HardwareQuestion 5 of 100
Which unit converts wall AC power into the DC voltages a computer's internal components need?
a.The voltage regulator module (VRM)
b.The power supply unit (PSU)
c.The uninterruptible power supply (UPS)
d.The CMOS battery
Explanation
The PSU takes alternating current from the wall outlet and converts it into the direct current voltages such as 3.3V, 5V, and 12V used by internal parts. Choosing a PSU with adequate wattage is important for system stability. A failing PSU can cause random shutdowns or a system that will not power on.
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