ASUS ROG Swift OLED PG27UCDM 27" vs Dell UltraSharp U4025QW
Side-by-side comparison of viewing distance, PPI, and specifications
ASUS ROG Swift OLED PG27UCDM 27"
26.5" · 3840×2160 · QD-OLED
Optimal Viewing Distance 53cm
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Category Ranking
Pixel Density (PPI)67in category
ASUS ROG Swift OLED PG27UCDM 27"166 PPI #16
Dell UltraSharp U4025QW140 PPI #30
93 PPI224 PPI
HDR Peak Brightness67in category
ASUS ROG Swift OLED PG27UCDM 27"1000 nits #7
Dell UltraSharp U4025QW600 nits #22
250 nits2000 nits
DCI-P3 Color Gamut63in category
ASUS ROG Swift OLED PG27UCDM 27"99% #2
Dell UltraSharp U4025QW99% #2
79%100%
Refresh Rate
ASUS ROG Swift OLED PG27UCDM 27"240 Hz
Dell UltraSharp U4025QW120 Hz
StandardHighUltra
Summary
- Sharpness: no visible difference — Both screens exceed the retina threshold at 65cm. The ASUS ROG Swift OLED PG27UCDM 27" has 19% higher pixel density (166 vs 140 PPI), but this only becomes visible below 53cm.
- Brightness: advantage Dell UltraSharp U4025QW — The Dell UltraSharp U4025QW is 80% brighter in SDR (450 vs 250 nits), a noticeable difference for outdoor readability. HDR peak: 600 vs 1000 nits.
Key Differences
| Specification | ASUS ROG Swift OLED PG27UCDM 27" | Dell UltraSharp U4025QW |
|---|---|---|
| Pixel Density (PPI) | 166 | 140 |
| Optimal Viewing Distance | 53cm | 62cm |
| Refresh Rate | 240 Hz | 120 Hz |
| Response Time | 0.0 ms GTG | 5 ms GTG |
| HDR Peak Brightness | 1000 nits | 600 nits |
| Contrast Ratio | 1:1,500,000 | 1:2,000 |
| Color Gamut | sRGB 145% · DCI-P3 99% · Adobe RGB 94% | sRGB 100% · DCI-P3 99% · Adobe RGB 96% |
| Year | 2025 | 2024 |
| Screen Size | 26.5" | 39.7" |
| Resolution | 3840×2160 | 5120×2160 |
| SDR Brightness | 250 nits | 450 nits |
| USB-C Power Delivery | 90 W | 140 W |
All specifications
| Specification | ASUS ROG Swift OLED PG27UCDM 27" 2025 | Dell UltraSharp U4025QW 2024 |
|---|---|---|
| Screen Size | 26.5" | 39.7" (Better) |
| Resolution | 3840×2160 | 5120×2160 (Better) |
| Pixel Density (PPI) | 166 (Better) | 140 |
| Optimal Viewing Distance | 53cm (Better) | 62cm |
| Panel Type | QD-OLED | IPS |
| Viewing Angle | 178° | 178° |
| Aspect Ratio | 16:9 | 21:9 |
| Refresh Rate | 240 Hz (Better) | 120 Hz |
| Variable Refresh Rate (VRR) | FreeSync Premium Pro | FreeSync Premium |
| Response Time | 0.0 ms GTG (Better) | 5 ms GTG |
| HDR Certification | DisplayHDR True Black 400 | DisplayHDR 600 |
| SDR Brightness | 250 nits | 450 nits (Better) |
| HDR Peak Brightness | 1000 nits (Better) | 600 nits |
| Contrast Ratio | 1:1,500,000 (Better) | 1:2,000 |
| Ports | 2x HDMI · 1x DP · USB-C · USB Hub | 1x HDMI · 1x DP · USB-C · USB Hub |
| USB-C Power Delivery | 90 W | 140 W (Better) |
| Color Gamut | sRGB 145% · DCI-P3 99% · Adobe RGB 94% (Better) | sRGB 100% · DCI-P3 99% · Adobe RGB 96% |
| Year | 2025 (Better) | 2024 |
Frequently Asked Questions
Which has better PPI: ASUS ROG Swift OLED PG27UCDM 27" or Dell UltraSharp U4025QW?
The ASUS ROG Swift OLED PG27UCDM 27" has 166 PPI compared to 140 PPI for the Dell UltraSharp U4025QW.
Which has a closer optimal viewing distance?
The ASUS ROG Swift OLED PG27UCDM 27" requires 53cm vs 62cm for the Dell UltraSharp U4025QW to reach retina quality.
Related Comparisons
Alienware AW2725DF 27" 2024 · 110 PPI · 26.7" · 360 Hz
vs ASUS ROG Swift OLED PG27UCDM 27" 2025 · 166 PPI · 26.5" · 240 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 ASUS ROG Swift OLED PG27UCDM 27" 2025 · 166 PPI · 26.5" · 240 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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