"Looking for a light weight heatsink that's compatible with both AMD and Intel processor platforms? The Auras LPT-709 heatsink is one such cooler, and it runs fairly quietly too. The LPT-709 comes with a 92mm PWM fan that scales in speed from 800-2400RPM with compatible motherboards. At its fastest speed the fan is moderately audible. Pulse Width Modulation (PWM) compatible fans are noted by their 4-pin power connectors, and what PWM does is enable the BIOS to directly control fan speed so the PC keeps itself cool under load, yet decreases fan noise when it isn't."