220-801 · Question #470
On an ATX motherboard, the 4-pin auxiliary power connector provides which of the following?
The correct answer is D. Additional power to the CPU voltage regulator. The 4-pin ATX12V connector (also called the P4 connector, introduced with the Pentium 4 platform) supplies dedicated 12V power to the CPU voltage regulator circuit on the motherboard. Modern CPUs require more power than the original 20-pin ATX main connector could reliably…
Question
On an ATX motherboard, the 4-pin auxiliary power connector provides which of the following?
Options
- AAdditional power to onboard devices
- BAdditional power to PCIx peripheral cards
- CAdditional power to the South Bridge
- DAdditional power to the CPU voltage regulator
How the community answered
(32 responses)- A3% (1)
- B3% (1)
- C6% (2)
- D88% (28)
Explanation
The 4-pin ATX12V connector (also called the P4 connector, introduced with the Pentium 4 platform) supplies dedicated 12V power to the CPU voltage regulator circuit on the motherboard. Modern CPUs require more power than the original 20-pin ATX main connector could reliably deliver to the CPU area alone. The voltage regulator module (VRM) converts this 12V supply to the lower core voltage the CPU actually uses. On high-end boards, this is often expanded to an 8-pin EPS12V connector for even greater CPU power delivery.
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