I have an Intel DQ57tm 1156 Board with i7 870 cpu with 4 gigs ddr3 (1333) Samsung 2gig modules, with a Asus GTX 550ti when i startup the PC the CPU fan spins for a
second then shuts down then automatically spins again then shuts down again consecutively, the board eventually started up after a while and i installed
windows 8 64bit PC was running smooth for hours without any glitches, next day then all of a sudden when i tried starting it up again then the problem started again,
I already tried switching memory modules checked if the CPU had enough thermal paste for possible overheating and tested with on board display as well.
Any help resolving this issue will be highly appreciated.
There are some steps to troubleshoot before determine you have a defective motherboard.
Try testing one memory module at a time, this will let you know if the me has something wrong.
Check different power supply.
Update computer BIOS to the latest version: Intel® Download Center