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Tip: Be careful when removing or installed the SMP Expansion Modules, because you may damage the center plane. See tip H176162 for details:
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SMP Expansion |
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Module cover |
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| for DIMM access |
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| Connects to | DIMM sockets |
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| center plane | |
Locking |
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| this side |
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levers |
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| CPU 1 |
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| Handle | CPU 3 |
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| XceL4 cache |
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| CPU 4 |
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| CPU 2 |
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| VRM |
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Figure 1-10 SMP Expansion Module
Each SMP Expansion Module also contains 16 DIMM slots to take the memory up to a maximum of 64 GB per node (using 2 GB DIMMs) and an additional 32 MB of Level 4 system cache for a maximum of 64 MB per node.
When two SMP Expansion Modules are installed, they are connected together using two 3.2 GBps SMP Expansion Ports (also known as scalability ports). Using two connections improves throughput beyond that of one connection and provides load balancing. The third scalability port is not used in this
Each SMP Expansion Module is also equipped with the following LEDs for Light Path Diagnostics:
Each DIMM
Each CPU
Each VRM
SMP Expansion Module board