Acer Predator XB271HK 27″ 4K Monitor Review


Panel Uniformity / Panel Performance

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 would be equal throughout the entire panel. 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.

We must admit to being slightly disappointed by the XB271HK’s lack of uniformity. While a variation of 17% is not terrible, it certainly is not the best we have seen in this size range.

Panel Performance

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

Even though this monitor is ‘only’ capable of 60Hz the amount of blurring is actually quite minimal. So much so, that most consumers would be hard pressed to tell the difference between this 60Hz Acer Predator XB271HK and the 144Hz Acer Predator XB270HU. Put another way this monitor is rather impressive given the refresh limitations it has to work with. Obviously this ‘60Hz’ panel does have some untapped potential and it is the DisplayPort 1.2 standard that is holding it back from higher refresh rates.

Also noteworthy is unlike most of the Predator lineup the OverDrive feature of the XB271HK actually serves a useful purpose! When turned off this panel does exhibit noticeable pre-ghosting and ghosting. Worse still consumers need not be a pixel peeper to see it, instead to the naked eye the little race car and its driver seemed to stutter across the screen. By simply leaving the OverDrive setting in its default ‘normal’ position the pre-ghosting is eliminated at the car does become much clearer and crisper. Users will still see some ghosting from time to time, but not enough to be overly worrisome.

Sadly, increasing the OverDrive to its ‘extreme’ setting does nothing to increase image clarity and instead worsens it. Not only does image clarity degrade to the naked eye but so does color fidelity. As such, people can consider the ‘normal’ setting alongside G-SYNC to be as close to optimal as this monitor is capable of providing.

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