Since most companies dont list their HSFs being compatable with the 7600GT and since the stock cooler is loud I thought I would make up a list of what I've read is and what I know is compatable with the card. *I* for one was scared to buy one because I didnt want to buy it and have it not fit.
What I've read(from another forum, they say the info is from zalman):
Zalman 900 series
What the companies have told me:
Thermalright V-1 - not sure about the Ultra version, but I dont see why it wouldnt fit.
What I know:
Arctic Cooling NV6Rev2.
My ACNV6rev2 fits perfectly on the card, but it is only a sidegrade as far as cooling goes. The card still loads around 48-50c, just with a LOT less noise. The overclocks on the card are still 600/1600(auto-detecting software OC, not max stable) over the stock 580/1500. Overall I'd say it was well worth buying as I couldnt take the noise any longer. I chose it over the Zalmans because I like how it exhausts the heat and I liked my old Silencer over my Alcu700. Plus the VF900 was a lot more then I wanted to spend right now :(.
Zipzoomfly seems to be the best place to buy the Zalman and AC series because they have free shipping :).
Hope this helps.