Tip: Be careful when removing or installed the SMP Expansion Modules, because you may damage the center plane. See tip H176162 for details:

http://www.pc.ibm.com/qtechinfo/MIGR-43675.html

 

SMP Expansion

 

 

 

Module cover

 

See-through hinged doors

 

 

 

for DIMM access

 

 

 

Connects to

DIMM sockets

 

 

center plane

Locking

 

 

 

this side

 

levers

 

 

 

 

 

CPU 1

 

 

Handle

CPU 3

 

 

 

 

 

 

 

XceL4 cache

 

 

 

CPU 4

 

 

CPU 2

 

 

 

VRM

 

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 single-node eight-way configuration.

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

18 IBM ^xSeries 440 Planning and Installation Guide

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Image 32
IBM 440 manual SMP Expansion Module