So i stupidly bought a G9 and i gotta say im not impressed at all.. at any refresh rate with gsync on or off no matter if i use the supplyed cable or the 8k DP cable i bought i get pixel walk to the point the screen FLICKERS so bad its almost epileptic inducing (as someone with epilepsy its not plesent to look at or see) im not sure why samsung have not addressed this issue yet.. there is THOUSANDS of posts on redit with the issue and its a shame to have such a flaw to ruin a product, if the flashing of the screen causes seizures for people with Epilepsy you lot will be looking at a hefty lawsuit so please address the **bleep** issue its been to long now.
im on the latest 1013.0 firmware running on a RTX 3090
here is an example gif that triggers the flashing/flickering on the G9
also please patch the firmware to cause the screen to boot/wake up when you have dual monitor set up and turn on your system the screen does not wake up with the pc unless you phyiscally wake the screen by pressing the menu button.
The RTX 3090 is the best and optimized GPU on the market. There should not be such issues with it. Have you checked the firmware? Moreover, check the wires are properly connected.
If everything is in order then contact Samsung customer support.