Zalman CNPS9900 MAX & CNPS5X CPU Coolers

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The most critical aspect of installation is that the heatsink be securely mounted. A firm mating results in good contact between the heatsink's base and the CPU heatspreader and more efficient heat conduction. Ideally it should also be a simple procedure with the user having to handle as few pieces of hardware as possible.

For Intel boards, a plastic retention ring is utilized with Zalman's own pushpin mounting system. The black pins can be inserted in two orientations, one way for LGA775 and the opposite for LGA1155/1156.

Once the ring is mounted, the retention mechanism hooks onto two tabs, one on each side.

The clips have two positions, one for AMD and the other Intel.

The CNPS5X mounting system is superior to the stock AMD system because the clips can be loosened and gently slipped under the notches with little difficulty before tightening. With the standard AMD lever spring, you often have to struggle against the tension to clip it in place.

Fully installed on our AM3 test board.

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