Acer Predator XB273K 4K 144Hz Monitor Review: The Next Best Thing

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HDR Performance

The XB273K carries VESA’s DisplayHDR 400 certification, which means it will surpass 400 nits peak brightness with HDR material. It does this easily and delivers excellent black levels and contrast while doing so.

HDR Brightness & Contrast

At just over 469 nits, there is plenty of headroom to ensure well-detailed HDR content with bright highlights and deep shadows. Effective contrast is an excellent 4,104.1:1, which puts the monitor in the company of good VA panels. It won’t hit the lofty numbers of the full-array backlight monitors, but that is something you have to sacrifice to save around $500 (£400).

Among rank-and-file HDR monitors, the XB273K is one of the best.

Grayscale, EOTF & Color

Since there are no adjustments available for HDR signals, it’s a good thing that Acer did its homework before tuning the XB273K. Grayscale tracking is essentially perfect with a tiny bit of visible blue tint at the 65 percent clip point. After that, whites are a bit warm, but this is a minor issue that won’t impact gaming or video enjoyment one bit.

Luminance tracking is also within a whisker of perfect, with just a slight soft-clip at around 60 percent brightness. This level of accuracy ensures maximum depth and contrast for HDR material.

When tracking the DCI-P3 gamut in HDR mode, the XB273K goes for a bit of extra saturation in all of the primary colors. While not perfectly accurate, it adds a nice bit of extra punch to games and video. The magenta is slightly off hue as well. Again, however, these are small errors and well within the reaches of acceptability.

We consider this display to be reference-level for HDR content.

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Christian Eberle
Contributing Editor

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.