I built a pc about 6 or 7 months ago. It worked just fine but after a few months it would run hot and shut off durring game play (call of duty 2). I changed out the power supply thing it was that and i had suffcient fans so i couldnt figure out what it was. I noticed my heatsink was awfully hot so i bought a new and better one and that took care of the problem for like a week. Now my comp shuts off when im doing something menial like surfing the net or burning cd's. My heatsink is ver hot too the touch. I have BIOS set to manually shut it down at like 85 degrees celcius or something. Do i have a bad chip set or is my heat sink not good enough? AMD Athlon 64 3200+ Venice 2.o socket 939-chipset BIOSTAR NF4ST-A9 Socket 939 NVIDIA nForce4 ATX AMD-Motherboard BIOSTAR V6202EL63 GeForce 6200 LE 256MB TurboCache(64M VRAM on board) 32-bit GDDR2 PCI Express x16 Low Profile-video card