PC randomly restarting. No BSOD. Windows 8.1

[Rawryy]

My PC is randomly restarting.

Event viewer logs:

I researched and this is a hardware fault?

What shall I do next to find the hardware fault? How does memtest work? Is it a program that runs while on your PC or like a BIOS..download screen has made me confused?

I think its my power supply because of previous problems but now I'm not too sure.


Build:
http://uk.pcpartpick...y182/saved/2nzk
Any help appreciated

 

[Tripp]

make sure your memory timings are correct

 

[Wraith]

Event ID 41 usually points to PSU issues check your connections, but could also be a piece of hardware with mixed up voltages.

I'd be more inclined to check the PSU first grab a multimeter and check the output of all rail pins and CPU cable.

 

[KING_OF_SAND]

Well nothing indicates a definite power failure. I would buy a power supply tester (a needed tool for any PC enthusiast) You can get a nice one for under $30.

Lets get some questions out of the way here:

What are you doing when it fails?
Are you getting a beep code after failure or pre-boot?
Are all the connections snug? This includes wiring in its 20/24 pin and 4/8 pin.
Have you tried resetting the CMOS?