I ran into a strange problem where after only changing the cooler from a Noctua NH-D15 to a EK-AIO 360. I'm unable to run my memory at XMP settings, it ran fine on XMP fine before for 2 weeks, no other hardware changes besides that. CPU is 12900K, Motherboard is a ROG STRIX Z690-E GAMING WIFI, Ram Corsair Vengeance 64 GB (2 x 32 GB) DDR5-5200 CL40 Memory (CMK64GX5M2B5200C40).
Is the motherboard somehow managing voltages differently now that it has detected a cooler on the AIO pump header? Or did I have bad luck and the memory just decided to crap out during the CPU cooler change? I have tried upping the voltage from the default 1.25v to 1.30v no luck I'm only able to run DDR5-4000. I've read that higher memory capacities put more strain on the memory controller.
---Solved CPU cooler mounting pressure was the culprit. Backed out the screws a bit and ram stability returned, able to run XMP again.
After racking my brain I knew it had to be related what I did. Only thing I touched was the CPU so that was the most likely culprit. Occam's razor the simplest explanation is usually the right answer.