Cisco APIC M3 Installation And Service Manual page 60

Replacing a CPU and Heatsink
Figure 24: Installing the Heatsink/CPU Assembly to the CPU Socket
1 Guide hole in assembly (two)
2 CPU socket alignment post (two)
3 CPU socket leaf spring
c) Set the heatsink with CPU assembly down onto the CPU socket.
d) Use the T-30 Torx driver that is supplied with the replacement CPU to tighten the four captive nuts that secure the
heatsink to the motherboard standoffs.
Caution Alternate tightening the heatsink nuts evenly so that the heatsink remains level while it is lowered. Tighten
the heatsink nuts in the order shown on the heatsink label: 1, 2, 3, 4. The captive nuts must be fully tightened
so that the leaf springs on the CPU socket lie flat.
e) Replace the top cover to the server.
f) Replace the server in the rack, replace cables, and then fully power on the server by pressing the Power button.
Cisco APIC M3/L3 Server Installation and Service Guide
52
4 Angled corner on heatsink (pin 1 alignment
feature)
5 Angled corner on socket (pin 1 alignment
feature)
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Maintaining the Server