Fujitsu PRIMERGY CX2550 M6 Upgrade And Maintenance Manual page 180

Processor (CPU)
Installing the heat sink
Figure 111: Removing the heat sink from the protective cover
▶ If applicable, remove the heat sink from the protective cover.
▶ If using a heat sink again, clean residual thermal paste from the heat sink
surface using a lint-free cloth.
180 Upgrade and Maintenance Manual