ASUS ROG Swift OLED PG27UCDM 27" vs Dell S2725QS
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 S2725QS163 PPI #20
93 PPI224 PPI
HDR Peak Brightness67in category
ASUS ROG Swift OLED PG27UCDM 27"1000 nits #7
Dell S2725QS350 nits #61
250 nits2000 nits
DCI-P3 Color Gamut63in category
ASUS ROG Swift OLED PG27UCDM 27"99% #2
Dell S2725QS95% #48
79%100%
Refresh Rate
ASUS ROG Swift OLED PG27UCDM 27"240 Hz
Dell S2725QS120 Hz
StandardHighUltra
Summary
- Sharpness: identical — Both screens are retina at 65cm. With nearly identical pixel density (166 vs 163 PPI), there is no visible difference in sharpness.
- Brightness: advantage Dell S2725QS — The Dell S2725QS is 40% brighter in SDR (350 vs 250 nits), a noticeable difference for outdoor readability. HDR peak: 350 vs 1000 nits.
Key Differences
| Specification | ASUS ROG Swift OLED PG27UCDM 27" | Dell S2725QS |
|---|---|---|
| Pixel Density (PPI) | 166 | 163 |
| Optimal Viewing Distance | 53cm | 54cm |
| Refresh Rate | 240 Hz | 120 Hz |
| Response Time | 0.0 ms GTG | 5 ms GTG |
| HDR Peak Brightness | 1000 nits | 350 nits |
| Contrast Ratio | 1:1,500,000 | 1:1,500 |
| Color Gamut | sRGB 145% · DCI-P3 99% · Adobe RGB 94% | sRGB 99% · DCI-P3 95% |
| Screen Size | 26.5" | 27" |
| SDR Brightness | 250 nits | 350 nits |
All specifications
| Specification | ASUS ROG Swift OLED PG27UCDM 27" 2025 | Dell S2725QS 2025 |
|---|---|---|
| Screen Size | 26.5" | 27" (Better) |
| Resolution | 3840×2160 | 3840×2160 |
| Pixel Density (PPI) | 166 (Better) | 163 |
| Optimal Viewing Distance | 53cm (Better) | 54cm |
| Panel Type | QD-OLED | IPS |
| Viewing Angle | 178° | 178° |
| Aspect Ratio | 16:9 | 16:9 |
| 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 | None |
| SDR Brightness | 250 nits | 350 nits (Better) |
| HDR Peak Brightness | 1000 nits (Better) | 350 nits |
| Contrast Ratio | 1:1,500,000 (Better) | 1:1,500 |
| Ports | 2x HDMI · 1x DP · USB-C · USB Hub | 2x HDMI · 1x DP |
| USB-C Power Delivery | 90 W | — |
| Color Gamut | sRGB 145% · DCI-P3 99% · Adobe RGB 94% (Better) | sRGB 99% · DCI-P3 95% |
| Year | 2025 | 2025 |
Frequently Asked Questions
Which has better PPI: ASUS ROG Swift OLED PG27UCDM 27" or Dell S2725QS?
The ASUS ROG Swift OLED PG27UCDM 27" has 166 PPI compared to 163 PPI for the Dell S2725QS.
Which has a closer optimal viewing distance?
The ASUS ROG Swift OLED PG27UCDM 27" requires 53cm vs 54cm for the Dell S2725QS 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 S2725QS 2025 · 163 PPI · 27" · 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 S2725QS 2025 · 163 PPI · 27" · 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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