Fujitsu PRIMERGY GX2570 M6 Upgrade And Maintenance Manual page 174

Processor (CPU)
Installing the heat sink
▶ 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.
Figure 114: Installing the heat sink on the CPU frame (A)
▶ Ensure that the triangle marks on the heat sink and on CPU frame are on
the same edge (see circles).
174 Upgrade and Maintenance Manual GX2570 M6