Need some help, probably very basic.  I have 2 GTX970 cards (Driver ver. 361.91) .  I had them in the first and third slots on the board with the SLI connector installed.  But I did not see the SLI configuration in the NVidia control panel.  I read a few forums and people suggested switching slots for the last card so now they are side by side, first and second slots, but I do not see the second card in the NVidia control panel at all.
I assume slots 1 and 3 were correct...  by why isn't the SLI settings showing?  Any help to suggest?
Thanks!