I recently upgraded my motherboard and CPU on my computer about 2 months ago. Since then, I have been experiencing random and unwarned reboots multiple times a day. It seems to happen most often when gaming, but has happened when sitting idle at the desktop, using a web browser, or even during the boot process. I have been monitoring the temperatures of both the GPU and CPU to make sure they weren't overheating -- they both were at normal temps each time I happen to glance at it right before a reboot would happen. I have gone through a few software troubleshooting steps that didn't solve the issue: tried a few different windows 7 installs, unchecked the "automatic restart" option under System Properties > Advanced > Startup and Recovery > System Failure, scanned for viruses/malware, updated any drivers. None of these helped so I assumed it might be a hardware issue. I upgraded my PSU (it was old and needed replacing anyway) and bought a bigger HDD and the problem persisted. Next was my RAM, I ran a memtest and the results came back positive. I have a friend with the exact same motherboard and similar RAM specs and he isn't getting rebooting issues so I don't believe the RAM would be causing it, although I'm sure its possible. I'm not sure if the GPU would be causing this or how I could check, all i know is that it isn't overheating. The only thing left are the motherboard and CPU that I bought the same day. Does anyone have any ideas as to what could be causing this?
Here are my parts
Motherboard: ASUS GRYPHON Z87
GPU: MSI R6950 Twin Frozr III
CPU: Intel i5-4690K
PSU: Corsair CX750M
RAM: (2 x 4GB) PNY 8.00GB Dual-Channel DDR3 @ 666MHz (9-9-9-24) (4GBH2X02E99924-165-H)
HDD: ST1000DM003-1ER1
DVD: HL-DT-ST DVDRAM GH2NS90
Here are my parts
Motherboard: ASUS GRYPHON Z87
GPU: MSI R6950 Twin Frozr III
CPU: Intel i5-4690K
PSU: Corsair CX750M
RAM: (2 x 4GB) PNY 8.00GB Dual-Channel DDR3 @ 666MHz (9-9-9-24) (4GBH2X02E99924-165-H)
HDD: ST1000DM003-1ER1
DVD: HL-DT-ST DVDRAM GH2NS90