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Direct Current or DC after it leaved SMPS (Switched Mode Power Supply).

On a laptop computer the charger/power supply is a single voltage, around 19 volts DC (depending on model no.)

On desk top computers, the PC Power supply has several different DC voltages and different wattage capacities.

They are

+5v

+12v

- 12v

-5v

+3.3v

Loads of different coloured wires and plugs take the power to the motherboard, hard drives, optical drives and some graphics cards.

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13y ago

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