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Cisco UCS C200 M2 High-Density SFF Drive Rack-Mount Server
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SUPPLEMENTAL MATERIAL
Memory Population Rules 
When considering the memory configuration of your server, you should consider the following items: 
DIMMs within the server should all be the same type and speed. If you mix different DIMM 
types or DIMMs with different clock rates in the same server, such configurations are 
supported; however, these configurations may cause the system to operate at less than 
optimum levels. See 
 for recommended DIMM combinations.
DIMMs can be used either in a one DIMM per Channel (1DPC) configuration or in a two DIMMs 
per Channel (2DPC) configuration. 
There are blue and black DIMM slots. Populate blue slots in a bank first. 
Low-voltage (1.35 V) DIMM and standard-voltage DIMM (1.5 V) can be mixed in the same 
server. Note that this causes the system BIOS to default to standard-voltage operation 
(Performance Mode). See 
Low-Voltage DIMM Considerations
The C200 M2 server can be ordered with low-voltage (1.35 V) DIMMs or standard-voltage (1.5 V) DIMMs. Note 
the following considerations: 
Low-voltage DIMMs within the server must have the identical manufacturer, type, speed, 
and size. 
Low-voltage DIMMs and standard-voltage DIMMs can be mixed in the same server. Note that 
this causes the system BIOS to default to standard-voltage operation (Performance Mode). 
That is, the server cannot operate in Power Saving Mode unless all DIMMs are low-voltage 
DIMMs.
CPUs that have a maximum memory frequency less than 1333 MHz support low-voltage 
DIMMs operating in Power Saving Mode only, and do not support Performance Mode.