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Cisco UCS C420 Server Installation and Service Guide
OL-27640-01
Chapter 3 Maintaining the Server
Installing or Replacing Server Components
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 Figure 3-18.
Note If you do not have a syringe of thermal grease, you can order a spare
(Cisco PID UCS-CPU-GREASE).
Figure 3-18 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
preapplied thermal pad.
e. Align the heatsink captive screws with the motherboard standoffs, and then use a Number 2
Phillips-head screwdriver to tighten the captive screws evenly.
Note Tighten each screw evenly to avoid damaging the heatsink or CPU.
f. Replace the internal air baffle and then the top cover.
g. Replace the server in the rack, replace cables, and then power on the server by pressing the Power
button.
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