Replacing Dimms; Dimm Performance Guidelines And Population Rules - Cisco UCS C420 Installation And Service Manual

Chapter 3 Maintaining the Server

Replacing DIMMs

This section includes the following topics:
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Caution DIMMs and their sockets are fragile and must be handled with care to avoid damage during installation.
Caution Cisco does not support third-party DIMMs. Using non-Cisco DIMMs in the server might result in system
problems or damage to the motherboard.
To ensure the best server performance, it is important that you are familiar with memory performance
Note
guidelines and population rules before you install or replace the memory.

DIMM Performance Guidelines and Population Rules

This section describes the type of memory that the server requires and its effect on performance. The
section includes the following topics:
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OL-27640-01
DIMM Performance Guidelines and Population Rules, page 3-21
DIMM Replacement Procedure, page 3-26
DIMM Sockets, page 3-22
DIMM Population Rules, page 3-23
Memory Mirroring Mode, page 3-25
Lockstep Channel Mode, page 3-25
Installing or Replacing Server Components
Cisco UCS C420 Server Installation and Service Guide
3-21