System Drawer Architecture; Two-Drawer Block Diagram - Compaq AlphaServer 160 User Manual

4.2

System Drawer Architecture

The system drawer houses a QBB consisting of a backplane that
supports four CPU modules, four memory modules, two power modules
and two I/O riser modules. These modules are identical to those used in
the box systems. The global port is part of the backplane. In a two-
drawer system, the drawers are linked by a distribution board.
Figure 4–2 Two-Drawer Block Diagram
PCI Box
PCI Box
PCI Box
PCI Box
4-4 AlphaServer GS80/160/320 User's Guide
System Drawer 1
CPU CPU CPU
I/O Switch
MEM MEM MEM
System Drawer 2
CPU CPU CPU
I/O Switch
MEM MEM MEM
CPU
GP
MEM
Distribution
Board
CPU
GP
MEM
PK-0630-99