IBM Mother Board 486F39X, User Manual

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Chapter 1: Introduction
Power Supply for 486F39X Mainboard
A clean steady power source is necessary to get reliable perfor-
mance from the system. With the high clock speeds of the CPU
(running at 25MHz or above) the quality of the power supply
becomes even more important.
Most power supplies in the market
meet the standards required by the CPU, however some have been
found to be out of specification.
To be certain of the highest
performance by your system, be sure your power supply
provides a voltage range of
5.25
volts maximum to
4.95
volts
minimum.
In areas with noisy power transmission, we suggest the use of
a line noise filter between the power and the computer.
486F39X User’s Manual 3