Zalman FB123 92mm Noiseless 92mm Fan w/bracket
Previous bracket design only allowed the use of 80mm fans. But with FB123, you can attach many types of fans (80, 92, & 120mm), as well as have up to 3 fans attached at the same time. Default fan is 92mm, so it provides excellent cooling performance while satisfying most stringent of users committed to noiselessness.

1) ZALMAN FB123 does not generate noise and vibration in silent mode.
2) Separation of the FHS from the CPU fan prevents transfer of the fan vibration to the CPU.
4) By utilizing a 92mm fan(ZM-F2), both the CPU and the motherboard chipset are cooled.
5) The cooling fan can be mounted at any desired location, making it compatible with virtually all computer cases and motherboards (Note: computer cases that have the power supply covering the CPU cannot be used).
6) Video cards can also be perfectly cooled without the use of the FB165 VGA Bracket.
7) CPU can be cooled to a temperature sufficiently below the temperature required by the CPU manufacturer in Silent Mode.
8) Zalman CPU Coolers enable very stable operation of a CPU in an OVERCLOCKED environment.
* Zalman Tech. Co., Ltd. is not responsible for any damage to systems or CPUs caused by CPU OVERCLOCKING.
http://www.zalman.co.kr/english/product/fb123.htm