Lenovo ThinkServer RD550 User Manual
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For more information about the memory modules in your specific server model, use the Setup Utility
program. See “Viewing information in the Setup Utility program” on page 49.
For a list of the supported ThinkServer memory module options, go to:
Before installing a memory module, ensure that you observe the following guidelines:
• All memory modules to be installed on a server must be the same type.
• When you install memory modules with different ranks in one channel, start from the farthest memory slot
in the channel and install the memory module that has the most ranks first.
• When memory modules with different frequencies are installed into the memory slots for the same
microprocessor, all the memory modules run at the lowest frequency.
• It is recommended that you install the high-frequency memory modules into the memory slots for the
same microprocessor to ensure high performance.
The following illustration shows the memory module installation rules for servers that have only one
microprocessor (CPU1) installed.
Figure 35. Memory module installation rules
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