Aye. I was wondering if the heatsink was designed differently to help offset that, but then if that was the case, why wouldn't you use the same design on the larger PCB's. Makes me wonder if this card wouldn't just run a little hotter or with more noise.

Also, after looking at all the pictures, it doesn't appear as though it is more Centrifugal than Axial, and the open back on the shroud makes me believe it will through heat back into the case just as much, if not more than it will push out the back through vent holes in the slot plate.

That said, on that same Amazon link is a fairly confident review of the single fan vs double fan.