Could I kill my motherboard while installing new graphic card?

LightRemedy

Honorable
Dec 17, 2013
9
0
10,510
I was using a 7770hd graphic card and changed it to Evga gtx 760.
I'm using hx650W and Z77M-D3H.
Now when I move back to my old graphic card and on board card it doesn't seem to boot up and the fan is very loud.