• #1 flat-head screwdriver—Supplied with replacement CPU.
• CPU assembly tool—Supplied with replacement CPU. Orderable separately as Cisco PID UCS-CPUAT=.
• Heatsink cleaning kit—Supplied with replacement CPU. Orderable separately as Cisco PID
UCSX-HSCK=.
• Thermal interface material (TIM)—Syringe supplied with replacement CPU. Use only if you are reusing
your existing heatsink (new heatsinks have a pre-applied pad of TIM). Orderable separately as Cisco
PID UCS-CPU-TIM=.
See also Additional CPU-Related Parts to Order with RMA Replacement CPUs, on page 53.
Replacing a CPU and Heatsink
CPUs and their sockets are fragile and must be handled with extreme care to avoid damaging pins. The CPUs
must be installed with heatsinks and thermal interface material to ensure cooling. Failure to install a CPU
correctly might result in damage to the server.
Caution
Step 1 Remove the existing CPU/heatsink assembly from the server:
a) Shut down and remove power from the server as described in Shutting Down and Removing Power From the Server,
on page 29.
b) Slide the server out the front of the rack far enough so that you can remove the top cover. You might have to detach
cables from the rear panel to provide clearance.
If you cannot safely view and access the component, remove the server from the rack.
Caution
c) Remove the top cover from the server as described in Removing the Server Top Cover, on page 30.
d) Use the T-30 Torx driver that is supplied with the replacement CPU to loosen the four captive nuts that secure the
assembly to the motherboard standoffs.
Alternate loosening the heatsink nuts evenly so that the heatsink remains level as it is raised. Loosen the
heatsink nuts in the order shown on the heatsink label: 4, 3, 2, 1.
Note
e) Lift straight up on the CPU/heatsink assembly and set it heatsink-down on an antistatic surface.
Cisco APIC M3/L3 Server Installation and Service Guide
47
Maintaining the Server
Replacing a CPU and Heatsink
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