Removing and Installing CPUs and Heatsinks
CPU Configuration Rules
This server has two CPU sockets on the motherboard. Each CPU supports six DIMM channels (12 DIMM
slots). See DIMMs and Channels, on page 37.
•
The server can operate with one CPU or two identical CPUs installed.
•
The minimum configuration is at least CPU 1 installed. Install CPU 1 first, and then CPU 2.
The following restrictions apply when using a single-CPU configuration:
◦
The maximum number of DIMMs is 12 (only CPU 1 channels A, B, C, D, E, F).
◦
The rear mezzanine slot is unavailable.
•
The maximum combined memory allowed in the 12 DIMM slots is 768 GB. To populate the 12 DIMM
slots with more than 768 GB of combined memory, you need to use a CPU with a SKU that ends with
an "M", for example, UCS-CPU-6134M.
Tools Required for CPU Replacement
You need the following tools and equipment for this procedure:
• T-30 Torx driver—Supplied with replacement CPU.
• #1 flat-head screwdriver—Supplied with replacement CPU.
• CPU assembly tool—Supplied with replacement CPU. Can be ordered separately as Cisco PID
UCS-CPUAT=.
• Heatsink cleaning kit—Supplied with replacement CPU. Can be ordered separately as Cisco PID
UCSX-HSCK=.
• Thermal interface material (TIM)—Syringe supplied with replacement CPU. Use only if you are reusing
your existing heatsink (new heatsinks have pre-applied TIM). Can be ordered separately as Cisco PID
UCS-CPU-TIM=.
Replacing a CPU and Heatsink
CPUs and their sockets are fragile and must be handled with extreme care to avoid damaging pins. The
CPUs must be installed with heatsinks and thermal interface material to ensure cooling. Failure to install
a CPU correctly might result in damage to the server.
Caution
Cisco UCS B200 M5 Blade Server Installation and Service Note
28
Servicing a Blade Server
Removing and Installing CPUs and Heatsinks
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