HP 593878-001 - Heat sink - Includes replacement thermal material - For use with 6540b and 6440b models equipped with UMA graphics subsystem memory Retail
HP 456606-001 - Heat sink - Includes replacement thermal material - For use only with computer models equipped with discrete graphics subsystem Retail
HP 535767-001 - Heat sink - For use in models with discrete graphics subsystems - Includes replacement thermal material Retail
HP 746658-001 - Heat sink - For use on models with a graphics subsystem using discrete memory - Includes replacement thermal material Retail
HP 686021-001 - Heat sink - Includes replacement thermal material - For use in models equipped with a discrete memory subsystem Retail
