Games keep crashing yet the rest of my system is fine

i recently installed new ram and a 2 sata hdd's everything in the system runs fine exept for games i have rebuilt the system and the problems continues error tests for the memory and hdd's have shown no errors and the are no hardwhere conflicts do i need sp1 or 2 for sata to wrok properly?
 
You probably never updated your powersupply as well. Unless that has around 430Watt or more, it may not be strong enough to handle the extra memory and SATA-disks.
Fill in your "User Profile", top left on any page, so we can see what your rig looks like.
 
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