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Response, Input Lag, Viewing Angles and Uniformity

To compare the AG274QG, I’ve mined my database for three more 240 Hz QHD screens – Gigabyte’s M27QX, AOC’s PD27 and Asus’ PG279QM. To see how 165 Hz QHD screens stack up, I’ve included the HyperX Armada 27 and Cooler Master’s GM27-FQS.

Pixel Response and Input Lag

Click here to read up on our pixel response and input lag testing procedures.

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AOC Agon Pro AG274QG — (Image credit: Tom's Hardware)

A 1 ms difference in response time translates to a visible improvement. A 240 Hz monitor is clearer and quicker than a 165 Hz one. While 2 ms may not seem like much, but it truly is better at higher frame rates. Of course, running over 200f ps in QHD resolution will require a decent video card.

Overall input lag scores are visually closer between the six displays. The AG274QG is one of the quickest monitors I’ve tested, eclipsed only by the PD27 by just 1 ms. I was impressed to see this result with the overdrive turned off. Since any of its options result in ghosting, I don’t recommend using it. But it’s not needed because all the motion patterns I viewed were crystal clear, making it a seriously smooth gaming monitor.

Viewing Angles

The green color shift seen above is typical of IPS panels, but the AG274QG retains brightness at 45 degrees off-center better than most screens. The gamma is unchanged, which means detail won’t be harder to see if you’re not sitting on-center. The top view is quite blue, with some image washout observed.

Screen Uniformity

To learn how we measure screen uniformity, click here.

The AG274QG’s screen uniformity is generally good except for a slight hotspot I saw in my sample’s lower right corner. It wasn’t an issue in actual content, nor could I see it in brighter field patterns. Color uniformity was visually perfect, with no variation in hue.

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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.

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