So I have a GTX 660 and a GTX 660 Ti and I can't make them both work at the same time.
My
mobo has one x16 PCI and two 1x PCI slots and a BIOS with fairly limited options and onboard graphics. I also have 2
powered risers to play with. I use windows and the 6 pin connectors on the cards are attached all the time.
I mostly tried to get the cards working while I was using the onboard graphics, but even if the primary card was in the PCI x16, I couldn't make them both work.
I tried to use only one card in the x1 slots, but it was only working if I used the second (the one below the x16) slot, the other doesn't seem to work.
What's interesting is that now one card is running fine in the PCI x16 slot while the other is on a riser in the second x1 slot and if I power the riser the fan on that card is idlling (barely making any noise) but if I unpower the riser the fan runs at 100% and never backs down. Can't see that card in device manager either way.
Any suggestions?