Question about Sapphire Nitro+ Radeon RX 7900 XTX Vapor-X

Has anyone experienced this problem? I surf normally in Mozilla or Chrome, even write something on Word or tinker with Excel and then lag or jerk briefly for 1-2 seconds and then it's smooth again. And this happens several times every 5 to 15 minutes... But you are reading this sentence correctly, this lagg or stuttering NEVER occurs during gaming, so the stuttering occurs when idle, but not under load !!! I changed the graphics card from 7900xtx to 5700xt and the problem never seems to occur, when I changed back to the 7900xtx the problem reappeared ... I did a DDU under safe mode etc, no help :( Does anyone have any ideas what else I can try? I once deactivated ResizeBAR, I also deactivated Smart Access Memory... I also set the energy settings to maximum performance and that didn't help either :( I'm at a loss at the moment ... I first thought the mainboard was causing the problem, but after I changed the graphics card to 5700xt and solved the problem, I don't think it could be the MB. Any ideas?