i got a crosshair with dual 8800 gtx and DD NV80 blocks, since i'm making a water chiller i need to insulate the cards with closed cell insulation and a plate to hold to, so it will slightly reduce the space between the two cards, now i noticed on the one corner of the xfi they got some kind of circuit component (not sure what exactly it is) that's cube shaped which is the issue with the space in between the two vid cards