Computer randomly rebooting

[Chopstick217]

Hey guys, as the title states, my computer would randomly reboot. This problem didnt happen before. It could be while gaming, browsing the internet or watching a movie. My computer passes memtest and I have used prime 95 for over 24 hours. I still cant pinpoint why its rebooting. I also used this site:http://web.aanet.com.au/~SnooP/psucalc.php
to calculate my power consumption and it seems my PSU should be enough. Any help would greatly be appreciated. As always, thank you in advance. Computer specs are in my sig.

 

[In2Photos]

Can you try another PSU? Do you have a UPS that the PC is plugged in to? Is the battery good in it? A bad battery could cause the issue.

 

[Slugbait]

Random reboots are usually random crashes...and you forgot to mention what Event Viewer sez.

It apparently isn't heat or RAM.

Hmmm...you have five drives and a GTX 260, and a calculator sez your 520W PSU should be enough. I would usually suspect the PSU first, especially if it's four years old.

However, since it doesn't crash during Prime95, it appears the system actually has to be doing something to crash. In which case I suspect drivers...more specifically, video drivers. Did you happen to switch from ATi to nVidia recently?

 

[Chopstick217]

Originally posted by: In2Photos
Can you try another PSU? Do you have a UPS that the PC is plugged in to? Is the battery good in it? A bad battery could cause the issue.

It is plugged into a APC ES 750 UPS that i recently bought roughly 2 months ago. I think the battery is still good on it.

 

[Chopstick217]

Originally posted by: Slugbait
Random reboots are usually random crashes...and you forgot to mention what Event Viewer sez.

It apparently isn't heat or RAM.

Hmmm...you have five drives and a GTX 260, and a calculator sez your 520W PSU should be enough. I would usually suspect the PSU first, especially if it's four years old.

However, since it doesn't crash during Prime95, it appears the system actually has to be doing something to crash. In which case I suspect drivers...more specifically, video drivers. Did you happen to switch from ATi to nVidia recently?

I did have an ATI card before. I know its generally good practice to reformat after a new video card is installed. I will try using driver cleaner and reinstalling the drivers to see if that will solve the problem. Thank you

 

[Chopstick217]

OK so I reformatted and the problem hasnt occured since. Thank you Slugbait for the suggestion suspecting it was a driver issue.