Zalman ZM-NB47J Fanless Northbridge Heatsink 1.ZM-NB47J DON'T REQUIRE A FAN AND DON'T NEED TO BE POWERED AND DON'T CREATE NOISE OR VIBRATION 2.NORTHBRIDGE CHIPSET CAN BE COOLED DOWN WITHOUT GENERATION OF NOISE 3. ZM-NB47J cannot be used on motherboards that lack mounting holes around the Northbridge chipset. 4. If the provided push pins don't match the holes on the motherboard, use the push pins supplied with motherboard.