Asus ROG Swift PG42UQ 138Hz OLED monitor review

Monitors 31 Page 9 of 10 Published by

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Viewing Angle - Color Temperature Offset - Power Consumption

Viewing Angle & Color Temperature Offset

Monitors are often advertised as having a viewing angle of somewhere between 140 and 165 degrees. This means that you can still see what's on the display if you are looking at it at 70 to 83 degrees from the side. However, most of the time, you will be sitting roughly straight in front of the screen, which means that you are looking at 0 degrees to the center of the screen and, at most, 45 degrees to the sides. Compared to the advertised viewing angle, it is much more relevant that the display does not change brightness or color in the corners. Above, a 0% view angle, we look directly at the screen. Below, the viewing angle at sharper horizontally positioned camera angles. At an angle of almost 40 degrees here's where TN panels normally run into issues, IPS and VA are way better in this respect.  


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Photos absolutely blow to show the effect properly, when you look at brightness and discoloration alongside the viewing angle then that will tell you something about the image quality when you are not looking straight at the screen. TN screens would show discoloration to some degree whereas IPS and VA screens are less sensitive to that. Viewing angles for monitors are relative and a fairly subjective thing, as I assume, you'll be sitting directly in front of your monitor. Our overall subjective rating; very good. 

These images emphasize two points. OLED panels have greater off-axis image quality than LCD displays, although they are not flawless. A minor green shift can be seen at 45 degrees to the sides and from above. However, light output remains very constant, and detail remains consistent. We scarcely noticed anything when we moved off center in the material. Another thing visible here is more minor reflections. For the best image, placement should be carefully examined. Any bright light source, such as the sun or a lamp, will be detected. The light does not wash out the image, but the reflections do.


Color temp target 6500K

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We approach color precision in a simple understanding way, and to explain the method, this test is simple. We look at how close the screen is to a color temperature of 6500 Kelvin based on the default color space. This test is done at default monitor settings. The screen, however, has many presets you can choose from and some very specific RGB color control preferences. The sky is the limit. 


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Power consumption


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We measure power consumption measured in three ways. A white screen, a black screen, and then in standby/power-down mode. We measure at 100% brightness which is the maximum output and thus power consumption.

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Idle or sleep power consumption has improved over the years for most technology due to US and EU legislation at 0.1 Watts. Close but no cigar. After the PC is turned off, the power consumption sticks at 20 Watts then drops to 9 watts for about 15 minutes. We're not sure what it is, but we're certain that it's something that needs to be addressed. Please power off your monitor manually by pressing the off button under the monitor after which it will now draw any energy.


Dead pixel check

On inspection, we found no dead or stuck pixels.

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