Starting a few weeks ago my computer hangs and restarts randomly and I can't figure out the cause of it. The hangs can last more than a minute, and the crashes are as if the power had gone out (no bluescreen, just suddenly dark then it restarts from the motherboard splash screen). Windows event logs are extremely unhelpful, pointing out only that "the previous shutdown was unexpected" but showing no errors that could point me to the cause. It seemed to happen after waking from sleep so I spent a long time messing with Windows and UEFI sleep settings to no avail. I also tried memtest, which turned up no errors, and updating the BIOS, which had no effect. I downloaded a program called Open Hardware Monitor which lets me track my motherboard's voltages. CPU VCore fluctuates quite a lot while idle, but consensus online is that this is normal behavior, throttling to save power and heat.
I have a sneaking suspicion that it's my PSU, which is one of the oldest parts in my rig, but I don't want to replace it until I know for certain. I also put in a new CPU recently, but the problem didn't start for a couple weeks after that so I don't think it's the problem, at least not directly.
OS: Windows 10 Home Premium OEM (Upgraded from Win7)
MoBo: ASRock 970 Extreme3
CPU: AMD FX-8320 8-Core
GPU: EVGA GeForce GTX 770
RAM: 4x4Gb Corsair DDR3
PSU: Corsair HX750 (750W)
Storage: Samsung 850 EVO 1Tb SSD, 2 generic HDDs with very little on them
I have a sneaking suspicion that it's my PSU, which is one of the oldest parts in my rig, but I don't want to replace it until I know for certain. I also put in a new CPU recently, but the problem didn't start for a couple weeks after that so I don't think it's the problem, at least not directly.
OS: Windows 10 Home Premium OEM (Upgraded from Win7)
MoBo: ASRock 970 Extreme3
CPU: AMD FX-8320 8-Core
GPU: EVGA GeForce GTX 770
RAM: 4x4Gb Corsair DDR3
PSU: Corsair HX750 (750W)
Storage: Samsung 850 EVO 1Tb SSD, 2 generic HDDs with very little on them
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