MY PC is pretty old, from around 2003 I think. This problem's been around for a while, but I always thought it was someho0w related to my graphics card ( since the fan on it didn't work) but now I've finally replaced it and the problem persists. I've looked around some, and apparently it's a problem with the motherboard / chipset (or a combination). Specs are as follows: MSI MS-7046 motherboard Intel i915p chipset ATI Radeon HD4350 graphics card 2x 512 DDR-SDRAM memory Intel P4 540 @ 3.2 GHz I've checked around in the BIOS, but the options appear to be hidden, so I can't check the PC health or anything. The temperature that CPUID reports is a staggering 66 degrees, which doesn't seem realistic. The system reboots if I start doing anything graphically intense (mostly gaming). Is there any solution or is this just a crap mobo and the only solution is replacing it? rebels havenforum.com/sis-bin/ultimatebb.cgi?ubb=get_topic;f=21;t=000524 appears to describe my problem pretty accurately (found it by searching around some), but no solution. I put some spaces in the link because apparently I'm not supposed to post links.