Color Accuracy and Gamma
Color space and screen uniformity
We start our tests by measuring color space and screen uniformity. Uncalibrated performance means the out-of-the-box settings a monitor ships with. Calibrated performance is what results after the monitor has been put through our DataColor Spyder calibration process. Our aim with calibration is to be at a Gamma of 2.2 with a target 6500k color temperature and a 90cd/m2 brightness. Luminance is candela per square meter (cd/m2) also described as 'nits'.
The Asus RoG Swift PG27UQ has is a truly proper HDR panel and meets the requirement of a larger color space. By default, however, the screen is in sRGB (Racing) mode. If you want a wider color range, you will have to activate it yourself in the OSD menu.
Most software, however, can not deal with a wide gamut range, which makes colors appear very saturated. We measured the screen in both modes for color space testing, and show where relevant of both results.
For our first baseline test in the default gamut (sRGB) mode, we reach 99% of the sRGB color gamut, which is really good. But as explained, we can enable a wide color range in the monitor, so we do that and measure again.
In wide color gamut mode we reach 100% of sRGB, however, you can see we're much wider than that, that's easily 125% of sRGB.
So once we measure wide color gamut and test/compare with an AdobeRGB gamut, we retreive a 98% of AdobeRGB (!). To get you an idea, the AdobeRGB color space is very comparable to a DCI-P3 gamut, the green point is slightly different, the reds even better - but the measurement results show that the covered color space is hugely larger than sRGB. Very nice, very impressive.
Gamma
These monitors come factory calibrated for you, the next tests will back that fact. The average gamma value is also good with a measured deviation of 0.01 from 2.2
Gamma uncalibrated was spot on at 2.2, there is an allowance deviation of 10%, that is near perfect. This is the monitor untouched out of the box. And of course, you can alter and tweak anything to your liking yourself.
For a factory-calibrated monitor, the color accuracy should be really good out of the box, with a 0.00 average delta that is just a perfect score. That's a scary a one-off we assume.
