Again, I'm *not* talking about the bridge. I'm talking about the single/sli selection card that goes into the motherboard...
EDIT: This is what I'm talking about:
That card is double sided, put it one way, you run the slots independantly, oput it the other way it combines them. That is the single/sli selection card most SLI motherboards have. Some may not have that, but have jumpers instead. The Jetway and its new clone, the Evga use a three slot solution to eliminate the slowdown that occurs when a selector card or jumpers are used.