i am thinking of getting two sapphire 7970 ghz vapor x cards for crossfire. they will fit ok but as they are a two and half slot card i will only have about 15 millimeter gap between the two cards. i have a 200 millimeter fan on the side off the case blowing straight on to the cards.the case is a xigmatek elsyium and has pretty good cooling. is a 15 mill gap ok or should i rethink. i will post some pics when done.