ASUS ROG Swift PG42UQ 42" vs LG 27GP850-B 27"
Side-by-side comparison of viewing distance, PPI, and specifications
ASUS ROG Swift PG42UQ 42"
41.5" · 3840×2160 · OLED
Optimal Viewing Distance 82cm
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Category Ranking
Pixel Density (PPI)67in category
ASUS ROG Swift PG42UQ 42"106 PPI #64
LG 27GP850-B 27"109 PPI #55
93 PPI224 PPI
HDR Peak Brightness67in category
ASUS ROG Swift PG42UQ 42"1000 nits #7
LG 27GP850-B 27"400 nits #51
250 nits2000 nits
DCI-P3 Color Gamut63in category
ASUS ROG Swift PG42UQ 42"98% #31
LG 27GP850-B 27"98% #31
79%100%
Refresh Rate
ASUS ROG Swift PG42UQ 42"138 Hz
LG 27GP850-B 27"165 Hz
StandardHighUltra
Summary
- Sharpness: advantage LG 27GP850-B 27" — Neither screen reaches retina quality at 65cm. The LG 27GP850-B 27" gets there at 80cm vs 82cm for the ASUS ROG Swift PG42UQ 42".
- Brightness: advantage ASUS ROG Swift PG42UQ 42" — Similar SDR brightness (450 vs 400 nits), but the ASUS ROG Swift PG42UQ 42" leads in HDR peak (1000 vs 400 nits).
Key Differences
| Specification | ASUS ROG Swift PG42UQ 42" | LG 27GP850-B 27" |
|---|---|---|
| Screen Size | 41.5" | 27" |
| Resolution | 3840×2160 | 2560×1440 |
| Response Time | 0.1 ms GTG | 1 ms GTG |
| SDR Brightness | 450 nits | 400 nits |
| HDR Peak Brightness | 1000 nits | 400 nits |
| Contrast Ratio | 1:1,000,000 | 1:1,000 |
| Year | 2022 | 2021 |
| Pixel Density (PPI) | 106 | 109 |
| Optimal Viewing Distance | 82cm | 80cm |
| Refresh Rate | 138 Hz | 165 Hz |
| Color Gamut | sRGB 133% · DCI-P3 98% · Adobe RGB 94% | sRGB 135% · DCI-P3 98% · Adobe RGB 93% |
All specifications
| Specification | ASUS ROG Swift PG42UQ 42" 2022 | LG 27GP850-B 27" 2021 |
|---|---|---|
| Screen Size | 41.5" (Better) | 27" |
| Resolution | 3840×2160 (Better) | 2560×1440 |
| Pixel Density (PPI) | 106 | 109 (Better) |
| Optimal Viewing Distance | 82cm | 80cm (Better) |
| Panel Type | OLED | IPS |
| Viewing Angle | 178° | 178° |
| Aspect Ratio | 16:9 | 16:9 |
| Refresh Rate | 138 Hz | 165 Hz (Better) |
| Variable Refresh Rate (VRR) | G-SYNC Compatible | FreeSync Premium |
| Response Time | 0.1 ms GTG (Better) | 1 ms GTG |
| HDR Certification | None | DisplayHDR 400 |
| SDR Brightness | 450 nits (Better) | 400 nits |
| HDR Peak Brightness | 1000 nits (Better) | 400 nits |
| Contrast Ratio | 1:1,000,000 (Better) | 1:1,000 |
| Ports | 4x HDMI · 1x DP · USB Hub | 2x HDMI · 1x DP · USB Hub |
| Color Gamut | sRGB 133% · DCI-P3 98% · Adobe RGB 94% | sRGB 135% · DCI-P3 98% · Adobe RGB 93% (Better) |
| Year | 2022 (Better) | 2021 |
Frequently Asked Questions
Which has better PPI: ASUS ROG Swift PG42UQ 42" or LG 27GP850-B 27"?
The LG 27GP850-B 27" has 109 PPI compared to 106 PPI for the ASUS ROG Swift PG42UQ 42".
Which has a closer optimal viewing distance?
The LG 27GP850-B 27" requires 80cm vs 82cm for the ASUS ROG Swift PG42UQ 42" to reach retina quality.
Related Comparisons
Alienware AW2725DF 27" 2024 · 110 PPI · 26.7" · 360 Hz
vs ASUS ROG Swift PG42UQ 42" 2022 · 106 PPI · 41.5" · 138 Hz
Alienware AW2725DF 27" 2024 · 110 PPI · 26.7" · 360 Hz
vs LG 27GP850-B 27" 2021 · 109 PPI · 27" · 165 Hz
Alienware AW3225QF 32" 2024 · 139 PPI · 31.6" · 240 Hz
vs ASUS ROG Swift PG42UQ 42" 2022 · 106 PPI · 41.5" · 138 Hz
Alienware AW3225QF 32" 2024 · 139 PPI · 31.6" · 240 Hz
vs LG 27GP850-B 27" 2021 · 109 PPI · 27" · 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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