LG UltraFine 40U990A-W vs MSI MPG 272URX QD-OLED
Side-by-side comparison of viewing distance, PPI, and specifications
MSI MPG 272URX QD-OLED
26.5" · 3840×2160 · QD-OLED
Optimal Viewing Distance 53cm
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Category Ranking
Pixel Density (PPI)67in category
LG UltraFine 40U990A-W140 PPI #30
MSI MPG 272URX QD-OLED166 PPI #16
93 PPI224 PPI
HDR Peak Brightness67in category
LG UltraFine 40U990A-W600 nits #22
MSI MPG 272URX QD-OLED1000 nits #7
250 nits2000 nits
DCI-P3 Color Gamut63in category
LG UltraFine 40U990A-W99% #2
MSI MPG 272URX QD-OLED99% #2
79%100%
Refresh Rate
LG UltraFine 40U990A-W120 Hz
MSI MPG 272URX QD-OLED240 Hz
StandardHighUltra
Summary
- Sharpness: no visible difference — Both screens exceed the retina threshold at 65cm. The MSI MPG 272URX QD-OLED has 16% higher pixel density (166 vs 140 PPI), but this only becomes visible below 53cm.
- Brightness: advantage LG UltraFine 40U990A-W — The LG UltraFine 40U990A-W is 80% brighter in SDR (450 vs 250 nits), a noticeable difference for outdoor readability. HDR peak: 600 vs 1000 nits.
Key Differences
| Specification | LG UltraFine 40U990A-W | MSI MPG 272URX QD-OLED |
|---|---|---|
| Screen Size | 39.7" | 26.5" |
| Resolution | 5120×2160 | 3840×2160 |
| SDR Brightness | 450 nits | 250 nits |
| Color Gamut | sRGB 100% · DCI-P3 99% | sRGB 100% · DCI-P3 99% · Adobe RGB 97% |
| Pixel Density (PPI) | 140 | 166 |
| Optimal Viewing Distance | 62cm | 53cm |
| Refresh Rate | 120 Hz | 240 Hz |
| Response Time | 5 ms GTG | 0.0 ms GTG |
| HDR Peak Brightness | 600 nits | 1000 nits |
| Contrast Ratio | 1:2,000 | 1:1,500,000 |
All specifications
| Specification | LG UltraFine 40U990A-W 2025 | MSI MPG 272URX QD-OLED 2025 |
|---|---|---|
| Screen Size | 39.7" (Better) | 26.5" |
| Resolution | 5120×2160 (Better) | 3840×2160 |
| Pixel Density (PPI) | 140 | 166 (Better) |
| Optimal Viewing Distance | 62cm | 53cm (Better) |
| Panel Type | IPS | QD-OLED |
| Viewing Angle | 178° | 178° |
| Aspect Ratio | 21:9 | 16:9 |
| Refresh Rate | 120 Hz | 240 Hz (Better) |
| Variable Refresh Rate (VRR) | FreeSync Premium | G-SYNC Compatible |
| Response Time | 5 ms GTG | 0.0 ms GTG (Better) |
| HDR Certification | DisplayHDR 600 | DisplayHDR True Black 400 |
| SDR Brightness | 450 nits (Better) | 250 nits |
| HDR Peak Brightness | 600 nits | 1000 nits (Better) |
| Contrast Ratio | 1:2,000 | 1:1,500,000 (Better) |
| Ports | 2x HDMI · 1x DP · USB-C · USB Hub | 2x HDMI · 1x DP · USB-C · USB Hub |
| USB-C Power Delivery | — | 98 W |
| Color Gamut | sRGB 100% · DCI-P3 99% (Better) | sRGB 100% · DCI-P3 99% · Adobe RGB 97% |
| Year | 2025 | 2025 |
Frequently Asked Questions
Which has better PPI: LG UltraFine 40U990A-W or MSI MPG 272URX QD-OLED?
The MSI MPG 272URX QD-OLED has 166 PPI compared to 140 PPI for the LG UltraFine 40U990A-W.
Which has a closer optimal viewing distance?
The MSI MPG 272URX QD-OLED requires 53cm vs 62cm for the LG UltraFine 40U990A-W to reach retina quality.
Related Comparisons
Alienware AW2725DF 27" 2024 · 110 PPI · 26.7" · 360 Hz
vs LG UltraFine 40U990A-W 2025 · 140 PPI · 39.7" · 120 Hz
Alienware AW2725DF 27" 2024 · 110 PPI · 26.7" · 360 Hz
vs MSI MPG 272URX QD-OLED 2025 · 166 PPI · 26.5" · 240 Hz
Alienware AW3225QF 32" 2024 · 139 PPI · 31.6" · 240 Hz
vs LG UltraFine 40U990A-W 2025 · 140 PPI · 39.7" · 120 Hz
Alienware AW3225QF 32" 2024 · 139 PPI · 31.6" · 240 Hz
vs MSI MPG 272URX QD-OLED 2025 · 166 PPI · 26.5" · 240 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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