Trying to diagnose faulty system. Mobo or CPU?

youngpip

Honorable
Mar 30, 2013
1
0
10,510
I'm trying to fix a family member's PC, but am a bit stuck as to which part is faulty.

Windows is extremely slow and will randomly freeze or even reboot. I ran memtest86 from a bootable USB stick but even that froze after a short while.

So I'm thinking faulty mobo or CPU, but not sure which and I don't have spares with me to test. The machine is about 2 years old. Motherboard is an Asus M4A79XTD and it has a Phenom II X4 965 CPU. RAM IS 8GB DDR3.

Any help much appreciated!
 

atomicWAR

Glorious
Ambassador
wow hard to trouble shoot this one with your lack of resources but lets try. first re-run memtest with on stick of ram....keep swapping sticks until it works...if it doesn't then try swapping slots the stick uses....again run memtest....if you can't find a stick or slot that does work your stuck with it could be memory, motherboard or cpu heck even a bad power-supply is possible. without parts to swap its very difficult to tell.