Lenovo ThinkServer RD340, User And Maintenance Manual

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• When you install memory modules with different frequencies 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.
Figure 41. CPU1 DIMMs
Table 4. Memory module installation rules for servers with one microprocessor
CPU1 DIMM A1 A2 B1 B2 C1 C2
One DIMM X
Two DIMMs X X
Three DIMMs X X X
Four DIMMs X X X X
Six DIMMs X X X X X X
The following table explains the memory module installation rules for servers that have two microprocessors
(CPU1 and CPU2) installed. The “X” mark indicates the memory slots into which the memory modules
should be installed in different situations.
Notes:
• 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 you install 1.35 V memory modules and 1.50 V memory modules into the memory slots for the
same microprocessor, all the memory modules run at 1.50 V.
• When you install memory modules with different frequencies 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.
Chapter 6
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Installing, removing, or replacing hardware
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