Re: Geforce 8200 users, I need your help with finding usb hanging issue
Since USB is your problem try and disable it in the bios.
Then see if your system is stable.
Eliminate the problems until you have stability, repeat with any device causing problems until you find stability then add things back in 1 by 1 until if crashes.
The IRQ sharing problem common in those threads can apply to other devices as well, use the ideas in the threads to solve your problem.
The 8200/8300 chipsets don't seem to like irq sharing on the PCI-E bus with current kernels/drivers.