check your mb to see that you have all the bios patches. with the newer 6x and 7x chipset there been cpu code updates and updates for ram on a lot of mb bios. check that the ram you have been on the mb qal list. also use cpu-z and see what the mb set the ram speed up as and the voltage and timing. there a spd tab that the info tab that tells a uses and mb the rated speed the ram can run at. also use hardware monitor and watch your ps and system temps. hopfully under load your ps not dumping a lot of ac ripple into the system.