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The PX275CP includes HDR10 support but must be switched manually between signal types. Though there is no additional contrast available for HDR content, it looks a bit more colorful thanks to some clever decisions on Pixio’s part.
HDR Brightness and Contrast
The PX275CP doesn’t put out any more light in HDR mode versus SDR. The other screens are superior in this regard. It also does nothing different to its black levels so contrast is only a tiny bit higher at 996.9:1.
You can see that the Monoprice and MSI screens also track the same dynamic range for HDR and SDR. But the Razer, Acer and Viotek monitors employ dynamic features to up the quality for HDR. The only benefit to using HDR with the Pixio is its slightly higher color saturation. I’ll show you that result below.
Grayscale, EOTF and Color
The PX275CP’s HDR grayscale runs a bit blue but isn’t too far off the mark. The error is most obvious around the tone map transition point at 60% brightness. There is no way to fix this issue as all picture controls are grayed out. EOTF luminance tracking is a bit dark in tone, which slightly improves perceived contrast. Shadow detail is very visible at the lowest levels because they are too light below 10% brightness.
The good part comes with the PX275CP’s HDR color tracking. Though it is not capable of rendering the entire DCI-P3 gamut, it hits the inner targets up to 80%. Since most content lives between 20 and 80% saturation, the HDR picture is a tad more colorful. This is a smart choice on Pixio’s part to make a standard gamut monitor look better in HDR mode without including a wide gamut option.
Christian Eberle is a Contributing Editor for Tom's Hardware US. He's a veteran reviewer of A/V equipment, specializing in monitors.
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