I have had a strange ongoing problem.
Short Story, bought an MSI GTX 970 a month or so back. It worked for 3 weeks, then during a play of the witcher it crashed. I could not at all get it to send a signal to the monitor, so I sent it back in. In the meantime I put my GTX660 back in and it worked but had issues until I did a bios update and fixed my problems. A week later(yesterday) I received my new Computer case and an exchange of the MSI video card I bought. I put everything in the new case and the new video card in and again same problem, go to boot up and no signal to the monitors, fans begin to spin and then stop 10 seconds after. I have tried all 3 pcie slots as well. I also did remove old drivers before putting new card in. After messing around with it some more this afternoon i got frustrated and threw my gtx 660 back in and it starts up no problem, even the integrated graphics card was hanging up on windows start.
Here is where it gets strange, If I put my friends GTX 780 in my computer it works fine, if I put the GTX 970 I just bought into his computer it works fine. I cannot for the life of me figure this out.....
MSI Z77A-GD45 is my board.
MSI GTX 960 GAMING 4G is my old card.
EVGA 750W PSU