[jtroutma]

Well the shroud doesnt have to be 70 x 70, It could only be 60 x 60 and still perform well. If you want the volume of air at a low noise rating, go with a 120mm fan with a shroud down to 60mm.

Some fins will probably be exposed on the sides of the heatsink but when you are moving 65+ cfms vs 45cfms over that heatsink, do you really think that little bit will hurt performance much?

Just a thought.


Another way you could do it is to use an oversized shroud so it goes over the whole heatsink but you might loose some cooling because of the traped heat in the center of the heatsink. Mounting that thing would be the problem............