Cisco Systems UCS C200 M1, R2001120402 manual Memory Population Rules

Chapter 3 Maintaining the Server

Installing or Replacing Components

Figure 3-16 Physical Representation of Banks and Channels

Rear of Server

CPU 2

CPU 1

F1 F2 E1 E2 D1 D2

Front of Server

Memory Population Rules

A2 A1 B2 B1 C2 C1

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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.

	Cisco UCS C200 Server Installation and Service Guide
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