Apple Studio Display XDR 27" vs ASUS ROG Strix XG309CM
Side-by-side comparison of viewing distance, PPI, and specifications
Apple Studio Display XDR 27"
27" · 5120×2880 · Mini-LED
Optimal Viewing Distance 40cm
Open in calculator →
Category Ranking
Pixel Density (PPI)67in category
Apple Studio Display XDR 27"218 PPI #5
ASUS ROG Strix XG309CM94 PPI #65
93 PPI224 PPI
HDR Peak Brightness67in category
Apple Studio Display XDR 27"2000 nits #1
ASUS ROG Strix XG309CM300 nits #65
250 nits2000 nits
DCI-P3 Color Gamut63in category
Apple Studio Display XDR 27"99% #2
79%100%
Refresh Rate
Apple Studio Display XDR 27"120 Hz
ASUS ROG Strix XG309CM220 Hz
StandardHighUltra
Summary
- Sharpness: advantage Apple Studio Display XDR 27" — At 65cm, the Apple Studio Display XDR 27" is retina (218 PPI) while the ASUS ROG Strix XG309CM is not — you need to sit at least 93cm away for pixel-free viewing.
- Brightness: advantage Apple Studio Display XDR 27" — The Apple Studio Display XDR 27" is 233% brighter in SDR (1000 vs 300 nits), a noticeable difference for outdoor readability. HDR peak: 2000 vs 300 nits.
Key Differences
| Specification | Apple Studio Display XDR 27" | ASUS ROG Strix XG309CM |
|---|---|---|
| Resolution | 5120×2880 | 2560×1080 |
| Pixel Density (PPI) | 218 | 94 |
| Optimal Viewing Distance | 40cm | 93cm |
| SDR Brightness | 1000 nits | 300 nits |
| HDR Peak Brightness | 2000 nits | 300 nits |
| Contrast Ratio | 1:1,000,000 | 1:1,000 |
| USB-C Power Delivery | 140 W | 15 W |
| Year | 2026 | 2022 |
| Screen Size | 27" | 29.5" |
| Refresh Rate | 120 Hz | 220 Hz |
| Response Time | 5 ms GTG | 1 ms GTG |
| Color Gamut | sRGB 100% · DCI-P3 99% · Adobe RGB 98% | sRGB 110% |
All specifications
| Specification | Apple Studio Display XDR 27" 2026 | ASUS ROG Strix XG309CM 2022 |
|---|---|---|
| Screen Size | 27" | 29.5" (Better) |
| Resolution | 5120×2880 (Better) | 2560×1080 |
| Pixel Density (PPI) | 218 (Better) | 94 |
| Optimal Viewing Distance | 40cm (Better) | 93cm |
| Panel Type | Mini-LED | IPS |
| Viewing Angle | 178° | 178° |
| Aspect Ratio | 16:9 | 21:9 |
| Refresh Rate | 120 Hz | 220 Hz (Better) |
| Variable Refresh Rate (VRR) | FreeSync | FreeSync Premium |
| Response Time | 5 ms GTG | 1 ms GTG (Better) |
| HDR Certification | None | None |
| SDR Brightness | 1000 nits (Better) | 300 nits |
| HDR Peak Brightness | 2000 nits (Better) | 300 nits |
| Contrast Ratio | 1:1,000,000 (Better) | 1:1,000 |
| Ports | USB-C · USB Hub | 1x HDMI · 1x DP · USB-C · USB Hub |
| USB-C Power Delivery | 140 W (Better) | 15 W |
| Color Gamut | sRGB 100% · DCI-P3 99% · Adobe RGB 98% | sRGB 110% (Better) |
| Year | 2026 (Better) | 2022 |
Frequently Asked Questions
Which has better PPI: Apple Studio Display XDR 27" or ASUS ROG Strix XG309CM?
The Apple Studio Display XDR 27" has 218 PPI compared to 94 PPI for the ASUS ROG Strix XG309CM.
Which has a closer optimal viewing distance?
The Apple Studio Display XDR 27" requires 40cm vs 93cm for the ASUS ROG Strix XG309CM to reach retina quality.
Related Comparisons
Alienware AW2725DF 27" 2024 · 110 PPI · 26.7" · 360 Hz
vs Apple Studio Display XDR 27" 2026 · 218 PPI · 27" · 120 Hz
Alienware AW2725DF 27" 2024 · 110 PPI · 26.7" · 360 Hz
vs ASUS ROG Strix XG309CM 2022 · 94 PPI · 29.5" · 220 Hz
Alienware AW3225QF 32" 2024 · 139 PPI · 31.6" · 240 Hz
vs Apple Studio Display XDR 27" 2026 · 218 PPI · 27" · 120 Hz
Alienware AW3225QF 32" 2024 · 139 PPI · 31.6" · 240 Hz
vs ASUS ROG Strix XG309CM 2022 · 94 PPI · 29.5" · 220 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).
Last updated: