Chapter 3 Maintaining the Server
Installing or Replacing Components
Installing CPUs and Heatsinks
The qualified and supported part numbers for this component are subject to change over time. For the most
http://www.cisco.com/en/US/products/ps10493/products_data_sheets_list.html
To install or replace a CPU and heatsink, follow these steps:
Step 1 Remove an existing CPU and heatsink:
a.Power off the server as described in the “Shutting Down and Powering Off the Server” section on page
b.Disconnect all power cords from the power supplies.
c.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.
Caution If you cannot safely view and access the component, remove the server from the rack.
d.Remove the top cover as described in the “Removing and Replacing the Server Top Cover” section on page
e.Remove the air baffle that sits over the CPUs and DIMMs and set it aside.
f.Loosen the two captive screws that hold the heatsink to the chassis posts and lift the heatsink out of the server (see Figure
g.If you plan to use this heatsink with your new CPU, clean all of the old thermal compound from the bottom of the heatsink.
h.Unhook the CPU socket latch and open the CPU cover plate.
i.Lift the CPU out of the socket and set it aside on an antistatic mat or in an antistatic bag.
Step 2 Install a CPU and heatsink:
a.Set the new CPU into the socket, being careful to orient the CPU alignment notches with the alignment keys in the socket.
b.Close the CPU cover plate and hook the socket latch back in the locked position.
c.Prepare the thermal compound, which aids heat transference between the CPU and the heatsink:
•If you are installing a new heatsink, a thermal pad comes
•If you are using your existing heatsink, make sure that all of the old thermal compound is removed from the underside of the heatsink. Then apply the full contents of the syringe that is supplied with the new CPU to apply thermal compound to the top of the CPU. Apply the compound as evenly as possible so that it forms an even layer when the heatsink is tightened down.
d.Align the heatsink captive screws with the chassis posts, and then tighten both captive screws evenly.
e.Replace the air baffle and the top cover.
f.Replace the server in the rack, replace power cords and any other cables, and then power on the server by pressing the Power button.
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