Hello! I have a problem with getting random artifacts on desktop with stock clock settings and it seems unstable under load, it freezed once yesterday while gaming for about 2 hours under 50-60% load, also flickering ingame here and there, but not much. I had CCC 13.1 installed. I did fresh windows install and same thing happening (13.1). Is it possible gpu is too big of a deal for my PSU (550w, two 12V rails that go on gpu have only 25A combined), but then again im getting artifacts in desktop on occasions with no load on gpu. Temperatures are normal. Also memtestCL showing me random block errors, altho with 13.1 I got artifacts on desktop in middle of test, but didnt get any after I tested with 13.2 beta. Anyways, is my PSU causing problems, BIOS maybe (tried both and its same) or maybe drivers? My pc spec: i5 3570k at 4.2Ghz Gigabyte z77x-ud5h Corsair 8GB 1600mhz Sapphire HD7970 DualX Kingston SSD 128GB WD 250GB 7200rpm LCPOWER 550W V2.2 with rails rating 12V1x10A and 12V2x15A Windows 7 64bit Cheers ps. If its any help i'm using two LCD monitors both 60Hz one over dual link DVI at 1920x1080 and secondary over HDMI->DVI adapter at 1280x1024.