basically im going to be getting two 5850's in cf and at load, the fans will be a nightmare of a sound, im thinking of getting after market coolers because A, they tend to do a better job of keeping it cool and B theyre a LOT quieter
I need the coolers to fit the card with enough space for them to run in crossfire
The best I have owned that worked and is quality is the Zalman VF1000. It does a very good job when I use it on my 8800gtx but you need to be able to properly cool the VRM though which isn't easy. The little ramsinks will do the job for most projects but not in the case of the VRMs on your 5850.
Maybe with extreme OC and the fans cranked up, however my single reference 5850 at stock speeds and fans is silent in games and barely audible in Furmark, so unless you have your ear 1cm away I can't see how two would be that annoying.
aparently under load they sound rdiculous and from a lot of videos on youtube i can say its definately loud. and nforce, could i just add some copper to the ramsinks to improve the cooling?
Yes but normal thermal pads don't work you need a way to mount them with either pushpins or bolts. Arctic silver5 is the best compound for this type of application. They can't be lose or easily fall off or you could have a failure. Do you got any tools that you can do metal work with and some old heatsinks?
are you sure? it goes over the top of the cards and im pretty sure theyre dual plated so top and bottom can be mounted so either way so i have one one way and one the other then wih fans on both id had the cards for example the sound card would have air blowing over it too?