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Installing or Replacing Server Components
Replacing CPUs and Heatsinks
This section contains the following topics:
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CPU Configuration Rules
This server has two CPU sockets. Each CPU supports four DIMM channels (12 DIMM sockets). See
Figure
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Replacing a CPU and Heatsink
Caution
CPUs and their motherboard sockets are fragile and must be handled with care to avoid damaging pins
during installation. The CPUs must be installed with heatsinks and their thermal grease 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
Slide the server out the front of the rack far enough so that you can remove the top cover. You might have
Step 2
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
Step 3
Remove the top cover as described in
Remove the plastic air baffle that sits over the CPUs.
Step 4
Remove the heatsink that you are replacing:
Step 5
a.
Note
Cisco UCS C240 M4 Server Installation and Service Guide
3-24
CPU Configuration Rules, page 3-24
Replacing a CPU and Heatsink, page 3-24
Additional CPU-Related Parts to Order with RMA Replacement Motherboards, page 3-27
3-13.
The server can operate with one CPU or with 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).
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PCIe riser 2, which contains PCIe slots 4, 5, and 6 is unavailable.
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Use a Number 2 Phillips-head screwdriver to loosen the four captive screws that secure the heatsink.
Alternate loosening each screw evenly to avoid damaging the heatsink or CPU.
Shutting Down and Powering Off the Server, page
Removing and Replacing the Server Top Cover, page
Chapter 3
Maintaining the Server
3-9.
3-10.
OL-32474-01
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