220-801 · Question #229
220-801 Question #229: Real Exam Question with Answer & Explanation
The correct answer is C: 2-pin and 3-pin. Motherboard fan headers commonly come in 2-pin and 3-pin configurations. A 2-pin connector provides only power (12V and ground), offering no speed feedback or control. A 3-pin connector adds a tachometer signal wire, allowing the motherboard to monitor fan RPM. (Modern boards als
Question
Options
- A1-pin and 2-pin
- B1-pin and 3-pin
- C2-pin and 3-pin
- D2-pin and 5-pin
Explanation
Motherboard fan headers commonly come in 2-pin and 3-pin configurations. A 2-pin connector provides only power (12V and ground), offering no speed feedback or control. A 3-pin connector adds a tachometer signal wire, allowing the motherboard to monitor fan RPM. (Modern boards also use 4-pin PWM headers for full speed control, but the foundational sizes are 2-pin and 3-pin.) The other options (1-pin, 4-pin in isolation, 5-pin) do not represent standard fan header sizes found on motherboards in this context.
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