Match each expansion card interface specification or power supply unit (PSU) connector on … — CompTIA A+ (Core 1 & Core 2)

Match each expansion card interface specification or power supply unit (PSU) connector on the left with its correct functional characteristic or operational limit on the right.

EPS12V 8-pin connectorSupplies dedicated $+12\text{ V}$ power directly to the CPU power distribution phase delivery system on the motherboard.
PCIe 6+2 pin auxiliary connectorDelivers up to $150\text{ W}$ of supplementary $+12\text{ V}$ power to high-draw expansion graphics cards.
Mechanical PCIe x16 slot (Electrical x4)Physically accommodates full-length expansion cards while capping data throughput to four PCIe lanes via motherboard trace routing.
PCIe motherboard bus slot standardDelivers up to $75\text{ W}$ of combined DC power directly to an expansion card through motherboard slot pins without auxiliary cables.

Cevap

The EPS12V 8-pin connector pairs with dedicated CPU VRM power; the PCIe 6+2 pin auxiliary connector delivers up to

150\text{ W}

to graphics cards; the mechanical PCIe x16 (electrical x4) slot accommodates full-length cards while capping throughput to 4 data lanes; and the standard PCIe slot delivers up to

75\text{ W}

directly through motherboard pins.

Each connector and expansion slot is paired according to its standard specifications: EPS12V handles dedicated CPU socket power, PCIe 6+2 pin supplies up to

150\text{ W}

auxiliary GPU power, mechanical x16 / electrical x4 slots cap bandwidth to 4 lanes, and standard PCIe bus slots provide up to

75\text{ W}

direct pin power.

Adım Adım Çözüm

Differentiate CPU motherboard power connectors from auxiliary expansion card power connectors.

Identify that the EPS12V 8-pin connector is wired and keyed specifically for processor power phases on the motherboard, whereas PCIe 6+2 connectors are keyed for expansion cards.

Connecting EPS12V cables to GPU auxiliary sockets or vice-versa causes severe hardware damage due to opposing

+12\text{ V}

and Ground pin layouts.

Distinguish power delivery thresholds between motherboard slots and discrete cables.

Note that standard PCIe slots supply up to

75\text{ W}

via slot pins, while an 8-pin (or 6+2 pin) auxiliary PCIe cable supplies up to

150\text{ W}

High-TDP graphics cards require combined wattage from both the motherboard slot (

75\text{ W}

) and one or more auxiliary cables.

Analyze mechanical versus electrical lane allocation constraints on expansion slots.

Recognize that mechanical size determines card physical compatibility, while electrical wiring determines data trace bandwidth.

Motherboard manufacturers route secondary x16 physical slots with fewer electrical lanes (such as x4) to conserve chipset/CPU PCIe lane budgets.

Anahtar Kavram

Power supply connector pinouts, wattage ratings, and PCIe slot lane/power specifications

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