Fujitsu PRIMERGY CX120 S1 Service Supplement Manual page 54

Replacing the processor
Figure 41: Removing the heat sink (B)
Ê Lift the heat sink out of the chassis.
I
Due to the adhesive quality of the thermal paste located between the
heat sink and processor, it may be necessary to turn the heat sink
back and forth to detach the it from the processor.
Ê Thoroughly clean residual thermal paste from the surface of the heat sink
using a lint-free cloth.
52 Service Supplement
PRIMERGY CX120 S1