Is my PSU Dying?

[Cheeseiron]

Hello.
I just built a new computer. The specs are Asus P8Z77 Mobo, i5-3570k CPU, GTX 480 GPU, 8gb 1600mhz DDR3 ram (single), and the power supply powering it all is a Thermaltake Toughpower 750w standard (http://www.thermaltakeusa.com/Product.aspx?C=1264&ID=1502#Tab) which I BTW bought used... I no thats typically a no-no but thats how it is...

The first 24 hours went very well, I could run Crysis 2 maxed out lagglessly, Unigine, etc... I set up my steam games to download during the night and went to bed... The next day, I installed and played the free mod DayZ, for arma 2. I played for about half and hour, and suddenly, at a very non-intensive part of the game to be exact, and without any warnign, my PC just flatout shutdown. No errors, no BSOD, nothing. I am on a surge protector, so I ruled out a power surge. When I rebooted, I made sure no overclocks were on, just to rule out any overheating. THen I booted up and got back into DayZ (basically arma 2 OA) for about 15 minutes and it happened AGAIN. This time in the bios, I turned fan speed to turbo, to enhance cooling. I got into windows, and started arma 2 shortly after. Then, as a test, I decided to run the Arma 2 graphics benchmarker. The VERY second that it finished loading, my computer shut down. When it booted up again, it came up with a message "Power supply surges detected during the previous power on. Asus Antisurge was triggered to protect system from unstable power supply unit" Now I realized I might have an issue with my power supply, so I shut down and have been doing research on a new PSU. I was looking into that for the future anyways, but I wanted to get the opinion of this forum first. I am most likely going to get the Corsair AX850 PSU, and I am asking, if A:Is it my PSU causing this issue and B: Will this new PSU be a necessary fix (and yes I know it is overkill but I want room to grow)

Thank you...
-Cheeseiron

 

[Bobnova]

That thing really ought to be able to take it, but it does sound like it could be the PSU.

You can check the voltage it is putting out with a multimeter if you have one.
If not, replacing that PSU with a known good unit certainly isn't a bad idea.
An 850w is a bit overkill for a 77w CPU and 300w GPU though.

If you can't check with a multimeter I'd hold off on gaming until you have a new PSU.

With a multimeter, put the black probe into either middle pin of a Molex.
With the red probe check the voltage on a yellow wire in a Molex, it should be 12v or so.
The red wire should be 5v.
Orange wires should be 3.3v.

With the multimeter reading the 12v start a 3d load and observe the voltage. If it goes way down or way up, there's your culprit.
If it doesn't, it may be something else.

 

[Cheeseiron]

FIXED

Hey, thanks Bobnova... I did not do a multimeter test, but I was pretty sure the PSU was failing. So today I went to Frys and picked up the Corsair AX750... And thats been sofar working like a charm... Thank you so much for the help...

-Cheeseiron

 

[Bobnova]

Awesome, glad you get things working