If you can't do 5200 stably then you've got a faulty mobo beyond that I confirmed it with Asus engineers 5200Mhz is the limit it may be that your non3D can't even do that but can confirm it works with the 7900x3D I wouldn't exactly rely on things lik...

I had similar issues identical board. I also have the same RAM at 7200MHz. The issue is your CPU the Ryzen 9 7900 series CPU can only handle 2x1R or 2x2R DDR5 at 5200MHz. Anything over will cause stability issues or failure to boot. In simple terms C...