PSU: 1200w corsair gold
mobo: p8z77 work station
4x4g corsaire vengence 1600Hz.
Had several problem with kelper (driver stopped to work but could recoved by itself).
Got tired so I removed the sli option (on the nvidia settings). Everything went black and now everytimes I try to go on the Nvidia option it say that I currently do not have a Nvidia GPU attached to a display.
Have the lastest Nvidia driver installed. Unplguded 1 of the GPU, tryed both in differents PCIe slots, tryed different supply wire Nothing worked.
This is a new build so basicaly the PC never worked right at all.
P.S" The display is NOT on the mobo HDMI slots I didn't plugged it into the motherboard.
I heard from a lot of forum the exactly the same problem involving the the GTX 670 & the Asus p8z77. There are a few confirmations that this work but yeah, its a shame if it turns out PCIe 3.0 wont work. Anyway, it's worth a try.