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Response, Input Lag, Viewing Angles and Uniformity

To compare the MB27ACF’s performance, I’ve rounded up other 27-inch QHD screens, none of which are portable. As I said earlier, it’s something of a niche genre. Since the top speed is 100 Hz, response and input lag comparisons are a bit unfair, but the Asus acquits itself well. The other displays are AOC’s Q27G40XMN and Q27G4XY, Gigabyte’s M27QA ICE, Xiaomi G Pro 27i, and Asus’ XG27ACS.

Pixel Response and Input Lag

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Asus ZenScreen MB27ACF — (Image credit: Tom's Hardware)

A typical 60 Hz enterprise monitor takes 16ms to draw a full white field, so the MB27ACF is doing well to complete the task in 11ms at 100 Hz. Motion is reasonably smooth thanks to Asus’ excellent overdrive, which works best at 60%. There’s a bit of blur, but not as much as the term “100 Hz” would suggest.

Input lag is higher than the rest, but again, it’s not too bad if you’re up for casual gaming or you’re not too worried about frenetic competition in Doom Eternal’s Horde mode. I had a decent experience playing during the review. The MB27ACF is a gaming monitor, just not a super-high-performance one.

Test Takeaway: The MB27ACF delivers decent performance with low motion blur and reasonable input lag considering its relatively slow 100 Hz refresh rate. Given the quality of the overdrive, I’d bet this monitor would be substantially better at 144 Hz. However, it is more than quick enough for casual gaming on the road.

Viewing Angles

The MB27ACF is one of the better IPS panels I’ve photographed, with only a slight green tint seen in the 45-degree photo. Gamma and brightness remain solid, which means you’ll barely see a difference in actual content. The top view is a bit cool in tone with reduced gamma and light output which is typical of IPS panels. Overall, this is excellent performance.

Screen Uniformity

To learn how we measure screen uniformity, click here.

In the screen uniformity test, the MB27ACF just dips below the visible threshold with a 9.58% score. I couldn’t see any bleed or glow, but my meter found slightly elevated levels in the upper right corner of the screen, a minor flaw at best. I have no complaints here.

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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.