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How many watts is enough to power my build?

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  1. Best answer
    A 500w PSU is enough, but make sure you grab a quality piece from a good manufacturer. I recommend Antec, Corsair, Seasonic or XFX. Here's a great PSU at a good price:
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817207013&Tpk=xfx%20550w&IsVirtualParent=1

    Or if you're on a budget:
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817139027&Tpk=cx%20500w&IsVirtualParent=1
  2. This is what I do.
    First Google a review of the GPU you plan on buying, ie GTX 650ti;
    Then Look at the Max power (Make sure it says SYSTEM
    ie GTX 650ti runing metro 2033 = approx 250 Watts
    Ref: http://www.anandtech.com/show/6359/the-nvidia-geforce-gtx-650-ti-review/19
    Then add 100 Watts to that value = Min PSU should be 430->450 Watts.
    500->600 Extra cussion
    NOTE if You plan on runing two GPUs in SLI/Xfire at a later date Then you should google that and add 150 Watts. Except for sli/xfire using the high end gpus a 650 Watt PSU is normally a fine choice.

    Next and JUST as important is the Brand/model.
    DO NOT buy anything less than a tier 3 PSU, Personlly I limit my choices to tier 2 (tier 1 are great, but generally at a premium cost.)
    Tier List: http://www.eggxpert.com/forums/thread/323050.aspx
  3. well, since I'm lazy>
    CPU ~ 80 W
    GPU ~ 140 W
    HDD ~ 20 W
    MB ~ 50 W
    RAM and stuff ~ 10W
    +- 50W for the reserve
    == ~350W or anything above and you should be safe...

    PS: 500W should be enough if you planed to go SLI in the future, otherwise it is obsolete :D
  4. For a system using a single GeForce GTX 650 Ti BOOST graphics card NVIDIA specifies a minimum of a 450 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 24 Amps or greater and that has at least one 6-pin PCI Express supplementary power connector.

    Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Total Combined Continuous Power/Current Available on the +12V Rail(s) rated at 45°C - 50°C ambient temperature, is the critical factor.

    Overclocking of the CPU and/or GPU(s) may require an additional increase to the maximum combined +12 Volt continuous current ratings, recommended above, to meet the increase in power required for the overclock. The additional amount required will depend on the magnitude of the overclock being attempted.
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