Service manual

1-10 AlphaServer GS80/160/320 Service Manual

1.5 GS80 System Drawer

The system drawer QBB is the building block for the smaller system.

The drawer contains a backplane, CPU(s), memory(s), I/O riser(s),

power modules, a power system manager, a clock splitter, and a

directory, if there are two system drawers in the cabinet.

Figure 1– 5 GS80 System Drawer Backplane

PK1534

GPD0

GPA

GPD1

QSD0

QSA

QSD1

QSD2

QSD3

WFJ

IOD0

IOA

IOD1

MCM

Dtag 0-3

MCM

Dtag 4-7

72 3 2 3 4 5 6

8 3 2 3 2 9 10 11