PC rebbot by itself

Grimcut

Reputable
Apr 7, 2014
1
0
4,510
Hi there. As the title says, I'm having a problem with my PC, it restarts randomly, either on the desktop or while I'm playing games. I already checked the temps, they are good. I ran Memtest86 it didn't report any errors. Event though speedfan reports the voltages of my PSU are way off the tolerance range I did a quick reading using a multimeter and it seemed fine to me, will do it again later. I just can't pinpoint what may be causing the rebooting. Sometimes I can go for hours without an issue and then after a random restart it will only stay on for like 2 or 3 minutes. Only after I unplug the PSU and wait for a couple of minutes before turning the PC on it will work "normal" for a couple of hours. Need help or at least some new ideas to what may be causing the crashes. Event viewer doesn't report anything except for the unexpected shutdowns, no malware, at least none detected.
PC specs, PC has about 4 years
Motherboard: Asus M4A77TD PRO
CPU: AMD Phenom II X4 970 AM3
CPU cooler: Cooler Master Hyper 212 Evo
PSU: Be Quiet Pure Power L7 530W
GPU: PowerColor Radeon PCS+ HD6850 1GB GDDR5 PCI-E
RAM: GSKILL PC3-12800 6GB NQ CL9 (3x2GB) DDR3
HDD: Samsung SpinPoint F3 1TB 7200RPM 32MB SATA 3.5"
Windows 7
 
Solution
I believe the thermal hardware protection for AMD's cpus is to just spontaneously reboot so make sure it isn't overheating, if the temperature readings all look normal in HWmonitor or whatever, try underclocking/undervolting slightly and see if it makes a difference, other than that it sounds like it could be PSU related so test it with a different one if you have access to one.

AndyKurtis

Honorable
Jan 6, 2014
32
0
10,540
I believe the thermal hardware protection for AMD's cpus is to just spontaneously reboot so make sure it isn't overheating, if the temperature readings all look normal in HWmonitor or whatever, try underclocking/undervolting slightly and see if it makes a difference, other than that it sounds like it could be PSU related so test it with a different one if you have access to one.
 
Solution