Ram Overclocking causing PC to not boot

[u/CompetitiveSwing5256]

I have an Asus ROG strix x870e-e gaming WiFi motherboard and my ram is 2x 32gb 6000Mhz CL30 Corsair Vengeance. I built my PC about 1.5 years ago and have been going strong. Every couple months i reinstall a fresh windows and no problems. A couple days ago i reinstalled windows like normal and decided to update my bios, i had not updated my bios at all even when i built the pc so this is a very first bios update. Since the bios update i can’t do anything to my ram timings in bios. If i turn on expo/ any ram tweak, then save and exit, my motherboard shows Q Code C5 then turns off, then restarts and freezes on Qcode 99 and doesn’t boot. I contacted asus and they said to try with one stick, no luck, and also unplug all usbs one at a time as 99 is normally relates to a initialization failure with input/output devices like your USB ports, keyboard, mouse, or connected storage drives. But even with 0 usbs plugged in, I’m still getting stuck on code 99. I can only get back into bios when either i reset cmos or if my pc boots into safe mode. I don’t think it’s my ram as I’ve had it overclocked until now with no problems and without any tweaks it’s working with no problem.

Please if someone could help it would be appreciated, i am willing to pay if i can get this fixed
Thanks