220-801 · Question #83
A technician is testing the voltages of connectors on the motherboard. Which of the following connectors would give a reading of 12V?
The correct answer is B. Molex. A Molex power connector provides three voltage rails: +12V, +5V, and ground. It is classically used for older drives and case fans, and the 12V rail is one of its defining characteristics. USB ports on a motherboard supply +5V. SATA power connectors supply 3.3V, 5V, and 12V…
Question
A technician is testing the voltages of connectors on the motherboard. Which of the following connectors would give a reading of 12V?
Options
- AUSB
- BMolex
- CSATA
- DIEEE 1394
How the community answered
(54 responses)- A2% (1)
- B93% (50)
- C4% (2)
- D2% (1)
Explanation
A Molex power connector provides three voltage rails: +12V, +5V, and ground. It is classically used for older drives and case fans, and the 12V rail is one of its defining characteristics. USB ports on a motherboard supply +5V. SATA power connectors supply 3.3V, 5V, and 12V, but in A+ exam context the Molex is the canonical 12V connector being tested. IEEE 1394 (FireWire) bus-powered ports supply 8–30V from the device, not a fixed 12V rail from the motherboard connector. Molex is therefore the expected answer for a 12V reading.
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