Cisco UCS C220 M4 Maintaining The Server page 33

Chapter 3 Maintaining the Server
CPU Configuration Rules
This server has two CPU sockets. Each CPU supports four DIMM channels (12 DIMM slots). See
Figure
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•
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CPU Replacement Procedure
CPUs and their motherboard sockets are fragile and must be handled with care to avoid damaging pins
Caution
during installation. The CPUs must be installed with heatsinks and their thermal pads to ensure proper
cooling. Failure to install a CPU correctly might result in damage to the server.
Note This server uses the new independent loading mechanism (ILM) CPU sockets, so no Pick-and-Place
tools are required for CPU handling or installation. Always grasp the plastic frame on the CPU when
handling.
Power off the server as described in
Step 1
Step 2 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
Remove the top cover as described in
Step 3
Remove the plastic air baffle that sits over the CPUs.
Step 4
Remove the heatsink that you are replacing. Use a Number 2 Phillips-head screwdriver to loosen the four
Step 5
captive screws that secure the heatsink and then lift it off of the CPU.
Note
Open the CPU retaining mechanism:
Step 6
a.
b.
OL-32473-01
3-15.
The server can operate with one CPU or two identical CPUs installed.
The minimum configuration is that the server must have at least CPU1 installed. Install CPU1 first,
and then CPU2.
The following restrictions apply when using a single-CPU configuration:
The maximum number of DIMMs is 12 (only CPU1 channels A, B, C, and D).
–
PCIe riser 2/slot 2 is unavailable.
–
Alternate loosening each screw evenly to avoid damaging the heatsink or CPU.
Unclip the first retaining latch labeled with the
latch labeled with the
Open the hinged CPU cover plate.
Shutting Down and Powering Off the Server, page
Removing and Replacing the Server Top Cover, page
icon, and then unclip the second retaining
icon. See Figure 3-16.
Cisco UCS C220 M4 Server Installation and Service Guide
Installing or Replacing Server Components
3-8.
3-9.
3-33