Chapter 1 Hardware Installation
23
Step 6 Attach Cables,
Continued
Calculating Power Requirements
The power requirements are unique for each system. Power
requirements depend on the system configuration.
An additional 8A on +5V is required for each Pentium Pro CPU that is
installed. If both Pentium Pro CPUs are installed on the MegaPro
motherboard, the CPUs alone require 16 A on +5V. Add the power
required by each adapter card that is installed. Check the power
requirements in the electrical specification for each adapter card.
Determine the power required by every drive in the system. Use at least
a 400 watt power supply, which should have built–in filters to suppress
radiated emissions.
Important
Use at least a 400 watt power supply to guarantee
reliable operation.
Connect Power Supply
The power supply should match the physical configuration of the
chassis. Make sure the power switch is off before assembly.
Before attaching all components, make sure the proper voltage has been
selected. Power supplies often can run on a wide range of voltages and
must be set usually via a switch to the proper range.
Cont’d
