It may also be possible that the weight of the cooler might deform the board enough that the ram sockets lose contact with the ram chips. Either way, since I made a support for the cooler everything has been good here. I will report back if I lose any of the ram again. I don't think I have any...
I just had the same thing happen. 12 gb on board. Everything was ok for about a month then windows and boot screen only showed 8gb but CPUID shows 12gb. It turns out that the CPU cooler (Noctua u12 push-pull) was heavy enough to possibly cause the CPU to lose contact with some of the pins? I...