Apple Studio Display XDR 27" vs LG UltraGear 45GX950A 45"
Side-by-side comparison of viewing distance, PPI, and specifications
Apple Studio Display XDR 27"
27" · 5120×2880 · Mini-LED
Optimal Viewing Distance 40cm
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LG UltraGear 45GX950A 45"
44.5" · 5120×2160 · OLED
Optimal Viewing Distance 70cm
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Category Ranking
Pixel Density (PPI)67in category
Apple Studio Display XDR 27"218 PPI #5
LG UltraGear 45GX950A 45"125 PPI #44
93 PPI224 PPI
HDR Peak Brightness67in category
Apple Studio Display XDR 27"2000 nits #1
LG UltraGear 45GX950A 45"1300 nits #3
250 nits2000 nits
DCI-P3 Color Gamut63in category
Apple Studio Display XDR 27"99% #2
LG UltraGear 45GX950A 45"98% #31
79%100%
Refresh Rate
Apple Studio Display XDR 27"120 Hz
LG UltraGear 45GX950A 45"165 Hz
StandardHighUltra
Summary
- Sharpness: advantage Apple Studio Display XDR 27" — At 65cm, the Apple Studio Display XDR 27" is retina (218 PPI) while the LG UltraGear 45GX950A 45" is not — you need to sit at least 70cm away for pixel-free viewing.
- Brightness: advantage Apple Studio Display XDR 27" — The Apple Studio Display XDR 27" is 264% brighter in SDR (1000 vs 275 nits), a noticeable difference for outdoor readability. HDR peak: 2000 vs 1300 nits.
Key Differences
| Specification | Apple Studio Display XDR 27" | LG UltraGear 45GX950A 45" |
|---|---|---|
| Resolution | 5120×2880 | 5120×2160 |
| Pixel Density (PPI) | 218 | 125 |
| Optimal Viewing Distance | 40cm | 70cm |
| SDR Brightness | 1000 nits | 275 nits |
| HDR Peak Brightness | 2000 nits | 1300 nits |
| USB-C Power Delivery | 140 W | 90 W |
| Color Gamut | sRGB 100% · DCI-P3 99% · Adobe RGB 98% | sRGB 100% · DCI-P3 98% · Adobe RGB 94% |
| Year | 2026 | 2025 |
| Screen Size | 27" | 44.5" |
| Refresh Rate | 120 Hz | 165 Hz |
| Response Time | 5 ms GTG | 0.0 ms GTG |
| Contrast Ratio | 1:1,000,000 | 1:1,500,000 |
All specifications
| Specification | Apple Studio Display XDR 27" 2026 | LG UltraGear 45GX950A 45" 2025 |
|---|---|---|
| Screen Size | 27" | 44.5" (Better) |
| Resolution | 5120×2880 (Better) | 5120×2160 |
| Pixel Density (PPI) | 218 (Better) | 125 |
| Optimal Viewing Distance | 40cm (Better) | 70cm |
| Panel Type | Mini-LED | OLED |
| Viewing Angle | 178° | 178° |
| Aspect Ratio | 16:9 | 21:9 |
| Refresh Rate | 120 Hz | 165 Hz (Better) |
| Variable Refresh Rate (VRR) | FreeSync | FreeSync Premium Pro |
| Response Time | 5 ms GTG | 0.0 ms GTG (Better) |
| HDR Certification | None | DisplayHDR True Black 400 |
| SDR Brightness | 1000 nits (Better) | 275 nits |
| HDR Peak Brightness | 2000 nits (Better) | 1300 nits |
| Contrast Ratio | 1:1,000,000 | 1:1,500,000 (Better) |
| Ports | USB-C · USB Hub | 2x HDMI · 1x DP · USB-C · USB Hub |
| USB-C Power Delivery | 140 W (Better) | 90 W |
| Color Gamut | sRGB 100% · DCI-P3 99% · Adobe RGB 98% (Better) | sRGB 100% · DCI-P3 98% · Adobe RGB 94% |
| Year | 2026 (Better) | 2025 |
Frequently Asked Questions
Which has better PPI: Apple Studio Display XDR 27" or LG UltraGear 45GX950A 45"?
The Apple Studio Display XDR 27" has 218 PPI compared to 125 PPI for the LG UltraGear 45GX950A 45".
Which has a closer optimal viewing distance?
The Apple Studio Display XDR 27" requires 40cm vs 70cm for the LG UltraGear 45GX950A 45" 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 LG UltraGear 45GX950A 45" 2025 · 125 PPI · 44.5" · 165 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 LG UltraGear 45GX950A 45" 2025 · 125 PPI · 44.5" · 165 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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