Replacing Dimms; Memory Performance Guidelines And Population Rules - Cisco UCS C220 M4 Installation And Service Manual

Installing or Replacing Server Components

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.
Cisco does not support third-party DIMMs. Using non-Cisco DIMMs in the server might result in system
Caution
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 DIMMs.

Memory 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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DIMM Slot Numbering
Figure 3-12
Figure 3-12
Cisco UCS C220 M4 Server Installation and Service Guide
3-18
Memory Performance Guidelines and Population Rules, page 3-18
DIMM Replacement Procedure, page 3-21
DIMM Slot Numbering, page 3-18
DIMM Population Rules, page 3-19
Memory Mirroring and RAS, page 3-20
Lockstep Channel Mode, page 3-20
shows the numbering of the DIMM slots.
DIMM Slots and CPUs
CPU 2
Front of Server
Chapter 3 Maintaining the Server
CPU 1
OL-32473-01