So I built the budget gaming box Tom suggested a short while back:
Gigabyte EP45 Ud3R rev1.1
C2D E5300 2x2G OCZ PC8500
Sapphire 4870 XP Pro SP3
and it works great. That is till I leave utorrent running overnight in which case sometimes I'll awake at 4am to the sound of the fan running full blast, the leds on the keyboard and mouse out and the monitor asleep. Nothing responds. Only way out is to hold down power till it shuts off. When it comes back on, cpu temps are normal (37/30) and windows says there's been an error, prob a driver. Running latest 9.4 Catalyst driver for the video card. My intuition from reading a bunch of forums is that the ram is not playing nice, but I only know enough to get into trouble changing settings. Any help is much appreciated.