Power supply

i want to build my pc,i choose i7 920,maximus III gene,ddr3 ram 4gb,radeon HD 5870,3-4 fans,and some neon lights.how much watt of power supply i need it to power up that monster.pls help me.
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  1. Here is the official ATI power recommendation for a pc system with an HD 5870 video card:

    ATI Radeon™ HD5870 System Requirements:

    PCI Express® based PC is required with one X16 lane graphics slot available on the motherboard.

    500 Watt or greater power supply with two, 75 watt, 6-pin, PCI Express® power connectors.

    600 Watt or greater power supply with four, 75 watt, 6-pin, PCI Express® connectors for ATI CrossFireX™ technology in dual mode.

    The power supply recommendations are for an entire pc system.
  2. One video card, not an X2, a Corsair 550VX (41 amp 12 volt rail)
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817139004

    With that video card, I'd put in a Corsair 650TX (52 amp 12 volt rail)
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817139005

    But then, I tend to deliberately overspec PSU's.
  3. JohnnyLucky said:
    Here is the official ATI power recommendation for a pc system with an HD 5870 video card:

    ATI Radeon™ HD5870 System Requirements:

    PCI Express® based PC is required with one X16 lane graphics slot available on the motherboard.

    500 Watt or greater power supply with two, 75 watt, 6-pin, PCI Express® power connectors.

    600 Watt or greater power supply with four, 75 watt, 6-pin, PCI Express® connectors for ATI CrossFireX™ technology in dual mode.

    The power supply recommendations are for an entire pc system.
    .

    thanksi think 750 watt is best.can u tell me ur from which country.
  4. USA
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