Hello, I just bought a brand new EVGA gtx 970 to upgrade my 570 on a z77 gigabyte mobo. After installing it, I turned my comp on and the mobo splash pic (with bios hot key info) comes up and stays there quite a bit longer than usual then I just get an empty black screen. I popped the case open and took a look, the fans on the gpu i just installed are working, that is, they are twitching so im pretty sure that means its receiving power as i think it only turns on the fans when the gpu starts heating up. I installed it in the same port that my 570 has been in and I'm running windows 7, please, if anyone can help at all that would be great