My pc just stop displaying when on load my gpu or psu's fault?

whenever I try and run anything demanding ie: 2 tabs of youtube, counter strike, etc

My pc crashes. but the sound still works fine, I can hear everything that was playing before it turned off, but inputs and display stop running

What I’ve tried:

Re-installing windows

Trying different 8 pin connectors to power my GPU

using an i7 4770k to see if my CPU was the problem

using a different monitor

Specs:

i74790k

gtx 970

Cooler master g750m power supply

gigabyte z970x-soc force mobo

2 random hard drives

Any help is appreciated :)