Processor Mounting Rule - NEC Express5800/A1080a User Manual

Express5800 series

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Processor Mounting Rule

 It is required to embed processors for processor memory modules.

 It is required to that processor memory modules are mounted in a server, connected to IOH#1

or -IOH#3 having Management Module (MGM) that controls server configuration, handles

failures, etc.

 With A1080a-S model, 1, 2, 3, and 4 processors can be embedded to the server 1.

 With A1080a-D model, 1, 2, 3, and 4 processors can be embedded both to the server 1 and 2.

 With A1080a-E model, 8 processors can be embedded to a server.

The following shows the connection of processor memory modules (PMMs) for A1080a-S model.

All processor memory modules can be connected one another. Some I/O controllers (IOHs)

cannot be connected to processor memory modules directly, but can be connected via other

processor modules.

For A1080a-S

Connected PMM

PMM #2,PMM #3,PMM #4

PMM #1,PMM #3,PMM #4

PMM #1,PMM #2,PMM #4

PMM #1,PMM #2,PMM #3

Example) In the four-processor memory module configuration, PMM1 and IOH2 cannot be

connected directly as shown below. However, a PCI card under IOH2 can be used via

PMM2 or PMM4.

For example, the PCI card under IOH2 can be used via PMM4 even in the case of

failure on PMM2.

* PMMx is an abbreviation of a processor memory module.

* IOHx is an abbreviation of an I/O hub.

* ICH is an abbreviation of an I/O control hub.

Connected IOH (next connection

IOH #1 (MGM #1/PCI #1,2,3,4)

IOH #2 (PCI #5,6,7)

IOH #1 (MGM #1/PCI #1,2,3,4)

IOH #2 (PCI #5,6,7)