AOC U32G4 32-inch 4K Dual-Refresh gaming monitor review: Solid performance and value

AOC redefines the budget 4K gaming monitor with its U32G4.

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AOC U32G4
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For all tests except panel response, I’ll be comparing the U32G4 to a group of 27-inch 4K screens. My database doesn’t have any current 32-inchers except for BenQ’s PD3226G. The other displays are AOC’s U27G4XM, ViewSonic’s VX2730D-4K, Titan Army’s P2712V, and Gigabyte’s GS27U.

Pixel Response and Input Lag

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

The response test group consists of the last five LCD panels I’ve tested, so their sizes and resolutions vary. It’s interesting to note that refresh rate doesn’t always mean faster screen draw. That is a function of the overdrive. When I test, I set it to where there are no ghosting artifacts. This is usually not the fastest setting. In the U32G4’s case, doubling the refresh rate adds a scant 0.16ms to the score. This is an imperceptible amount. The overdrive is effective, but the first three panels will be a touch smoother at the indicated refresh rates. Remember that an OLED panel is about ten times quicker with draw times around 0.25ms.

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In the lag test, the U32G4 takes the win at 320 Hz with a 13.4ms score. This puts it on par with many premium gaming monitors. At 160 Hz, it manages to outdo three monitors with higher refresh rates. For the price, this kind of performance is hard to beat.

Test Takeaway: The U32G4 is one of the faster gaming monitors I’ve tested. It’s worth pairing with a video card powerful enough to run at 160 Hz at 4K resolution, as it offers excellent overdrive and very low input lag. To get smoother processing, you’ll need an OLED, which will cost you around three times as much. This is impressive performance to say the least.

Viewing Angles

AOC U32G4

(Image credit: Tom's Hardware)

The green tint seen in the U32G4’s 45-degree side photo shows its IPS origin. But it isn’t the most tint I’ve seen. And there is no change to gamma or brightness, which is a major plus. This is a very shareable monitor. The top view has a red cast with reduced gamma and luminance.

Screen Uniformity

To learn how we measure screen uniformity, click here.

AOC U32G4

(Image credit: Tom's Hardware)

I noticed a Uniformity picture mode, which indeed improves uniformity but at the cost of peak brightness and contrast. No matter, because my U32G4 sample scored an excellent 6.58% in its Standard mode. There are no visible issues here in any test pattern or content. This is excellent performance.

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Christian Eberle
Christian Eberle
Contributing Editor

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.