 27" · 160 Hz
Alienware AW3225QF 32" 2024 · 139 PPI · 31.6" · 240 Hz
vs Dell UltraSharp U4025QW 2024 · 140 PPI · 39.7" · 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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