I got a Artic Cooling Freezer 64 Pro on my 3700+ and it works great.. quiet as well, I think RNT is more on the solution to your problem though.. chipset fans are crazy loud when dirty .. remember the Epox motherboard k8Ha+ .. they were very bad for it..
If it is the chipset.. you may want to look at a Zalman ZM-NB47J fanless cooling. (if you need one PM me.. i got some here as I sold a bunch of Epox motherboards and replaced most of them with the Zm-NB47J's
http://www.ncix.com/products/index.p...=ZALMAN%20TECH
BOSSMAN