Fujitsu Primergy RX4770 M1 Upgrade And Maintenance Manual page 238

Processors
Figure 136: Attaching the protective socket cover (A)
Ê Carefully lower the protective socket cover onto the CPU socket in a vertical
motion until it snaps in place.
V
CAUTION!
Always replace the socket cover if you remove the processor from the
socket!
238 Upgrade and Maintenance Manual
RX4770 M1