To read about our monitor tests in-depth, check out Display Testing Explained: How We Test Monitors and TVs. We cover brightness and contrast on page two.
Uncalibrated – Maximum Backlight Level
All the monitors in the CU34G2X comparison group support HDR with edge backlights and max brightness that ranges from 350 to over 500 nits. Panels are a mix of VA (AOC Agon AG493UCX, Aorus CV27Q, Dell S3220DGF) and IPS (Aorus FI27Q, BenQ EW3280U).
Our CU34G2X sample came up short of its claimed 300 nit output level, topping out at 232 nits. This is bright enough for SDR content though you won’t want to use this monitor in a super bright environment. Luckily, it produced good black levels that are on par with the better VA panels here. Resulting contrast is 2,394:1 with default settings in place. This is solid performance but not the best among our comparison group.
After Calibration to 200 nits
Our calibration (see our recommended settings) consisted only of lowering the brightness setting to 200 nits. We didn’t make any other changes because we couldn’t improve upon the CU34G2X’s color accuracy in the User Color Temp mode. Regardless, black levels were quite good, and contrast was a tick higher at 2,428.3:1.
With excellent screen uniformity available, the CU34G2X also posted a solid ANSI contrast score of 2,257.7:1. You can see from all our test results that VA is by far the best panel tech for native dynamic range. Until you get into monitors with full-array local dimming backlights, which you’ll find in the best HDR monitors, this is the best way to get deep blacks on a budget.
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