Of Course the Alpha is only as good as the fan that cools it, the CO-6035MFC comes with a big 60mm x 25mm YS Tech fan that moves 26cfm of air. More than enough for the job. I did try to get the Alpha on a slot kit, and it was much easier. One physical test that I did on the clip was to slide the Alpha heatsink while it was secured on the motherboard socket, needless to say it wasn't an easy task. This was with the fan blowing down on the heatsink.
Alpha recommends that the fan show suck air out instead of blow air in.
By reversing the fan from blowing on the heatsink pins, to blowing away from them I did get a nice 2 C drop in temp. You should experiment to see which way works best for you. Since there are less expensive heatsinks that do a similar job, you may want to shop around. However, if you are looking for a great performing heatsink from one of the best heatsink manufacturers in the world, the Alpha CO-6035MFC is sure to put a smile on your face. All rights reserved.