Silicon Graphics Rackable C2112-4G3, Руководство пользователя

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Installing Memory
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Memory DIMM Functionality Guidelines
Use the following guidelines when installing memory DIMMs:
The minimum memory recommended on the system is 8 GB.
• Populate the DIMMs in groups of four or eight per CPU as described in Table 5-1 on
page 35 and Table 5-2 on page 37 .
• A minimum of one DIMM per processor must always be present for the system to function.
• Mixing DIMM Sizes - When mixing DIMMs on a processor that has a mixed number of
ranks, it is recommended to have the total number of ranks on each channel be the same to
avoid bandwidth degradation. Example: placing a single-rank DIMM and a dual-rank
DIMM on the same channel is not desirable.
Note: The speed of the memory controller will reduce to the lowest speed DIMM on the channel.
Two conditions must be met to have a memory speed of 1333 MT/s:
• The processor must be capable of supporting 1333 MT/s
• The DIMM must be capable of running at 1333 MT/s
See the section “Configuring DIMM Memory for Best Performance” for additional
processor/memory combination performance tips.
Configuring DIMM Memory for Best Performance
In addition to the rules listed in the previous subsection ( “Memory DIMM Functionality
Guidelines” ), use the following guidelines to maximize processor/DIMM performance:
• For maximum memory performance, the DIMMs on a processor must be identical in:
– Speed (1066 or 1333 MT/sec)
– Number of ranks (1 or 2) - use of quad-rank DIMMs will reduce overall performance
• When configuring the memory for maximum performance, it is critical that the memory
DIMM capacity, speed and rank configuration is balanced across all memory channels.