running a shuttle sn95g5 mobo fn95 v1.3, and all of a suddent Im having random reboots at 20 minute intervals. Also, BSOD happening occasionally with machine_check_exception. Tried to boot to memtest cd, but when tries to boot from the memtest cd, but fails and goes into a constant rebooting loop. sound like memory or the optical drive? Here's the setup WD 120GB ATA 133 Kingmax 512mb pc3200 RAM Model MPXC22D-38 ATI radeon 9000 pro Lite-On Cdr-rw combo