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HDR Performance

To learn about our HDR testing, see our breakdown of how we test PC monitors.

The PX277P includes support for HDR10 signals, but as you’ll soon see, there is no benefit to using the HDR mode. To switch over, turn on HDR in the Gaming Setup menu, then apply the signal.

HDR Brightness & Contrast

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(Image credit: Tom's Hardware)

There is no extra brightness available for HDR signals. In fact, the PX277P’s HDR white level measures slightly lower than its SDR one. This isn’t necessarily a bad thing, but since the black level is also about the same as SDR, contrast is no different. That means HDR won’t have any additional impact on your experienced compared to an SDR-only monitor.

Grayscale, EOTF and Color

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(Image credit: Tom's Hardware)

The first chart shows the PX277P to have significant grayscale errors in HDR mode. We could see an obvious red tint in test patterns. The EOTF curve is properly rendered with a 60% tone-map transition point. The gamut tracking test versus DCI-P3 shows the monitor’s sRGB gamut. There are visible hue errors in the primary colors with over-saturation of the inner points and colors that fall short of the 100% marks. The red error makes for an unsatisfying HDR image. After initial tests and observations, we did not play games or watch videos in HDR mode.

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Christian Eberle is a Contributing Editor for Tom's Hardware US. He's a veteran reviewer of A/V equipment, specializing in monitors. Christian began his obsession with tech when he built his first PC in 1991, a 286 running DOS 3.0 at a blazing 12MHz. In 2006, he undertook training from the Imaging Science Foundation in video calibration and testing and thus started a passion for precise imaging that persists to this day. He is also a professional musician with a degree from the New England Conservatory as a classical bassoonist which he used to good effect as a performer with the West Point Army Band from 1987 to 2013. He enjoys watching movies and listening to high-end audio in his custom-built home theater and can be seen riding trails near his home on a race-ready ICE VTX recumbent trike. Christian enjoys the endless summer in Florida where he lives with his wife and Chihuahua and plays with orchestras around the state.