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Cisco UCS C22 Server Installation and Service Guide
OL-26646-01
Chapter3 Maintaining the Server
Installing or Replacing Server Components
c. Apply thermal grease from an included syringe to the top of the CPU.
Apply about 2 cubic centimeters of grease (about half the syringe contents) to the top of the CPU in
the pattern that is shown in Figure3-17.
Note If you do not have a syringe of thermal grease, you can order a spare
(Cisco PID UCS-CPU-GREASE).
Figure3-17 Thermal Grease Application Pattern
d. For a new heatsink, peel the protective film from the thermal pad that is on the bottom of the new
heatsink.
Note Do not apply a syringe of thermal grease if you are installing a new heatsink that already has a
pre-applied thermal pad.
e. Align the heatsink captive screws with the motherboard standoffs, then use a Number 2
Phillips-head screwdriver to tighten the captive screws evenly.
Note Alternate tightening each screw evenly to avoid damaging the heatsink or CPU.
f. Replace the top cover.
g. Replace the server in the rack, replace cables, and then power on the server by pressing the Power
button.
Additional CPU-Related Parts To Order With RMA Replacement Motherboards
When a return material authorization (RMA) of the motherboard or CPU is done on a Cisco UCS
C-series server, there are additional parts that might not be included with the CPU or motherboard spare
bill of materials (BOM). The TAC engineer might need to add the additional parts to the RMA to help
ensure a successful replacement.
•Scenario 1—You are re-using the existing heatsinks:
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