FIXED Finally!!! I have had this issue for a long time and tried many things. In Linux I noticed it was crashing with 3d games too which made me look at the BIOS. This may be a issue with AMD64 and video card.
Other people suggested video card was going bad, bad power supply, not true!!
PNY 7600 GS 512
AMD 64 2600
MB - ASUS K8N
Fix for me was:
Windows:
1.) Turn off APIC stuff in the BIOS
2.) Must reinstall windows after this (Didn't work without reinstalling)
Linux:
1.) No reinstallation, only pass 'noapic' option to the kernel when booting.
Let me know if this works, it was very frustrating for me to find but now has been running for 2 weeks straight in my 3d game with no crashes.
bakerbp@gmail.com