HP ProLiant SL250s Gen8 User Manual page 38

Press and hold the processor retaining bracket in place, and then close each processor locking lever.
13.
Press only in the area indicated on the processor retaining bracket.
Remove the thermal interface protective cover from the heatsink.
14.
CAUTION: Heatsinks specified for processor 1 and 2 are not interchangeable. Be sure to note
the appropriate orientation on the heatsink label.
CAUTION: Heatsink retaining screws should be tightened or loosened in diagonally opposite
pairs (in an "X" pattern). Do not overtighten the screws as this can damage the board, connectors,
or screws. Use the wrench supplied with the system to reduce the possibility of overtightening the
screws.
Install the heatsink:
15.
Hardware options installation 38