amd processor are known to get hotter than intel chips. heat can cause these problems as well as voltage glitches. My first recommendation is to purchase an aftermarket heatsink and fan. (Foxconn makes good products). Add 1 or 2 case fans on the back. If that doesnt work, try a RaidMax p/s, Future power, or Antec, all are quality units. also, new asus boards are crappy, i would replace it with a gigabyte or biostar board.
I had the same problem, but it was purley random. the UPS fixed it.
