220-1101 Hardware Practice Question

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✗

  Connect the full 8-pin connector to the 4-pin header

  Why it's wrong here

  The 8-pin EPS connector is an integrated, non-splittable housing that is physically wider and keyed with offset notches to fit only an 8-pin CPU power header. Attempting to force it into the motherboard's 4-pin ATX12V header will likely bend or shear the header's socket pins, crack the plastic shroud, and could create an intermittent short on the +12V rail. The keying and clip position are deliberately matched to the 8-pin receptacle, so a 4-pin header cannot accept it without physical damage.

• ✓

  Separate the connector into two 4-pin sections and connect one section to the motherboard

  Why this is correct

  The 4+4 pin CPU power cable is deliberately split into two interlocking 4-pin segments, each carrying two +12V and two ground conductors. By pressing the release latch and firmly separating the two halves, you can plug one half into the motherboard's 4-pin header, leaving the other half unconnected and properly tucked aside. This design maintains backward compatibility: it powers 4-pin CPU headers with one half, while joining both halves together serves 8-pin headers for higher-power processors.

• ✗

  Use a 24-pin to 4-pin adapter

  Why it's wrong here

  The 24-pin main power connector uses a dense pinout that includes +3.3V, +5V, +12V, -12V, 5VSB, and numerous ground returns, none of which align with the CPU-only +12V and ground traces in a 4-pin header. Even if an adapter physically forced a fit, the 24-pin connector's narrow 12V traces are not sized to safely carry the CPU's high current draw, and the motherboard's CPU power header would receive incorrect voltage rails. Unlike the CPU power connector, the 24-pin is also keyed and shaped differently at the housing level, so an adapter cannot make a valid connection.

• ✗

  Leave the CPU power unconnected because the motherboard can draw power from the 24-pin connector

  Why it's wrong here

  The CPU power connector is the sole source of +12V input to the motherboard's voltage regulator modules (VRMs), which convert that 12V down to the low core voltage (VCORE) the processor requires. The 24-pin main connector feeds a completely separate set of distribution rails—chipset, memory, PCIe, and system fans—and does not route CPU-dedicated 12V power. Without the 4-pin EPS connection, the VRMs remain unpowered, so the processor receives no voltage and the system will either fail to POST, stay in a reset loop, or trigger an ATX power-good fault and shut down.

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