Question about Computers & Internet
Input voltage into the Power Supply of the computer is AC Voltage.
100, or 120, or 220, or 240 Volts; depending on what country you are in.
Output voltage coming out of the Power Supply is divided, into three main power rails;
A) 3.3 Volt
B) 5 Volt
C) 12 Volt
ALL are DC Voltage.
In comparison two D cell batteries store 3 Volts DC.
The Power Supply in your computer converts dangerous high AC Voltage, into three low DC voltages.
AC voltage is rectified into DC voltage.
The dangerous voltages are contained in the metal case, of the Power Supply.
Current = Amperage.
Current is measured in Amperage.
To know the rated current of each Voltage power rail, look at the chart on the Power Supply's case.
Across the top usually are listed the voltage power rails.
Look down from 3.3V+, 5V+, and 12V+
Forget about the Negative values; 3.3V-, 5V-, and 12V-
If more than one 12 Volt power rail is listed, ADD all 12 Volt power rail Amperage together.
12V1 - 20A
12V2 - 22A
42 Amp's on the 12 Volt power rail.
Add all power rails amperage together, (3.3V+, 5V+, 12V+), and multiply times the input voltage, to come up with the actual rated maximum Wattage.
For additional questions please post in a Comment.
Posted on Nov 06, 2012
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Posted on Jan 02, 2017
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