Like all Asus monitors, the PG27AQDM ships in the Racing mode. In this case, it’s a great choice for picture quality and accuracy and does not need to be adjusted further. As you’ll see, there is almost no gain from calibration.
Grayscale and Gamma Tracking
Our grayscale and gamma tests use Calman calibration software from Portrait Displays. We describe our grayscale and gamma tests in detail here.
The default grayscale run shows no visible errors with all values under 2dE. Gamma is a little light, with a dip at 90%, but the dynamic range is so wide you can’t see an issue in actual content. Calibration only makes a difference in the error value. Visually, the two images are the same. Gamma barely changes too. This is excellent performance.
If you want sRGB color, you can pick the sRGB gamut in Racing mode or set the picture mode (GameVisual) to sRGB. The latter delivers better color. Choosing the former option makes the grayscale quite cool. My only gripe is that you can’t automatically switch gamuts between SDR and HDR like other Asus ROG monitors.
Comparisons
The PG27AQDM starts with a second-place finish in the default grayscale error test. 1.41dE is one of the best scores I’ve recorded, but the Aorus does even better. This is a minor point. Visually, the top four monitors are the same. After calibration, all six monitors have very low error levels.
The PG27AQDM’s gamma tracks straight, as evidenced by its 0.17 range of values. But the average is a tad light at 3.18% deviation, actual value, 2.13. This error is almost impossible to spot in an OLED panel because of its tremendous contrast.
Color Gamut Accuracy
Our color gamut and volume testing use Portrait Displays’ Calman software. For details on our color gamut testing and volume calculations, click here.
The PG27AQDM aced my color gamut tests for both DCI-P3 and sRGB. The default is DCI-P3; most users will likely use that for all content. The effect of calibration is negligible. Notice that the green primary is almost completely covered, a rarity in wide gamut screens. Red is a touch under-saturated at 80 and 100% but only slightly.
The sRGB test goes by with flying colors. Not only is the error of 1.33dE incredibly low, but the gamut is completely covered. The white point and gamma are near-perfect as well. It doesn’t get much better than that.
Comparisons
The PG27AQDM’s color performance is superb, like all the OLEDs in this comparison. The AOC is only slightly behind in accuracy, though visually, the difference is minute. OLED also has consistently large gamut volumes, with the lowest performer still topping 93% of DCI-P3. In this group, the AOC’s Mini LED with its Quantum Dot layer takes the crown with a good bit of extra punch in the primary colors. But the OLEDs aren’t far behind, with the Asus holding its own. It also covers the largest volume in the sRGB test. The PG27AQDM is well-qualified for color-critical work and can be used in a professional setting.
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