We displayed a test photo that reportedly causes this flicker with VRR enabled, and when the image was displayed full-screen, the brightness of the screen dimmed a bit.
We received reports that the backlight flickers with VRR enabled. G-SYNC only works over a DisplayPort connection. The Samsung Odyssey G7 has native FreeSync VRR support, and it's certified by NVIDIA to be G-SYNC compatible.
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This only happened to us after firmware update 1009.3 when Samsung added the VRR Control setting let us know if you experience the same issue.
Update : Unfortunately, VRR doesn't appear to be functioning correctly with the refresh rate set to 60Hz. As all of these tests are consistent, we're confident in our measurements. With 'Black Equalizer' at 10, we measured a contrast ratio of 3922:1, at '13' it was 3935:1, and at '20' it was 3892:1, so it's not much different from our original numbers. We also tried adjusting different settings to see if that made a difference. We did it with different equipment and even with a different way to measure contrast, but we obtained very similar results. Since the contrast measurements are quite a bit higher than Samsung's specifications for this display, we remeasured the contrast ratio. Note that this contrast ratio is much higher than Samsung's advertised 2500:1 contrast, and there appears to be significant variance in contrast between units. It has a local dimming feature, but it doesn't improve the contrast ratio because the checkerboard test pattern keeps all the dimming zones on. The Samsung Odyssey G7 has a great contrast ratio, so it displays deep blacks, which is normal from a VA panel.