ASUS ROG Swift OLED PG27UCDM 27" vs Dell S3225QC
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 S3225QC139 PPI #41
93 PPI224 PPI
HDR Peak Brightness67in category
ASUS ROG Swift OLED PG27UCDM 27"1000 nits #7
Dell S3225QC1000 nits #7
250 nits2000 nits
DCI-P3 Color Gamut63in category
ASUS ROG Swift OLED PG27UCDM 27"99% #2
Dell S3225QC99% #2
79%100%
Refresh Rate
ASUS ROG Swift OLED PG27UCDM 27"240 Hz
Dell S3225QC120 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 139 PPI), but this only becomes visible below 53cm.
- Brightness: comparable — Both screens offer similar brightness (250 vs 250 nits SDR). Neither has a meaningful advantage for outdoor use.
Key Differences
| Specification | ASUS ROG Swift OLED PG27UCDM 27" | Dell S3225QC |
|---|---|---|
| Pixel Density (PPI) | 166 | 139 |
| Optimal Viewing Distance | 53cm | 63cm |
| Refresh Rate | 240 Hz | 120 Hz |
| Color Gamut | sRGB 145% · DCI-P3 99% · Adobe RGB 94% | sRGB 100% · DCI-P3 99% · Adobe RGB 95% |
| Screen Size | 26.5" | 31.6" |
All specifications
| Specification | ASUS ROG Swift OLED PG27UCDM 27" 2025 | Dell S3225QC 2025 |
|---|---|---|
| Screen Size | 26.5" | 31.6" (Better) |
| Resolution | 3840×2160 | 3840×2160 |
| Pixel Density (PPI) | 166 (Better) | 139 |
| Optimal Viewing Distance | 53cm (Better) | 63cm |
| Panel Type | QD-OLED | QD-OLED |
| 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 | 0.0 ms GTG |
| HDR Certification | DisplayHDR True Black 400 | DisplayHDR True Black 400 |
| SDR Brightness | 250 nits | 250 nits |
| HDR Peak Brightness | 1000 nits | 1000 nits |
| Contrast Ratio | 1:1,500,000 | 1:1,500,000 |
| Ports | 2x HDMI · 1x DP · USB-C · USB Hub | 1x HDMI · USB-C · USB Hub |
| USB-C Power Delivery | 90 W | 90 W |
| Color Gamut | sRGB 145% · DCI-P3 99% · Adobe RGB 94% (Better) | sRGB 100% · DCI-P3 99% · Adobe RGB 95% |
| Year | 2025 | 2025 |
Frequently Asked Questions
Which has better PPI: ASUS ROG Swift OLED PG27UCDM 27" or Dell S3225QC?
The ASUS ROG Swift OLED PG27UCDM 27" has 166 PPI compared to 139 PPI for the Dell S3225QC.
Which has a closer optimal viewing distance?
The ASUS ROG Swift OLED PG27UCDM 27" requires 53cm vs 63cm for the Dell S3225QC 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 S3225QC 2025 · 139 PPI · 31.6" · 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 S3225QC 2025 · 139 PPI · 31.6" · 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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