PC Randomly rebooting

[Naossoan]

Hi all,

I'm not sure when exactly this started happening, but it was recently.

I built a new PC several months ago and this was not happening until recently.

My computer will just randomly shut off, then start up again.
I checked the Event Viewer and there is nothing in there.
When the computer shuts down there is no warning what so ever.

I could be doing something intensive like playing a game, or doing practically nothing at all like browsing the net/reddit.

It will just shut down with no error messages, no blue screen, no crash messages, nothing. As mentioned I checked event viewer and there are no messages other than the Critical one showing the Kernel lost power unexpectedly.

My system has a 750W Corsair Gold rated modular PSU
Windows 8
MSI GTX670
16GB Corsair Vengeance memory
3 HDD and 1 SSD

Nothing has changed hardware wise in this system since I built it, but this rebooting only started like within the last couple of weeks...

I have no idea what could be causing this. Any suggestions?

 

[Fira]

Turn on your computer.

Replace F11 with whatever (example F12) also replace delete with whatever (example Insert).

When a black page comes up with white text press F11 and see what comes up and click around if nothing then restart your computer and when a black page comes up with white text press Insert and click around.

When you see something or somethings or both that states at what temperature the computer gets shut off at, turn it off [meaning make it to where the computer will not shut off at any temperature], then save then restart again, that should work but not sure though but good luck to ya.

 

[Pray To Jesus]

Turn on your computer.

Replace F11 with whatever (example F12) also replace delete with whatever (example Insert).

When a black page comes up with white text press F11 and see what comes up and click around if nothing then restart your computer and when a black page comes up with white text press Insert and click around.

When you see something or somethings or both that states at what temperature the computer gets shut off at, turn it off [meaning make it to where the computer will not shut off at any temperature], then save then restart again, that should work but not sure though but good luck to ya.

WTF are you talking about?

 

[Pray To Jesus]

#1) Blue screen doesn't show in Win7. Set it to show the bluescreen and not autorestart.
#2) Could be your power supply causing this. Get a new PSU and replace.
#3) Don't overclock any of your components.

 

[Naossoan]

I'm pretty sure what Fira was saying was get into the BIOS and change the settings so the PC won't restart no matter what temperature the CPU is at.

I'm sure that's not the problem though because I monitor CPU temperature and it doesn't get that high, I have a Corsair H100 cooling it.

Now that I think about it actually, I have recently installed another 8GB of DDR3 memory. I don't remember if these restarts started happening before or after I put that RAM in though. Maybe I'll take the RAM out and see if it continues to reboot.

If it doesn't then obviously some kind of issue with the RAM.

 

[Steltek]

Download a copy of the MEMTEST86+ ISO, burn it to CD, and use it to test the memory modules. Test each module separately through multiple passes.

If it is not the memory, I'd follow up by trying to swap out the power supply. Next step, check the firmware on your SSD to make sure it is the most recent available. You could also try to disable sleep as some SSDs don't handle recovering from sleep mode very well.

 

[denis280]

WTF are you talking about?

Yeah??
No bsod. then check psu. ram like steltek just mention.and did you just updated drivers lately.
and to stop restart. go to computer/properties/Advance system setting/Startup and recovery/setting/uncheck Automatically restart

 

[Matt1970]

Instant reboots with nothing in the event viewer will more than likely be a power supply issue.

 

[Matt1970]

I'm pretty sure what Fira was saying was get into the BIOS and change the settings so the PC won't restart no matter what temperature the CPU is at.

I'm pretty sure what Fira was saying is that he/she has no buisness giving computer advise.