The Samsung Odyssey G7 has an outstanding refresh rate. It has native FreeSync VRR support and it’s certified by NVIDIA to be G-SYNC compatible. G-SYNC only works over a DisplayPort connection and the refresh rate over HDMI is limited to 144Hz.
We received reports that the backlight flickers with VRR enabled. 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 dims a bit. It did the same thing without VRR enabled, and when the image was at any other size than 100% scaling, the brightness went back up. We tested this in SDR, HDR, and with different games, but despite actively trying, we weren’t able to reproduce the issue. This appears to vary between units, as there are multiple other confirmations of units that don’t flicker, but your results could vary.