Ducted Zalman 7000CU w/Countercurrent Flow Cooling
 

With the concurrent flow cooling shown in the image above, the cooling flow initially picks up a lot of heat but this diminishes quickly as the difference in temperature gets smaller. On the other hand, with counter-current flow cooling, the initial themperature difference isn’t as large, but it is maintained throughout, resulting in better cooling.

I tried to use the counter-current flow principle to the fullest in the CPU cooler. The Zalman 7000A seemed the best heatsink candidate for this project.



http://www.silentpcreview.com/article160-page1.html

nice work !!