You attach a fan by using the included pins, as you can see in the first picture above. To remove them you can either use a knife under the round head and pry it upwards, or push in the pin from the bottom protrusion. SwifTech even has it printed on the bottom which way the heatsink installs. Great idea! Many newbies would usually get this bassackwards.

Also in the top left pic you notice a screw in the middle. There is one on each side. They provide tension to the 3-prong clips. The instructions say to lay the heatsink on the cpu and it snaps right on the motherboard notches. Took me a while to get that right, but once I got use to it, it was fairly easy. Once the clips are attached, you turn the tensions screws counter-clockwise till the screw head raises slightly (see the included instructions). This does make the heatsink very firm. And in fact more secure than most other heatsinks that attach with a clip.

Then to remove the heatsink you turn the screws clockwise to loosen the tension on the clips. I had to use a small screwdriver to assist in removing one clip. Then off it came. Since this is a rather large and heavy heatsink, take extra care in avoiding hitting any nearby capasitors.

-

Above you see close ups of the pins which you use to attach fans and a a close up view of the metal pins that make up the larger portion of this heatsink. Gives it an almost 'porcupine' look with them spread out like that. They are firmly installed, but you can move them if you try hard enough. But they don't have a flimsy feel at all. The pins being spread out does allow for better airflow to the base.

Above you see the MCX462-V installed with a 92MM Tornado fan on an Asus A7N8X motherboard. It is dangerously close to the capasitors. If you have this motherboard and would like this heatsink, take extra care in installing and removing it. And be wary of those capasitors.