im going for the cyclones a simple design maybe not the greatest OC of all, but at 850 core will do the job in SLI an as open cards they are you can put a fan near and thats it or even put some enzotech ramsinks over the vrm zone

talking to a friend thats an Electronic Ing he said that prolly the vrm are soldered over a copper flat surface over the PCB to disipate as if you zoom that zone you can see something under the chips, i think just the problem becomes on going over 1.1+

cheers all
Sergio