Silicon Graphics Altix XE250, Руководство пользователя

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Install Memory
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Memory DIMM Rules
Use the following rules when installing memory DIMMs:
• A minimum of two DIMMs must always be present.
• DIMMs within pairs must be identical in:
• Size (1, 2, or 4 GB)
• Speed (667 or 800 Mtransfer/sec)
• Organization (x4 or x8 bit)
• DIMMs do not need to be identical between DIMM pairs. DIMM pair 1A/2A can be
different from DIMM pair 3A/4A in size, speed and organization.
Note: The memory controller hub automatically adjusts to the lowest speed DIMM of the DIMM
pair.
• When configuring the memory for maximum performance, it is critical that the memory
DIMM capacity is balanced across both memory branches (refer to
Figure 3-9 ).
The MCH memory controller has two memory branches: Branch 0 and Branch 1. DIMMs 1A, 2A,
1B, and 2B are on branch 0 and DIMMs 3A, 4A, 3B, and 4B are on branch 1. If the total capacity
of the memory DIMMs on each branch are not balanced, memory performance is degraded.
• Install DIMMs with the same capacity in the following order:
• 2 DIMMs - Install DIMM pair 1
• 4 DIMMs - Install DIMM pair 1 and 2
• 8 DIMMs - Install DIMM pair 1, 2, 3, and 4
• 12 DIMMs - Install DIMM pairs 1, 2, 3, 4, 5, and 6
• 16 DIMMs - All DIMM slots filled