SDR Performance, Response Time, Input Lag

Let's talk color performance in the SDR mode. Here nosotros're limited to 300 nits of peak brightness and with the dynamic backlight enabled y'all'll get a contrast ratio around 14,600:1. At 200 nits, which we use for calibration, that's cut down to merely shy of 10,000:i, which is however outstanding for LCD technology. There are some situations where content creators may want to disable the backlight, in which case again you'll revert to a standard 1,000:1 contrast ratio, simply for nigh users every bit I said earlier, just go along information technology on.

Default Performance

Every PG27UQ comes factory calibrated to a deltaE of less than 3.0, which isn't the tightest standard, but in my testing of default performance, color accurateness was significantly better than dEs of just three.0. The monitor produced a greyscale deltaE average of just 1.43 with a color temperature average of 6419K and virtually-perfect gamma, which is a fantastic out of the box result.

Saturation results revealed a deltaE average of i.sixty with 99.9% sRGB coverage, while in ColorChecker, deltaEs were entirely under 3.0 with an average of one.58. All upwardly this is excellent factory operation from a monitor with operation near duplicate from truthful accuracy; the most strict users may want to calibrate it further to get deltaEs sub 1.0, but anything under 2.0 is basically accurate anyhow and then I probably wouldn't bother attempting to deal with often troublesome colour profiles but to get a very minor improvement.

Calibrated Performance

That said, I did calibrate the monitor fully using a combination of a colour profile and small-scale OSD tweaks, and achieved boilerplate deltaEs around 1.0 or lower with a tighter gamma and CCT curve. The hit to dissimilarity was basically irrelevant. Practice annotation that color profiles are ignored in Windows' HDR mode, but the good news is the factory SDR functioning is preserved when HDR and WCG is enabled, and Windows support for SDR tone mapping in the HDR way is improving with each update to the bespeak where leaving the setting enabled for desktop usage is a genuine option.

Panel uniformity was skillful without being great, the top left and lesser correct areas are slightly off compared to the remainder of the console in my review unit, but overall uniformity is a fleck improve than most gaming displays. However, it's not in the same ballpark as professional form monitors, so while Asus is providing very good color accuracy for professionals, at that place is still merit to purchasing a top-end pro monitor to get extreme uniformity.

For response time testing, I tested with the dynamic backlight enabled every bit I recommend most people leave it enabled for gaming. This actually improves response times past 1-2ms, to my surprise. I'd also recommend leaving the monitor on its default 'normal' overdrive setting, the extreme mode introduces overshoot, so my testing was done with the normal setting.

The PG27UQ uses IPS technology so naturally it volition sit between TN and VA in terms of response times. Asus quotes a grey-to-grey figure of 4ms and surprisingly, I reported a 4.18ms grey to grayness average which is very good for this sort of monitor. Fall times are slightly longer than rising times on boilerplate, only there were no crazily wearisome outliers. The black-white-black response of 9.56ms is also in line with Asus' quoted specs so no complaints here.

Input lag is slightly down on other monitors I've tested though not outrageous. In just the SDR fashion with the dynamic backlight and G-Sync enabled at 120 Hz, estimated lag is around 15ms which is similar to the Acer Predator X34. As I test more monitors we'll have a wider range of data to compare with our input lag testing methodology, and then stay tuned.

And a quick note on power consumption, the PG27UQ sucks down a huge 117 watts displaying a 200 nit all white image, which is well above other 27-inch monitors I've tested. A typical power consumption figure for this size should exist around 60W only with the backlight and G-Sync module, that's ballooned out significantly. Every bit for peak power consumption, this beast sucks downward 300W to display a full white image at one thousand nits.