Asus AP140R - Manual (Page 20)

20 Chapter 2: Hardware Setup
2.3 Installing the 1U Heatsink
CPU Heatsink
The 1U server comes with a specially designed heatsink as shown here.
The heatsink has four screws to secure it to the server chassis underneath
the motherboard.
Install the Heatsink
Place the heatsink on top of the
installed CPU matching the four
screws to the holes around the
socket. To secure the heatsink,
tighten each screw a little at a time
in a circle so that the heatsink will
rest on the CPU evenly.
The CPU heatsink must be installed to prevent damaging
the CPU and motherboard.
IMPORTANT
Connect the Fan Cable
From the factory, the CPU fan cable
is already connected to the 3-pin fan
connector on the motherboard
marked CPU_FAN.
CPU Fan Connector