HPE ProLiant DL380 Gen11 User Manual page 85

7. Do one of the following:
For systems without max-performance heatsinks, install the DIMM.
For systems with max-performance heatsinks, position the DIMM under the heatsink wing and then install the DIMM.
CAUTION: To reduce the risk of personal injury from hot surfaces, allow the heatsink to cool for at least 5 minutes CAUTION:
before touching it.
HPE ProLiant DL380 Gen11 Server User Guide 85