Examkin

Question

Difficulty: MediumMotherboards Form Factors and Connectors

A technician is installing a new motherboard and connecting cables from the power supply unit. Which TWO of the following motherboard connectors must be connected directly to the power supply to provide primary system board power and dedicated auxiliary processor power? (Select TWO.)

  1. 24-pin ATX main power connectorAnswer
  2. 8-pin EPS12V power connectorAnswer
  3. C
    Front panel system header power switch pins
  4. D
    7-pin SATA data connector

Answer

The 24-pin ATX main power connector and the 8-pin EPS12V power connector must both be connected from the power supply unit to the motherboard.
The 24-pin ATX main power connector provides primary power to the motherboard logic board and integrated circuits, while the 8-pin EPS12V connector provides dedicated +12V power to the processor VRMs.

Step-by-Step Solution

1
Identify the connector responsible for delivering core motherboard and onboard component power.
The 24-pin ATX main power connector supplies main logic power voltages (+3.3V, +5V, +12V) to the motherboard.
Without the main 24-pin connector, the motherboard chipset and expansion buses cannot receive main power.
2
Identify the connector responsible for delivering dedicated power to the processor.
The 8-pin EPS12V (or 4-pin ATX12V) connector delivers auxiliary +12V power directly to the processor's VRMs.
Modern CPUs draw high currents that exceed what the 24-pin main connector can safely supply alone.

Key Concept

Motherboard Power Connectors (24-pin ATX and 8-pin EPS12V)
Rate this question

Topics

Motherboards Form Factors and Connectors

More questions from this topic