Hi, a month ago my computer was restarting for no reason. It wasn't a crash since windows didn't even know it was going down (no event's log).
It's the same restart as when a computer overheat. It just cut the power and reboot.
I suspected corrupted ram so i did several system checks, removed both stick to see wich one was faulty and even exchanged them with another computer. Wasn't the ram.
Then i suspected the Power Supply but when i plugged it directly in the wall. The computer was fine o_O.
Back then i was connected to a APC ES500, it has a 300W power output with the battery so i switched yesterday for a ES650 (390W). My power supply is a ThermalTake 360W so this UPS should hold the load with no problems.
So today i switched back the computer from the wall to the UPS and it restarted again for no reason o_O
How can a power supply dislike UPS after a year and a half being on one?
Don't know if you are still looking for any input on this but what the heck...check the UPS! They can go bad too.
I don't have any suggestions for checking the UPS except to try another one and see if you have the same results. Borrow one from a friend.
check your Battery in the UPS ( test it ) unplug the backup while the computer is on and see what happens! It could be that the Battery got a memory to say and will no longer supply the requied wattage to provide for proper shut down of the PC. Heance could be the reason for the random reboots!
Your backup is supposed to provide proper power if the outlet is to drop below the required voltage on the wall outlet ( happens alot here in my house ) outlet may have power but not enough sometimes to much
Basic UPS cant handle my load since I got a 550 watt PS and other lovely power hungry components, AND a 19" CRT monitor (I'm cheap). But even if I had lower wattage, I don't use UPS anymore. The typical battery pack can't handle modern systems, and they're unreliable in my experience.
Are you out there Xephon? The APC website has some information that may help you sort this out. One of the questions I have about your UPS is about the warning lights/sounds. Does anything happen to the UPS when the computer fails?
Here is another question, what do you have plugged into the UPS and specifically what do you have plugged into the battery backup outlets of the UPS? It is recomended not to plug a printer into the battery backup outlets.