Yep, it's ram I set it to run memtest 86 for a while, looked fine for a pass or two, left it running, came back on pass 7 and had 7000 errors all from test 5. This is from 1600mhz 8-8-8-24-88-1T with 1.65v. Need to get that RMA going, I'm not sure if I want another set of these sticks if they're just going to die - what's the best PSC's got out nowadays?