Replacing Memory Dimms; Dimm Population Rules And Memory Performance Guidelines; Dimm Slot Numbering; Dimm Population Rules - Cisco UCS C240 M5 Installation And Service Manual

Replacing Memory DIMMs

Replacing Memory DIMMs
DIMMs and their sockets are fragile and must be handled with care to avoid damage during installation.
Caution
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 DIMMs.

DIMM Population Rules and Memory Performance Guidelines

This topic describes the rules and guidelines for maximum memory performance.

DIMM Slot Numbering

The following figure shows the numbering of the DIMM slots on the motherboard.
Figure 28: DIMM Slot Numbering

DIMM Population Rules

Observe the following guidelines when installing or replacing DIMMs for maximum performance:
• Each CPU supports six memory channels.
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◦ CPU 1 supports channels A, B, C, D, E, F.
◦ CPU 2 supports channels G, H, J, K, L, M.
Maintaining the Server