Bad motherboard. Thats a good 2 years old and a terrible chipset. Trust me, my motherboard has the smae one.
Heres a good build for the kind of budget your looking at and don't change anything!
EDIT: Unfortunately, for some odd reason newegg is refusing to come up on this computer...
****, even the entire lab...
Anyways,
Get Intel q6600
Asus Maximus 2
4gb of ddr2-800 ocz/corsair memory
2x Ati 4870's
750 watt corsair power supply
Gigabyte Aurora, Cooler Master Stacker, Thermaltake Armor case. Whatever you like.
2x 640gb western digital SATA hard disk drives
whatever DVD burner you want, SATA is best.
And then drop the money you saved on a nice 24 or 28" lcd.