Service manual

1-6 AlphaServer GS80/160/320 Service Manual
1.3 GS160/320 System Box
A system box contains two QBBs back to back.
Figure 1– 3 System Box (rear view)
PK1506
Power
Connectors
I/O Risers
Memory 0
CPU 1
Memory 2
CPU 3
Directory
Global Port - Odd
(Connected to front QBB)
Auxiliary
Power
Main
Power
PSM
CPU 0
Memory 1
CPU 2
Memory 3
Clock Splitter
Global Port - Even
(Connected to rear QBB)