PC Switches off randomly with no warnings at all

Reduxx

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Apr 13, 2015
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Hello, this is my first post on this website, but i thought it may be the best place for help. I had recently (about 2 months ago) ordered a new PC, as i needed an upgrade from a laptop. It worked fine for the first month or so, however now it seems to rarely work for me. It usually just shuts sown at random, sometimes on boot up and sometimes after i have been using it for a while. I have tried many things to stop this from happening, like changing the plug socket, checking all parts are completely inserted correctly, and all seems to be fine. however when i refreshed windows, and lost most of my programs, it seemed to work fine for me. After i had installed some programs (e.g. Steam and winrar etc.) it had then begun happening again. I do however also hear a quite loud 'click' every time the system shuts off, and i believe it is located around the PSU area. I know that temperature is not an issue as it is kept well-cooled and i have checked temperatures of the components, none of which seem to be up at an alarming rate. Any help would be great thanks.
Specs are as follows:
CPU: AMD FX 9590 Black Edition
CPU Cooler: Corsair H100i Extreme Water Cooler
Operating System: Windows 8.1 (64-bit)
Motherboard: Gigabyte 990FXA-UD5
Memory: 8GB Corsair 1866mhz Vengeance (2x4GB)
Hard Drive: 1TB S-ATAIII 6.0Gb/s
Optical Drive: 22x DVD±RW DL S-ATA
Graphics card: Asus GeForce GTX 980 4GB Strix OC
Sound card: Onboard 7.1 Audio
Case: Cooler Master Cosmos SE
PSU: 750W Corsair CS Modular

(However i do believe the issue is mainly situated in the PSU)
PC was prebuilt, parts chosen by me from DinoPC as i was too worried about building myself.

Also, i have recently brought the max CPU usage down to about 75% and it seems to be working fine. Updates will be posted. :)
 

Reduxx

Reputable
Apr 13, 2015
7
0
4,510


Thanks for the speedy reply. Other than the PSU not being good,would you think that 750W is enough for all the parts?
Also, which PSU's would you recommend from the tier list you have linked me?

Thanks