Hmm.. We have been using similar to replace those Nforce northbridge coolers that have nasty habit on breaking ..
If I were to try this on my own, I might start testing with
http://www.zalman.co.kr/english/product/nb32j.htm
I'm quite sure it shoud be enough, and it woudl be a bit lighter and thus stress CPU card a bit less.
http://somequicknotes.blogspot.com/index.html