System Box Architecture; System Box Block Diagram (16-Processor System) - Compaq AlphaServer 160 User Manual

2.2

System Box Architecture

The system box houses two quad building blocks (QBBs). Each QBB
has a backplane with a switch interconnect that supports up to four
CPU modules, four memory modules, two power modules, two I/O riser
modules, and a global port. Figure 2–2 shows two system boxes
connected by the hierarchical switch. Figure 2–3 shows one system box
and the distribution board.
Figure 2–2 System Box Block Diagram (16-Processor System)
Modem
PCI Box
Standard
I/O SCM
Operator
PCI Box
Console
PCI Box
PCI Box
PCI Box
PCI Box
PCI Box
PCI Box
2-4 AlphaServer GS80/160/320 User's Guide
System Box 1
CPU CPU CPU CPU
I/O Switch GP
MEM MEM MEM MEM
CPU CPU CPU CPU
I/O Switch GP
MEM MEM MEM MEM
System Box 2
CPU CPU CPU CPU
I/O Switch GP
MEM MEM MEM MEM
CPU CPU CPU CPU
I/O Switch GP
MEM MEM MEM MEM
Hierarchical
Switch
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