Memory Dimm Layout; Memory Dimm Rules - Silicon Graphics Rackable H2106-G7 System User's Manual

Memory DIMM Layout

Memory DIMM Rules

007-5683-004
Table 5-2 32-DIMM Configuration (8 per CPU)
#DIMMs CPU Channel 1
32 DIMMs CPU1 P1-1A & P1-1B
CPU2 P2-1A & P2-1B
CPU3 P3-1A & P3-1B
CPU4 P4-1A & P4-1B
The H2106-G7 memory bus is a quad-channel controller intended for use with four processor
configurations. Note that memory DIMM slots should be populated equally in adjacent memory
banks on each channel.
Use the following rules when installing memory DIMMs:
The minimum memory recommended on the system is 16 GB.
• Populate the DIMMs in groups of four or eight per CPU as described in
page 38 and Table 5-2 on page
• A minimum of four DIMMs per processor must always be present.
• Mixing DIMM Sizes - When mixing DIMMs on a channel that has a mixed number of ranks,
it is recommended to have the total number of ranks on the channel be even to avoid
bandwidth degradation. Example: placing a single-rank DIMM and a dual-rank DIMM on
the same channel is not desirable.
• For maximum memory performance the DIMMs within a node must be identical in:
– Speed (for example - 1600 Mtransfer/sec)
– Number of ranks (1 or 2)
Channel 2 Channel 3
P1-2A & P1-2B P1-3A & P1-3B
P2-2A & P2-2B P2-3A & P2-3B
P3-2A & P3-2B P3-3A & P3-3B
P4-2A & P4-2B P4-3A & P3-3B
39.
Installing Memory
Channel 4
P1-4A & P1-4B
P2-4A & P2-4B
P3-4A & P3-4B
P4-4A & P4-4B
Table 5-1 on
39