Acer Predator XB271HK 27″ 4K Monitor Review


Viewing Angles

Unlike CRT displays, the manner in which LCD panels create an image can result in one large weakness: the image can lose contrast when viewed off angle. While we do not recommend watching an LCD at anything besides perfectly straight on, the reality is this cannot always be done.

To help give you a glimpse of what a panel will look like when seen from either above the horizontal or vertical plane we have taken pictures at fairly extreme angles.

Thanks to its straight and not curved IPS based panel the viewing angles of this monitor are bloody impressive. Some of this is due to the fact that IPS simply has amazingly wide viewing angles, but some of it is because the dot-pitch is so extreme. The latter allows this monitor keep contrast and color fidelity longer than most IPS displays of similar size. Needless to say, when compared to the rest of the Predator models we have looked at, the XB271HK is the pick of the litter in this respect.

Maximum Contrast Ratio

While manufactures love to throw around “maximum” contrast ratios in the millions, the fact of the matter is that to get these high numbers they have to use “dynamic contrast” which—at best—results in overly optimistic specs. With DC turned off, the number of shades between purest white and blackest black a given monitor can display is usually in the low hundreds rather than the thousands.

The higher the contrast ratio, the better the monitor will display shades of dark and light. For IPS monitors, anything below 450:1 is unacceptable, with 500:1 or above considered optimal. For TN anything above 120:1 will be considered “good enough” for most consumers.

This monitor’s contrast ability is easily the best we have seen from any Acer Predator model to date, and that is indeed saying something.

Power Consumption

To obtain the maximum number we set the monitors brightness to 100% and the contrast to 100%. The Calibrated results are taken at 120 cd/m2 with the contrast set to the default level.

The reason the calibrated power consumption is higher than expected is two-fold. Firstly this is a 4K display and that does require more robust internal processing power. This however only accounts for a minor portion of the increased power consumption. The real reason power levels are higher than even the X34 is because consumers will have to leave the brightness setting at 43% to achieve optimal results. In either case, the XB271HK may not be a power hog, but certainly is no power miser like most 27-inch W-LED backlit monitors.

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