AMD still uses metal clips to attach its retail-boxed cooler over the CPU. With the cooler in position, slip the non-levered end over the corresponding plastic hook, then repeat the process on the levered end. Finish the installation by flipping the lever to apply pressure.

Pin-On Coolers

Intel introduced push-in pins to CPU cooling with its LGA775 package. Installation requires pushing each pin into the corresponding motherboard hole until a "click" is felt or heard.

Twisting the top of the pin ninety-degrees counterclockwise unlocks the spring pressure, allowing the cooler to be removed. Because a counter-clockwise twist defeats the latching mechanism, one should check that all pins are properly twisted fully-clockwise before attaching the cooler.

Screw On Coolers

The biggest problem with Intel's pushpin cooler mounting method is that it puts a lot of strain on four points of the motherboard. Several manufacturers require a support plate to be mounted under the board to properly distribute the load; these coolers are usually attached with screws.

Because the support plate must be placed behind the motherboard, these coolers should be mounted before the motherboard is installed into the case.