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To read about our monitor tests in-depth, please check out Display Testing Explained: How We Test PC Monitors. We cover brightness and contrast testing on page two.
Uncalibrated – Maximum Backlight Level
Xiaomi claims 350 nits for the G34WQi, and my sample topped 385. This is with DCR (dynamic contrast) turned off. Turning it on reduces the black level but also crushes shadow detail. With over 3,333:1 native contrast, no help is needed here. This is about triple the dynamic range of an IPS panel, a difference you can clearly see in content. The picture looks more lifelike with greater depth and color saturation. Among VA monitors, the G34WQi is just above average in this test.
After Calibration to 200 nits
Calibration makes very little difference in the G34WQi’s contrast. It’s about the same as before, but color is a tad more saturated thanks to the grayscale adjustments. More on that later. The Philips and ViewSonic have higher native contrast, but they also cost a lot more.
The G34WQi is the best of the rest in the ANSI test, with a ratio just under 3,000:1. This is very consistent performance that you wouldn’t expect for less than $300. Again, the Philips and ViewSonic take first and second place, but that should be the case, considering they cost far more.
Test Takeaway: The G34WQi uses its VA panel to produce class-leading contrast. Among budget screens, it is a clear winner. Only a pair of expensive Mini LED models can beat it; that is certainly significant. With 385 nits peak brightness available, there is more than enough light output for a punchy image. And the high contrast helps color look more saturated.
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