60mm to 80mm fan adaptors for cpu fans

[xsquid]

Has anyone tried one of these? I am thinking about getting one of these and the 35 cfm 80mm fan for my cpu. It is only 33dbm. I was just wondering if anyone has used one of these, and how do you like it?

You can see it here

fan adaptor

 

[Barnaby W. Füi]

It won't improve performance, but it can allow you to keep same performance at lower noise. It's been tested at HardOCP and other places.