Got the gigabyte 965p S3 mobo and once in a while it will reboot, usually when playing video and last time when copying a vid file from one hdd to another. Just changed the psu because my next to last suspicion was I was a little short on power. If it happens again, it only leaves the mobo. I'm running an e4400 at 300 X 10 and its very stable with orthos and memtest so the mobo will be the last possibility for me. I've heard the Biostar mobo is supposed to be good and wanted some other options. Thanks.