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Recommend any power supply's for my computer?

I'm am going to buy the GTX 650 low profile graphics card and the answers vary whether it would work with my 300w psu and some have said to go for a 500w power supply and i can't find any. The only problem is i have have a small case and so the power supply should probably be a similar size to this:
http://www.amazon.com/Seasonic-SS-300TFX-80PLUS-BRONZE-Supply/dp/B004JUVNVC/ref=sr_1_1?s=electronics&ie=UTF8&qid=1380834033&sr=1-1&keywords=SeaSonic+SS-300TFX+Bronze+300W+TFX12V+v2.3+80+PLUS+BRONZE+Certified+Active+PFC+Power+Supply+-+OEM
Which was recommened to me on here.
I have the Lenovo H520s.
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  1. Best answer
    For a system using a single GeForce GTX 650 graphics card NVIDIA specifies a minimum of a 400 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 20 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!!! Sufficient Total Combined Continuous Power/Current Available on the +12V Rail(s) rated at 45°C - 50°C ambient temperature, is the most critical factor.

    The Seasonic 300W TFX (SS-300TFX) power supply unit, with its maximum combined +12 Volt continuous current rating of 21 Amps is sufficient to power your system configuration with a single GeForce GTX 650 graphics card.

    If you want a little more headroom you can get the Seasonic SS-350TGM that has a maximum combined +12 Volt continuous current rating of 29 Amps.
  2. ko888 said:
    For a system using a single GeForce GTX 650 graphics card NVIDIA specifies a minimum of a 400 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 20 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!!! Sufficient Total Combined Continuous Power/Current Available on the +12V Rail(s) rated at 45°C - 50°C ambient temperature, is the most critical factor.

    The Seasonic 300W TFX (SS-300TFX) power supply unit, with its maximum combined +12 Volt continuous current rating of 21 Amps is sufficient to power your system configuration with a single GeForce GTX 650 graphics card.

    If you want a little more headroom you can get the Seasonic SS-350TGM that has a maximum combined +12 Volt continuous current rating of 29 Amps.


    Thank you! Ill go ahead and look at the power supply's and then order the gtx650 + one of those power supply's :D:D thank's so much man:)
  3. The low profile version of the GeForce GTX 650 doesn't require a 6-pin PCI Express supplementary power connector, at least from the two models I've seen.

    Most TFX power supplies usually don't have any PCI Express supplementary power connectors.
  4. ko888 said:
    The low profile version of the GeForce GTX 650 doesn't require a 6-pin PCI Express supplementary power connector, at least from the two models I've seen.

    Most TFX power supplies usually don't have any PCI Express supplementary power connectors.


    Well it's good to know these thing's before future purchases :') Thanks alot!:)
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