Flexible fan installation Additional fan can be attached for use Suspend your fan above the CPU using this cleverly-designed adjustable bracket which affixes to the PC chassis by sharing the two or three screws which are used to secure PCIAGP cards. Taking this approach allows a larger fan diameter 92mm which means the fan blades can rotate slower to produce a given amount of airflow hence less noise. In addition no vibration is transmitted from the fan into the heatsink which is again good from a noise point of view & is also better for the processor itself.