I just got a second 560ti to sli. When I installed it my PC wouldn't turn on so I took it out. I figured out that somehow the 4 pin to my mobo had gotten knocked loose so I set it back and it turned on fine. But then it froze and I haven't been able to get it to turn boot since. The computer turns on but to the best of my knowledge all it does when I turn it on is spin the fans I never see the BIOS startup screen. I have an x58 extreme motherboard. I think I should hard reset but I'm not sure if I need to and I also am not sure that this is a hard reset issue. If I should hard reset could you please tell me how to do it please as I am not sure what I need to do. Thanks for the help.