Cisco N2XX-AQPCI03 Datasheet download pdf (Page 48)

Cisco UCS C210 M2 General-Purpose Rack-Mount Server

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

Table 26 on page 49 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.

Low-Voltage DIMM Considerations

The C210 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.

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Cisco N2XX-AQPCI03 Datasheet Page 48