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Chapter Overview
Power Supplies
Power Supply Problems
1
Overview of Power Supplies
The standard power supply Converts AC to DC
“Conditions” power by evening out fluctuations Requires a fan
Standard power in U.S. is 110 volts alternating current (VAC) oscillating at 60 hertz (Hz).
You must consider physical size, wattage, and connector types when replacing a power supply.
2
Power Supply Sizes
Power supply sizes are based on the type of case and motherboard connections.
The ATstyle is found on older computers and earlier Pentium systems.
The ATXstyle (current technology) is found on Pentium II and later systems.
You should compare the existing power supply with the new one before replacing it.
3
Power Supply Wattage
A watt is a unit of electrical power equivalent to one voltampere.
Total wattage needs are determined by adding the power required for each device, plus more power for startup.
Generaluse computers require 130–205 watts.
Servers and highperformance workstations require 350–500 watts.
4
Power Supply Connectors
5
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