Originally Posted by Neokolzia;14567399
When I go into the Crossfire Configuration with the cards, I notice massive temp diffrences with these non-reference designs at top/bottom.
Where with reference 100% exhaust noisy jet taking off in your case blower cards.
Though noisy, and not the coolest, they didn't have much of the same effect since they exhaust 100% of the air out the back and don't recycling it into the top card =\
I currently have a 14C difference under full load between my two 6950's.
I would recommend the Vortex's but still debating some clearance issues and if they would beable to tri-fire, bottom GPU runs very cool at 72C at about 70% fan, under extreme load.
^OP is only looking for a single card, not sure why you would even mention crossfire.
@OP, if you're looking to overclock, the Sapphire or MSI Twin Frozr would be your best bet. Though I would also look for a card that can definitely overvolt, non-overvolting cards are hard to overclock once you reach the wall of stock voltage.