ASUS ROG Strix XG309CM vs Dell U2724D 27"
Side-by-side comparison of viewing distance, PPI, and specifications
Category Ranking
Pixel Density (PPI)67in category
ASUS ROG Strix XG309CM94 PPI #65
Dell U2724D 27"109 PPI #55
93 PPI224 PPI
HDR Peak Brightness67in category
ASUS ROG Strix XG309CM300 nits #65
Dell U2724D 27"600 nits #22
250 nits2000 nits
DCI-P3 Color Gamut
Dell U2724D 27"98% #31
79%100%
Refresh Rate
ASUS ROG Strix XG309CM220 Hz
Dell U2724D 27"120 Hz
StandardHighUltra
Summary
- Sharpness: advantage Dell U2724D 27" — Neither screen reaches retina quality at 65cm. The Dell U2724D 27" gets there at 80cm vs 93cm for the ASUS ROG Strix XG309CM.
- Brightness: advantage Dell U2724D 27" — Similar SDR brightness (300 vs 350 nits), but the Dell U2724D 27" leads in HDR peak (600 vs 300 nits).
Key Differences
| Specification | ASUS ROG Strix XG309CM | Dell U2724D 27" |
|---|---|---|
| Screen Size | 29.5" | 27" |
| Refresh Rate | 220 Hz | 120 Hz |
| Response Time | 1 ms GTG | 5 ms GTG |
| Color Gamut | sRGB 110% | sRGB 100% · DCI-P3 98% · Adobe RGB 87% |
| Resolution | 2560×1080 | 2560×1440 |
| Pixel Density (PPI) | 94 | 109 |
| Optimal Viewing Distance | 93cm | 80cm |
| SDR Brightness | 300 nits | 350 nits |
| HDR Peak Brightness | 300 nits | 600 nits |
| Contrast Ratio | 1:1,000 | 1:2,000 |
| Year | 2022 | 2023 |
All specifications
| Specification | ASUS ROG Strix XG309CM 2022 | Dell U2724D 27" 2023 |
|---|---|---|
| Screen Size | 29.5" (Better) | 27" |
| Resolution | 2560×1080 | 2560×1440 (Better) |
| Pixel Density (PPI) | 94 | 109 (Better) |
| Optimal Viewing Distance | 93cm | 80cm (Better) |
| Panel Type | IPS | IPS |
| Viewing Angle | 178° | 178° |
| Aspect Ratio | 21:9 | 16:9 |
| Refresh Rate | 220 Hz (Better) | 120 Hz |
| Variable Refresh Rate (VRR) | FreeSync Premium | None |
| Response Time | 1 ms GTG (Better) | 5 ms GTG |
| HDR Certification | None | None |
| SDR Brightness | 300 nits | 350 nits (Better) |
| HDR Peak Brightness | 300 nits | 600 nits (Better) |
| Contrast Ratio | 1:1,000 | 1:2,000 (Better) |
| Ports | 1x HDMI · 1x DP · USB-C · USB Hub | 1x HDMI · 1x DP · USB-C · USB Hub |
| USB-C Power Delivery | 15 W | — |
| Color Gamut | sRGB 110% (Better) | sRGB 100% · DCI-P3 98% · Adobe RGB 87% |
| Year | 2022 | 2023 (Better) |
Frequently Asked Questions
Which has better PPI: ASUS ROG Strix XG309CM or Dell U2724D 27"?
The Dell U2724D 27" has 109 PPI compared to 94 PPI for the ASUS ROG Strix XG309CM.
Which has a closer optimal viewing distance?
The Dell U2724D 27" requires 80cm 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 ASUS ROG Strix XG309CM 2022 · 94 PPI · 29.5" · 220 Hz
Alienware AW2725DF 27" 2024 · 110 PPI · 26.7" · 360 Hz
vs Dell U2724D 27" 2023 · 109 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
Alienware AW3225QF 32" 2024 · 139 PPI · 31.6" · 240 Hz
vs Dell U2724D 27" 2023 · 109 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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