System will run OK for several hours to several days unless I use some intensive processor programs like a video rendering program. But even if I just let the system idle, it will eventually blue screen and reboot. I ran the Intel diagnostic tool and it fails the clock test and produces a warning about the CPU freq. Reset the Bios to default settings and got the same results. System is pretty basic. I have attached the test result file for reference.
MB is an ASUS Z87-A
OS is Windows 7 Pro patched to current
using on-board video and sound (no video or sound boards)
8 GB DDR3 Crucial memory part number BLS4G3D1609DS1S00
Western digital disk drives 1TB HDD and 1 3TB HDD
LG optical drive
600 watt power suppy