The Zalman CNPS 7500B AlCu, features a quiet, downward blowing 110mm ball bearing fan at the heart of a radial array of aluminum and copper convection fins. Blue LEDs give the impression of an alien powersource as they reflect off the metallic fins and demonstrate Zalman's reputation for combining style and function. While the fan operates at low 32 dBA in its normal 2300 RPM setting, selecting Silent Mode using the included FAN MATE controller drops it nearly 50% to 17 dBA as well as eliminating vibration. With its unrestricted flow, it cools not only the CPU, but the RAM, VGA card, Northbridge and other nearby components. Heat is drawn away from the CPU by the base of the heatsink and it is transferred up into the twin semi-circular arrays of aluminum and copper fins for dissipation. The 7500 AlCu is only 60% the weight of the pure copper model which lessens the possibility of stress damage to the motherboard.

Zalman CNPS7500-AlCu Oem : aluminum+copper FHS + 110mm Fan : 1150/2300rpm , double ball bearing , noise 17/32db - for Intel LGA775 cpu , support 1156 via optional bracket