PSU problem? (link TH link inside)

[shuin_exe]

Hi, I consulted to different topic of this site:

http://www.tomshardware.com/answers/id-2439726/desktop-weird-problem.html#14897214

and we are debating either mobo or my PSU is my desktop problem.

If I were to change my psu, what is typically do I need to buy?

I saw a coolermaster 750w with an affordable price so if its ok I might go with that choice.

I have 6 fans and 1 fan for cpu water cooling.

my video card is r9 270x and using i7-2700 with 2x 4gb corsair vengeance memory.

 

[shuin_exe]

It is possible that not usb cable is interrupting but a cable of my processor fan or my case's sound cable connected near the cpu's fan? Down to that there's my gpu... Anyway gonna post pic later since i'm still on my job hope I can fix this already!

 

[shuin_exe]

UPDATE: yesterday after I got home I tweak some outside and inside wiring of my desktop... this includes the desktop case's usb port and cpu fan cable.

I even hurt myself because my finger hit the heatsink of cpu fan XD

anyway I experienced black screen at power on and hard reset it then my desktop comes to life... haven't tried long hour of power off since I'm using my desktop for whole day... gonna report tomorrow again if something happens...

P.S. whenever I saw the windows 8.1 automatic maintenance somehow my desktop slows down so I disabled it (I googled how to do it )