HPE ProLiant DL385 Gen11 Maintenance And Service Manual page 219

Max performance heatsink
12. Place the heatsink on a flat work surface with its contact side facing up.
Installing the heatsink Installing the heatsink
Prerequisites Prerequisites
Before you perform this procedure, make sure that you have the following items available:
T-20 Torx screwdriver or a torque screwdriver with T-20 drill bit
HPE ProLiant DL385 Gen11 Server Maintenance and Service Guide 219