ZM-NB47J does not require a fan, thus does not need to be powered, and does not generate noise or vibration. The Northbridge chipset can be cooled to an optimal temperature without generation of noise. You can adjust the direction while in installation. So you can prevent the interference with CPU Coolers and other components.   ※ Recommended CPU Coolers   CNPS6000 (Socket 462), CNPS6500B (Socket 478), CNPS7000B (Socket 462/478/754/939/940), CNPS7700 (Socket 775/478/754/939/940) and CNPS9500 (Socket 775/478/754/939/940) allow more stable and silent operation.

ZM-NB47J is compatible with all Northbridge chipsets that do not have a built-in graphics core. Northbridge chipsets with built-in graphics core are compatible ONLY IF the following conditions are met.   1) The Northbridge chipset MUST be located between the CPU socket and AGP (or PCle) slot. 2) The CPU cooler must be one of the Recommended CPU Coolers mentioned above.

Dimensions 37(L) x 37(W) x 47(H) mm Weight 54g Heatsink Material Aluminum

- One ZM-NB47J Heatsink - One Supply of Thermal Grease - Bolts, Nuts, Links, Push Pins, Springs (Two of Each)

Zalman affixes a Computer Noise Prevention System (CNPS) mark to all components used for noiseless computers.

ZM-NB47J cannot be used on motherboards that lack mounting holes around the Northbridge chipset. If the provided push pins don't match the holes on the motherboard, use the push pins supplied with motherboard. Do not install ZM-NB47J if it interferes with components on the motherboard.   ※ Caution In the event of skin contact with thermal grease, promptly clean off with water. In the event of eye contact with thermal grease, contact a physician immediately.