ASUS ROG Swift OLED PG27UCDM 27" vs ASUS ROG Swift PG42UQ 42"
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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ASUS ROG Swift PG42UQ 42"
41.5" · 3840×2160 · OLED
Optimal Viewing Distance 82cm
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Advantages of ASUS ROG Swift OLED PG27UCDM 27"
| Specification | ASUS ROG Swift OLED PG27UCDM 27" | ASUS ROG Swift PG42UQ 42" |
|---|---|---|
| Pixel Density (PPI) | 166 | 106 |
| Optimal Viewing Distance | 53cm | 82cm |
| Refresh Rate | 240 Hz | 138 Hz |
| Response Time | 0.0 ms GTG | 0.1 ms GTG |
| Contrast Ratio | 1:1,500,000 | 1:1,000,000 |
| Color Gamut | sRGB 145% · DCI-P3 99% · Adobe RGB 94% | sRGB 133% · DCI-P3 98% · Adobe RGB 94% |
| Year | 2025 | 2022 |
Advantages of ASUS ROG Swift PG42UQ 42"
| Specification | ASUS ROG Swift OLED PG27UCDM 27" | ASUS ROG Swift PG42UQ 42" |
|---|---|---|
| Screen Size | 26.5" | 41.5" |
| SDR Brightness | 250 nits | 450 nits |
Identical
| Specification | ASUS ROG Swift OLED PG27UCDM 27" | ASUS ROG Swift PG42UQ 42" |
|---|---|---|
| Resolution | 3840×2160 | 3840×2160 |
| Panel Type | QD-OLED | OLED |
| Viewing Angle | 178° | 178° |
| Aspect Ratio | 16:9 | 16:9 |
| Variable Refresh Rate (VRR) | FreeSync Premium Pro | G-SYNC Compatible |
| HDR Certification | DisplayHDR True Black 400 | None |
| HDR Peak Brightness | 1000 nits | 1000 nits |
| Ports | 2x HDMI · 1x DP · USB-C · USB Hub | 4x HDMI · 1x DP · USB Hub |
| USB-C Power Delivery | 90 W | — |
Summary
Sharpness: advantage ASUS ROG Swift OLED PG27UCDM 27"
At 65cm, the ASUS ROG Swift OLED PG27UCDM 27" is retina (166 PPI) while the ASUS ROG Swift PG42UQ 42" is not — you need to sit at least 82cm away for pixel-free viewing.
Brightness: advantage ASUS ROG Swift PG42UQ 42"
The ASUS ROG Swift PG42UQ 42" is 80% brighter in SDR (450 vs 250 nits), a noticeable difference for outdoor readability. HDR peak: 1000 vs 1000 nits.
All specifications
| Specification | ASUS ROG Swift OLED PG27UCDM 27" 2025 | ASUS ROG Swift PG42UQ 42" 2022 |
|---|---|---|
| Screen Size | 26.5" | 41.5" (Better) |
| Resolution | 3840×2160 | 3840×2160 |
| Pixel Density (PPI) | 166 (Better) | 106 |
| Optimal Viewing Distance | 53cm (Better) | 82cm |
| Panel Type | QD-OLED | OLED |
| Viewing Angle | 178° | 178° |
| Aspect Ratio | 16:9 | 16:9 |
| Refresh Rate | 240 Hz (Better) | 138 Hz |
| Variable Refresh Rate (VRR) | FreeSync Premium Pro | G-SYNC Compatible |
| Response Time | 0.0 ms GTG (Better) | 0.1 ms GTG |
| HDR Certification | DisplayHDR True Black 400 | None |
| SDR Brightness | 250 nits | 450 nits (Better) |
| HDR Peak Brightness | 1000 nits | 1000 nits |
| Contrast Ratio | 1:1,500,000 (Better) | 1:1,000,000 |
| Ports | 2x HDMI · 1x DP · USB-C · USB Hub | 4x HDMI · 1x DP · USB Hub |
| USB-C Power Delivery | 90 W | — |
| Color Gamut | sRGB 145% · DCI-P3 99% · Adobe RGB 94% (Better) | sRGB 133% · DCI-P3 98% · Adobe RGB 94% |
| Year | 2025 (Better) | 2022 |
Frequently Asked Questions
Which has better PPI: ASUS ROG Swift OLED PG27UCDM 27" or ASUS ROG Swift PG42UQ 42"?
The ASUS ROG Swift OLED PG27UCDM 27" has 166 PPI compared to 106 PPI for the ASUS ROG Swift PG42UQ 42".
Which has a closer optimal viewing distance?
The ASUS ROG Swift OLED PG27UCDM 27" requires 53cm vs 82cm for the ASUS ROG Swift PG42UQ 42" to reach retina quality.
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).
Last updated:
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