Thunder K7X Pro hanging under high load

Hello everyone,

I have a Thunder K7X Pro board and for some reason it crashes very often
when there is high load.

After rebooting the box, It always hangs at POST and I have to go into
the BIOS settings, hit save, then reboot to get it to continue the boot
process.

I've changed the RAM and CPUs but that hasn't helped. I've also updated
the BIOS to V1.08 (which I understand to be the latest).

Does anyone know how to fix this?

I'm using RedHat Enterprise Linux Server 5.3 on the machine, although I'm
pretty sure its not an OS issue since they same issue occurred when I was
using Windows Server 2003 on the machine.

Regards

Hamzah