When I use a PCI-e video card in PC I don't get a signal to my monitor. I had a 680i before and I thought that the slots were bad so I RMA'd it to EVGA and got a 780i as a replacement. But even with the brand new board I am still having the same problem. It's some compatibility issue that I can't figure out, because if I stick a PCI card into one the the PCI slots it works fine. It's not a bad video card or monitor as I have tried several. Does anyone have an ideas on why the PCI slots would work fine and all the PCI-e slots don't give signals? I also tried a new power supply and got the same so I don't think it's that either. I'm really stumped on what could even be the problem and I was hoping for some ideas from anyone out there, thanks.