Inspur NF5260FM6 User Manual page 35

Figure 5-2 Installing the heat dissipation module
c. Install the assembled heat dissipation module vertically on the CPU base,
and make sure that the position of the numeral 1 on the heat dissipation
module label corresponds to the triangle mark on the CPU base of the
mainboard. Then tighten the screws in a sequence of labels 1, 2, 3 and 4.
Figure 5-3 Tightening the screws
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