Cisco UCS C200 M2 - Page 15

Cisco UCS C200 M2 High-Density SFF Drive Rack-Mount Server
CONFIGURING the SERVER
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channels with two DIMMS per channel (you cannot implement RAS on three channels). In
this case, two DIMMS would go unused.
For more information regarding memory, see CPUs and DIMMs, page 45.
NOTE: For memory mirroring, DIMM pairing across buses must be identical.
If you only have two DIMMs, they need to be the same PID because you have
one DIMM on each of two buses.
If you have four DIMMs in a 2-CPU system, for example, you can have two
4-GB and two 8-GB DIMMs. One 4-GB/8-GB DIMM pair would located on
Channel A of CPU 1, and one 4-GB/8-GB DIMM pair would be located on
Channel D of CPU 2.
If you have four DIMMs in a 1-CPU system, for example, you can have two
4-GB and two 8-GB DIMMs. One 4-GB/8-GB DIMM pair would located on
Channel A of CPU 1, and one 4-GB/8-GB DIMM pair would be located on
Channel B of CPU 1.