User`s guide

Installing Memory

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Figure 5-8 Memory Block Diagram

Memory DIMM Rules

Use the following rules when installing memory DIMMs:

The minimum memory allowed on SGI Rackable C2108-TY10 cluster nodes is defined by

whether or not the compute nodes are diskless:

• Diskless compute nodes: 8GB per node memory minimum

• Diskful compute nodes: 4GB per node memory minimum

Memory DIMM Rules

• Populate the DIMMs in the furthest slot from the processor for channel 1, first. Then

channels 2 - 3.

• A minimum of one DIMM per processor must always be present - one for each processor.

• 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. The total number of ranks would be three - an odd number

Nehalem-EP

Memory

Channel 1

Memory

Channel 2

Memory

Channel 3

lot C

lot B

lot A