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With so much attention focused on OLEDs, I had to go back in time to find a group of QHD LCDs worthy of comparison to the Q27G4ZMN. They are AOC’s CQ27G4ZH, Titan Army’s P32A2S2, Gigabyte’s GS27QXA, ViewSonic’s XG2736-2K, and the Xiaomi G Pro 27i. Speeds range from 180 to 300 Hz.
Pixel Response and Input Lag
It’s interesting to see the variance of panel response times and how they don’t stay in lockstep with refresh rates. OLEDs are a bit more consistent. The Q27G4ZMN draws a full white field in 5ms which is quick enough to eliminate most motion blur before the overdrive kicks in. With that engaged, there is virtually no blur, and no artifacts either. The other AOC and the Titan Army are a tad quicker, but the visual difference is minute.
The spread of input lag scores is tight as well. And clearly, refresh rate doesn’t guarantee success. The quickest screen is the 240 Hz ViewSonic, followed closely by the Q27G4ZMN. The other AOC runs at 300 Hz but is no faster. You’ll see no real difference between any of the six monitors in terms of gaming feel and responsiveness. The Q27G4ZMN runs with the best and stands out in other areas that I’ll show you later.
Test Takeaway: The Q27G4ZMN is one of the quickest Mini LED monitors you can buy. It also has an excellent overdrive which runs smoothly and is artifact-free. It’s also one of the least expensive screens in the group so the bang-for-the-buck quotient is extremely attractive.
Viewing Angles
A VA panel’s main weakness is off-axis image quality and the Q27G4ZMN breaks no new ground there. At 45 degrees, you can see a green shift with slightly darker gamma, but peak output remains constant. The top view is around 50% dimmer with very low gamma and a blue shift. This is typical VA panel performance.
Screen Uniformity
To learn how we measure screen uniformity, click here.
The Q27G4ZMN’s screen uniformity is about average for its price and technology. The score is 11.25%, which indicates a slight anomaly in the upper right and left corners of my sample. It’s easier to spot in a full black field pattern than in actual content.
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