Practice Quiz

CompTIA A+ 220-901

Category - Hardware

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You are searching for a new power supply for an ATX motherboard. On the power connector, what voltage would a red pin indicate?
  1. +3.3V
  2. +12V
  3. +5V
  4. +3V
Explanation
Answer: C - A red pin on an ATX power connector indicates a 5V signal

Key Takeaway - The ATX form factor calls for the power supply to produce +3.3 V (orange pins), +5 V (red pins), +12 V (yellow pins), -12 V (blue pins), and a 5 V standby (purple pins). This is generally provided through a 20-pin power connector, labeled P1.
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