Fujitsu PRIMERGY TX2550 M5 Upgrade And Maintenance Manual page 416

Processor (CPU)
A
Figure 269: Installing the CPU frame on the heat sink (A)
▶ Place the CPU frame onto the heat sink.
Ensure that the triangle marks on heat sink (A) and on CPU frame (B) are
on the same edge.
416 Upgrade and Maintenance Manual
B
TX2550 M5