Not sure on what to do

[Dhope]

Hello, so a few months back my motherboard (Asus h81m-c) fried and wouldn't let my pc start up, so I then replaced the motherboard with a new one, and bought a new powersupply (seasonic s12ii 620w 80+ Bronze) , a week after I bought those two my gpu ports fried, what can I do about it, the place where I plug all my cables (not sure what it's called) can handle up to 2500 watts. And I'm afraid of replacing the fried gpu and getting a new one burnt, what can I do? 

 

Specs:

Asus Strix gtx 970

Asus vg278qr and a TV monitor

I5 4590

2x8 HYPERX fury black 1600 mhz

Asus h81m-c

Seasonic s12ii 80+ bronze

Coolermaster masterbox 5 rgb