Cisco Systems R2001120402 Installing DIMMs, Memory Performance Guidelines and Population Rules

Chapter 3 Maintaining the Server

Installing or Replacing Components

Installing DIMMs

This section includes the following sections:

•Memory Performance Guidelines and Population Rules, page 3-23

•DIMM Installation Procedure, page 3-26

Note To ensure the best server performance, it is important that you are familiar with memory performance guidelines and population rules before you install or replace memory modules.

Memory Performance Guidelines and Population Rules

This section describes the type of memory that the server requires and its effect on performance. The following topics are covered:

•Supported DIMMs, page 3-23

•Banks and Channels, page 3-23

•Memory Population Rules, page 3-24

•Memory Mirroring and RAS, page 3-25

Supported DIMMs

The qualified and supported part numbers for this component are subject to change over time. For the most up-to-date list of replaceable components, see the following URL and then scroll to Technical Specifications:

http://www.cisco.com/en/US/products/ps10493/products_data_sheets_list.html

Note Non-ECC UDIMMs do not support temperature sensors.

Banks and Channels

Each memory channel is identified by a letter—channels A, B, and C for CPU1, and channels D, E, and F for CPU2. See Figure 3-16.

Each memory bank is identified by a number, either 1 or 2. For example DIMM slots A1, B1, and C1 belong to Bank–1, while A2, B2, C2 belong to Bank–2. Note that each slot within Bank 1 is blue, while each slot within Bank 2 is black. See Figure 3-16.

	Cisco UCS C200 Server Installation and Service Guide
OL-20732-02		3-23