Fujitsu PRIMERGY TX1310 M5 Upgrade And Maintenance Manual page 147

Processor (CPU)
Figure 92: Installing the heat sink (B)
▶ Fasten the four captive screws on the heat sink in a crossover pattern
(screw torque: 0.6 Nm, not applicable for Japan) (1-4).
Figure 93: Installing the heat sink (C)
▶ Connect the CPU fan cable to system board connector "Fan (CPU)".
TX1310 M5 Upgrade and Maintenance Manual 147