four fans , two,, Blowing In, one the bottom left side , one bottom front panel.
two,, Blowing Out,, one top rear panel,, and one on top panel i mounted right over the cooler.
now i think i will change the one on top blowing in over the cooler,,
but some how i think the cooler is not pulling the heat out of the cpu efficiency , i have been looking at case fans and a 135mm fan for the cooler , that is if i can get zalman to sell one to me.
this cooler is a good looking enough i can use it is my pc.
i run prime95 about four hours , it flexed beteen 45c-48c under 100%load.