A little off topic here, but should i used both xfire bridge connectors? I have tried it both ways and not noticed any difference, I have 2 3870s (see sig). I have done quite a bit of searching on the internet for pictures, and i seemed to come up with about 50/50 of the people using both or only one.
You probably won't notice much of a difference either way, but the two bridges will give the cards a little more bandwidth to work with. If you can, just use both.