[SOLVED] Random reboots without BSOD

[Padoru]

I have had this PC for almost 6 years, no problems at all, but I stopped using it for some time and when i wanted to work in it again, it bootlooped like crazy and couldn't do much while windows was functioning. After some research, I reinstalled windows and cleaned all the fans in the case, incluiding the CPU and PSU fans, also changed the thermal paste, which was dry.

Now it is more stable and I can work on windows normally, but still reboots randomly in the same way as it did at first, without BSODs, logs or errors (event viewer only registers this as kernel error 41) . This now happens in between an hour or two, indistinctly if the pc is gaming, downloading something or just idling.

Since then, I have tried:

• Testing the RAM (no errors)
• Swapping Ram position (seems to have increased stability, but still reboots sometimes)
• Updating the BIOS (no changes)
• Updating Motherboard drivers (no changes)
• Disabling auto reboot (no BSODs)
• Checking temperatures with HWinfo ( I haven't seen bad temperatures, but if someone wants to see, here are two logs (high and low load), both of them ended registering at the time the reboot occured)

My specs are:
GPU - GTX 770 ASUS DirectCU II OC 2GB
CPU - Intel(R) Core(TM) i5-4570 CPU @ 3.20GHz
RAM - 8GB Kingston DDR3 1600MHz
PSU - Cooler Master GX-750W
MOBO - ASUS B85M-G

Any clue on whats happening would be highly appreciated, thanks in advance.

 

[Ralston18]

Overall, the 6 year old PSU is a likely suspect.

Do you have a multimeter and know how to use it? Or have a knowledgeable family member or friend who does?

https://www.lifewire.com/how-to-manually-test-a-power-supply-with-a-multimeter-2626158

Not a full test as the PSU is not being tested underload. However, any voltages out of spec or near the limits would be of concern.