"The Zalman CNPS9900 LED heatsink was appropriately set to release in tandem with socket 1366 Intel Core i7 processors and is thus fully socket 775/1366 compatible. Like most Zalman heatsinks, the CNPS9900 LED is pretty unique. It is based on a double 'fan' design, but with its 120mm PWM fan floating between the two radial copper fins arrays than in front of them. "