Bjorn3D posted a review on the Swiftech Mcx159-cu Chipset Cooler

One thing that I don’t like with many nForce4 motherboards is that their Northbridge chipset get quite hot and most companies thus have to use fans to coole the chipset. There’s nothing wrong with using a fan but too many companies put fast spinning fans that both are loud and prone to failure after a while. I had an ASUS nForce 4 motherboard where the chipset fan not only was loud but also died on me after a year.

Swiftech Mcx159-cu Chipset Cooler Review