PC Power Supply Cables, Power Supply Units | RS
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    PC Power Supplies

    PC power supplies, also known as computer power supplies, are pieces of hardware which convert high-power mains electricity into usable DC power, for the components within your desktop computer. They convert AC (alternating current) from the mains to low-voltage, regulated DC (direct current).

    Why use a PC power supply?

    Power supply units (PSUs) are an essential piece of hardware within a computer as they supply power to all the components within your PC, such as the motherboard or graphics card. Typical PSU voltages are 3.3V, 5V and 12V.

    PSUs are there to prevent spikes in the voltage supply and for surge protection.

    Where are they installed?

    You will find these power supplies in the back of a desktop computer. It is an internal hardware component.

    Computer power supplies feature a power cable connector on one side and multiple wires on the other. These wires connect to various devices within the computer to supply power to them, for example, motherboards and hard drives. Computer power supplies also have a cooling fan which expels air out the back of a computer. They also prevent overheating through voltage control. There is usually a power switch at the back and another switch to alter the voltage.

    How important is overall wattage?

    It is important that you computer PSU covers the necessary wattage that your system requires. You can work this out by roughly adding up the consumption of all your parts. It is best to have an oversized PSU as it will cover your current wattage requirements, with room for extra if you decide to upgrade any of your components.

    What is an ATX PSU?

    ATX is a specification for motherboards which many PC power supplies meet. This means that the computer PSU fits into an ATX standard case and works alongside an ATX motherboard within the PC. An ATX power supply would be suitable for use in a modular computer as it has a standard case size.

    36 Products showing for PC Power Supplies

    200 → 240V ac
    3.3V, 5V, 5VSB, 12V, -12V
    500W
    0.3A, 2.0A, 15A, 16A, 29A
    5
    -
    -
    -
    -
    -
    -
    -
    Yes
    80 PLUS Bronze
    200 → 240V ac
    3.3V, 5V, 5VSB, 12V, -12V
    500W
    0.3A, 2.5A, 17A, 18A, 38A
    5
    -
    -
    -
    -
    -
    -
    -
    Yes
    80 PLUS Bronze
    100 → 240V ac
    3.3V, 5V, 5VSB, 12V, -12V
    600W
    0.3A, 2.5A, 17A, 19A, 54A
    5
    -
    -
    -
    -
    -
    -
    -
    Yes
    80 PLUS Bronze
    100 → 240V ac
    3.3V, 5V, 5VSB, 12V, -12V
    700W
    0.3A, 2.5A, 17A, 19A, 46A
    5
    -
    -
    -
    -
    -
    -
    -
    Yes
    80 PLUS Bronze
    100 → 240V ac
    5 → 12V dc
    850W
    20A
    5
    -
    -
    -
    -
    -
    -
    -
    Yes
    80 PLUS Bronze
    200 → 240V ac
    3.3 V dc, 5 V dc, 12 V dc, -12 V dcV
    400W
    2.5 A, 15 A, 18 A, 32 A, 300 mA
    5
    150mm
    140mm
    85mm
    Desktop
    85%
    ±5%
    +5V/+3.3V/+12V/+5VSB:±5% -12V: ±10%
    Yes
    80 PLUS Bronze
    100 → 240V ac
    5 → 12V dc
    750W
    20A
    5
    -
    -
    -
    -
    -
    -
    -
    Yes
    80 PLUS Bronze
    200 → 240V ac
    3.3, 5, 12, -12V
    800W
    2.5 A, 18 A, 20 A, 66 A, 300 mA
    5
    150mm
    160mm
    85mm
    Desktop
    85%
    ±5%
    +5V/+3.3V/+12V/+5VSB:±5% -12V: ±10%
    Yes
    80 PLUS Bronze
    Seasonic
    100 → 240V ac
    3.3 V dc, 5 V dc, 12 V dc, -12 V dcV
    500W
    2.5 A, 24 A, 34 A, 800 mA
    5
    -
    -
    -
    -
    -
    -
    -
    Yes
    80 PLUS Bronze
    Seasonic
    100 → 240V ac
    -12 V dc, 3.3 V dc, 5 V dc, 12 V dc
    300W
    2 A, 14 A, 17 A, 18 A, 800 mA
    6
    150mm
    81.5mm
    40.5mm
    -
    -
    ±5%
    ±1%
    Yes
    80 PLUS Bronze
    Mascot
    230V dc
    13.2V dc
    70W
    5A
    1
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Seasonic
    100 → 240V ac
    3.3 V dc, 5 V dc, 12 V dc, -12 V dcV
    500W
    2.5 A, 24 A, 34 A, 800 mA
    5
    -
    -
    -
    -
    -
    -
    -
    Yes
    80 PLUS Bronze
    Seasonic
    100 → 264V ac
    3.3 V dc, 5 V dc, 12 V dc
    300W
    10 A, 14 A, 25 A
    -
    81.5mm
    150mm
    40.5mm
    Surface Mount
    ≥87%
    ±5%
    ±1%
    Yes
    80 PLUS Gold
    Seasonic
    100 → 240V ac
    -12 V dc, 3.3 V dc, 5 V dc, 12 V dc
    300W
    2 A, 14 A, 17 A, 18 A, 20 A, 800 mA
    6
    100mm
    125mm
    63.5mm
    -
    -
    ±5%
    ±1%
    Yes
    80 PLUS Bronze
    Seasonic
    100 → 240V ac
    -12 V dc, 3.3 V dc, 5 V dc, 12 V dc
    250W
    2 A, 14 A, 17 A, 18 A, 800 mA
    6
    150mm
    81.5mm
    40.5mm
    -
    -
    ±5%
    ±1%
    Yes
    80 PLUS Bronze
    Seasonic
    100 → 240V ac
    -12 V, 3.3 V, 5 V, 5 Vsb, 12 (Combined) V
    400W
    2.5 A, 20 A, 32 A, 300 mA
    1
    235mm
    100mm
    40mm
    Rack Mount
    >87%
    ±5%
    ±1%
    Yes
    80 PLUS Gold
    Seasonic
    100 → 240V ac
    -12 V, 3.3 V, 5 V, 5 Vsb, 12 (Combined) V
    500W
    2.5 A, 20 A, 40 A, 300 mA
    1
    235mm
    100mm
    40mm
    Rack Mount
    >87%
    ±5%
    ±1%
    Yes
    80 PLUS Gold
    Seasonic
    100 → 240V ac
    -12 V dc, 3.3 V dc, 5 V dc, 12 V dc
    300W
    2 A, 14 A, 17 A, 18 A, 20 A, 800 mA
    6
    85mm
    140mm
    65mm
    -
    -
    ±5%
    ±1%
    Yes
    80 PLUS Gold
    Nipron
    85 → 264V ac
    3.3 V dc, 5 V dc, 12 V dc, -12 V dc
    350W
    2.5 A, 2 A, 20 A, 22 A, 500 mA
    5
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Seasonic
    100 → 240V ac
    3.3 V dc, 5 V dc, 12 V dc, -12 V dcV
    600W
    2.5 A, 24 A, 46 A, 800 mA
    5
    -
    -
    -
    -
    -
    -
    -
    Yes
    80 PLUS Bronze
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