Pc cutting out also bad frames

[Grandyboi]

Hi bought a gtx 780 ti and new psu corsair 750 put them in an played games found fps was very low I have fx 6300' oc to 3.9 so I played games like arma 3 ,dayz which I no has bad frames play for few hours then my pc started cutting out wen playing and then with out playing anything cut out also put my old gpu in started up played then cut out or dint boot up checked all cons all fine checked ram then put my old psu and old card pc turned on no USB and screen dint come on and it work all before so put new psu in again an old card boots up then cuts out again please help cheers hoping it not my gpu maybe mobo or CPU

 

[swifty_morgan]

check sound drivers......... only run ones you use. ( check device manager ) don't let windows reinstall or restart.

check all power connections to make sure they are securely attached. ( especially 20/24pin and 4/8pin ) 6/8pin pci-card

 

[Grandyboi]

Checked all pins and on sound there is nivdia def nivdia wave extensible and real tec