Hello, I recently picked up an X58 SLI LE board with the intent to run 3x GTX 260s in SLI. I didn't do as much digging into the slot wiring as I should, and when it arrived I realized the 4 x16 sized slots are wired x16 x8 x4 x8. I was hoping to keep 0 slot spacing between each card because the case I'm using won't accommodate a 2 slot tall card in the lowest x8 slot, which means running the third card in the x4 slot. I saw in the product manual that there were two 3-way bridges that came with the board originally. One for 0 slot spacing and one for 0 + 1 to allow for a single slot PhysX card between cards 2 and 3.
 
From my understanding, putting the third card in the x4 slot for 3-way would significantly hamper performance. Am I missing something? Why would the 0 slot spacing bridge be included if it was for a sub-optimal configuration? Or is it actually fine to run the third card in the x4 slot?
 
I don't have the 0 + 1 bridge or a single slot rear I/O panel to test, but I might pick up another bridge and just run the third card without a rear I/O bracket to test. If I can solve this ahead of time, though, that would be preferable.