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Acer Predator XB321HK 32″ 4K G-SYNC Monitor Review


Calibrated Settings

Please remember that the settings below have been calibrated for our specific environment and your viewing conditions may differ from ours.

Mode Used: “User Mode”
– All tests done at default settings at 120 cd/m2.
– Unless otherwise noted, the tests were carried out via DisplayPort

Panel Uniformity

In a perfect world, a screen’s brightness output should be equal throughout the entire panel. Regrettably, this is not a perfect world, but the lower the variation the less chances you will notice overly bright or dark sections on the screen. For the consumer LCD marketplace, a variance of 10% is our gold standard, but anything below 15% can be considered excellent as we doubt anyone will notice a -7.5 to +7.5 variation. A variation above 15% – but below 24% – can be considered adequate, but anything above this does not meet our basic minimum standards.

For such a large monitor, a panel brightness variance of 16% is fairly decent, it’s not great but not it’s terrible either. On the positive side, while this certainly is not the most uniform large monitor we have ever seen, it is actually a tiny bit better than the smaller XB271HK, which has a variation of 17%.

Panel Performance

Ideally, a screen’s real world response rate would be so fast that motion blur, ‘ghosting’, ‘reverse-ghosting’ would be a thing of the past. No matter how fast the action displayed all images would be represented in pristine condition similar in quality to a static image. This is not a perfect world, but the less amount of blurring that occurs, the less chances you will notice the issue in real world scenarios. While the panel’s response rate (ms) and frame rate (Hz) can give a fairly rough idea of how much blurring to expect, it is not the be-all and end-all.

To this end, we have taken PRAD’s Pixel Persistence Analyzer ‘Streaky Pictures’ program and – using a high speed camera – captured exactly how much and what kind of motion blur you can expect from a given monitor.

Acer is really hitting it out of the park lately, and 60Hz or not, the amount of blurring is very good bordering on excellent. Obviously, this panel does not ‘need’ 120Hz or 144Hz to provide (near) crystal clear images. This was somewhat expected as this is exactly what we said about the XB271HK as well. Having said that, Acer has left a lot of potential unrealized as we are quite positive the panel could do more than just 60Hz. It is really a shame that they did not push the boundaries and were not forward thinking enough when they made this model, as DP 1.3 capabilities would have made this one hell of a contender now and in the future.

Interestingly enough, unlike the XB271HK, this monitor really should not have OverDrive enabled. Even at the default ‘Normal’ setting there is some pre-Ghosting happening, and this ghosting not only gets worse when the panel is set to ‘Extreme’ but color fidelity also suffers. Needless to say you will have to be a pixel peeper to notice it – as these pixels are tiny and they are hard to see with the naked eye – but as with most of the Acer Predator lineup we would strongly advise turning off OverDrive and relying solely on G-Sync to provide as clear an image as this monitor is capable of producing.

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