I don't think it is overheating as it has been running fine for the past 4 months.
I have artic cooling fans in the system and the GC temp is 32 on my display.
System is
Ati Radeon EAX-X1900 XT-X 512mb (pci express)
2 x Western Digital 250GB Hard Drives
FSP Sparkle FX700-GLN Epsilon 700w ATX2.0 PSU
Asus A8R32-MVP Deluxe Crossfire Motherboard
AMD Athlon 64X2 Dual Core 4200+
Corsair 2GB DDR Pro Twin
Anymore help would be great Cheers.