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need help with computer shutting itself off

so to start with i build my Pc about a year and a half ago with the following
Asus M5a99x EVO motherboard
AMD single core cpu ( cant remember exactly now)
160GB HD
Asus Radeon HD 6660
G7 power extreme 680 watt psu
16Gb Ram
I have since added a 2TB Hd and changed the cpu to a AMD FX 8350 8 core 4 GHZ
. This was all working fine up until two months ago where my computer started shutting off. It was though it had been unplugged as i would get no error message before turning up and only the windows didnt shut down properly when booting it back up and this would happen at any time after booting it up. I have gone down to my local pc shop and asked for advice and they have told me to unplug the fans, that worked for two weeks, they have told me to replace the psu so i got a G7 power extreme 780watt . My computer still continued to shut off i have also tried cleaning and reapplying the thermal paste on my cpu. in the last couple of days have also changed my graphics card toa EVGA Geforce GTX 760 2Gb GDDRS superclocked and it is still restarting.
any help would be greatly appreciated as i could really use my computer and dont want to have to worry about it switching off
8 answers Last reply Best Answer
More about computer shutting
  1. Computer is plugged direct to the wall?

    And I'd suggest this PSU;

    PCPartPicker part list / Price breakdown by merchant / Benchmarks

    Power Supply: EVGA 600B 600W 80+ Bronze Certified ATX Power Supply ($59.67 @ OutletPC)
    Total: $59.67
    (Prices include shipping, taxes, and discounts when available.)
    (Generated by PCPartPicker 2014-02-25 05:11 EST-0500)

    When getting a PSU, always get a well know brand that is know for quality of consistency and life-span.

    Seams like a pretty good MoBo, should handle those just fine...
  2. Sounds like something is dodgy for sure. Unless you have some rather malicious virus that's just force-shutting down your pc randomly, it's probably a hardware problem.
    My first candidates would be the PSU, but since you've replaced that, it's likely not the problem.
    Second would be that the motherboard is having issues with power and is just failing entirely or shorting on occasion.
    Lastly, I would try using your pc without the front panel connectors plugged in. It is possible that an issue there is causing a shut-down signal to be sent.
  3. at the moment it is plugged in to an extension and the 780 psu i have is less than a month old and the same make as my previous which was working fine for about a year so i am hoping not to have to change it
  4. Try to direct connect to the wall if you feel the wall outlet is safe.
  5. So I have direct connected it to a wall socket and it still shuts off I have noticed that when it last turned off when I went into the bios the CPU was 76 degrees celsius. Thanks for the help so far and any future help/advice you have
  6. Best answer
    Hmm, could be your CPU overheating, however you said you had reapplied thermal paste... It is possible that your CPU fan has died and is letting it overheat.
  7. It could be but I am unsure the fan itself is still turning another thing to note is that it currently seems to sit around 60 degrees Celsius on the bios and crashes as soon as any newer game plays things like minecraft seem to run ok but borderlands 2 and league of legends cause it to crash
  8. bought a coolermaster hyper 212 evo cpu fan earlier today innstalled it ran borderlands 2 and everything seems to be running fine now averaging temperatures of around 40-50 while idle and 50-60 while running borderlands 2 so thank you for the advice and hopefully this is the last of my trouble (fingers crossed)
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