Best overclocking fan for cpu Heatsink

[kal20mx]

I was thinking of getting me a http://www.newegg.com/Product/Product.aspx?Item=N82E16835103057
But then I saw some Heatsinks without fans like the http://www.newegg.com/Product/Product.aspx?Item=N82E16835233032 and was thinking what if I added a fan like this one http://www.newegg.com/Product/Product.aspx?Item=N82E16835706015 would it be able to do some good overclocking? Thors hammers cpu heatsink says that you can install a fan on that one.

 

[jbakerlent]

I'd just get this one
COOLER MASTER Hyper 212 Plus Intel Core i5 & Intel Core i7 compatible RR-B10-212P-GP 120mm "heatpipe direct contact" Long life sleeve
http://www.newegg.com/Product/Product.aspx?Item=N82E16835103065