HPE P48818-B21 ProLiant DL380/DL560 Gen11 2U High Performance Heat Sink Kit
Overview
The HPE P48818-B21 is a high-performance heat sink kit engineered for HPE ProLiant DL380 Gen11 and DL560 Gen11 2U rack servers. It is the correct replacement or upgrade path when deploying processors that exceed the thermal envelope supported by the standard heat sink — typically higher-TDP CPUs in dense compute or always-on workloads where sustained core temperatures directly affect clock speeds and component longevity. At 1.75 lb and 11.40 x 9.90 x 4.40 in, this kit is sized for the 2U chassis geometry of the target platforms.
Compatibility
Designed specifically for the HPE ProLiant DL380 Gen11 and DL560 Gen11 2U rack servers. The P48818-B21 is a platform-specific component — do not attempt installation in DL360, DL385, or prior-generation (Gen10/Gen10 Plus) chassis, as socket geometry, mounting points, and airflow pathways differ across generations. Confirm your server's chassis sub-type and CPU TDP requirement against HPE's QuickSpecs before ordering; some Gen11 configurations ship with a standard heat sink that is sufficient for mid-range processors, and the high-performance variant is required only when the installed or planned CPU TDP exceeds the standard sink's rated thermal capacity.
Installation Notes
Installation is a tool-assisted, hot-component procedure — ensure the server is powered down and cooled before handling. The 2U form factor means the heat sink seats into a fixed airflow lane; verify that no obstruction exists in the adjacent fan zone before closing the chassis. Sourced factory-new with no grey-market or parallel-import exposure, ensuring retention clip integrity and thermal interface material are uncompromised out of the box.
