Cisco Systems C200, R2001120402, UCS C200 M1 Memory Population Rules

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Cisco UCS C200 Server Installation and Service Guide

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Chapter 3 Maintaining the Server

Installing or Replacing Components

Figure 3-16 Physical Representation of Banks and Channels

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, speed, and size. Do not mix different size

DIMMs or DIMMs with different clock rates in the same server. Doing so causes the system to set

the memory system speed to that of the slowest installed DIMMs.

•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.

•(Generation M2 only) 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 (Generation M2 Only),

page 3-25.

Note Low voltage DIMMs are supported in Generation M2 servers only.

F1 F2 E1 E2 D1 D2 A2 A1 B2 B1 C2 C1

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