Functional Description Of Base System; Base System Components - DEC VAX 4000 300 Manual

NOTE: The fan speed control can be set so that the fans will run at their
maximum speed. This setting is recommended if you want potentially higher
system module reliability, and do not object to the increased fan noise.
Contact your Digital service representative to override the fan speed control.
Figure 1–12: System Air Circulation

1.2 Functional Description of Base System

Each VAX 4000 system includes base system components common to all
systems. Your system may have optional components as well. Your system
was configured at the factory, based on your order.
The following sections describe base system components and options, in
turn.

1.2.1 Base System Components

Base system components include the following:
• Central processing unit (CPU)
• Console serial line unit (SLU)
• Main memory
MLO-004042
System Overview 1–19