Those looking for the biggest thing in graphics cooling may find the new Accelero Xtreme 8800 and 2900 coolers a perfect solution.
Famed for its oversized replacement graphics coolers, Artic Cooling took a step up in size to include three fans in its latest design. Using the same 107-fin copper sink, three 92 mm fans and 5-heatpipe design, the Xtreme 8800 and Xtreme 2900 differ mostly in installation hardware.
The combination of fans is capable of delivering up to 63 CFM airflow, affording Artic Cooling a claimed 20°C drop in graphics core temperatures at far lower noise levels.
Three low-speed fans and an oversized sinks increase cooling and decrease noise
even if it might take up another slot..
I think that some of the more recent designs with rear exhaust make a lot of sense....:)