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Is a 650 Watt PSU good enough for my build?

ASRock Fatality Z77 Performance
GeForce GTX 570 2GB
Intel Core i7-2600 3.4ghz
G.SKILL Ripjaws 4 x 4GB

I'm just a little worried about the GPU. I'm upgrading from an HD 5770 and based on hwcompare, the GTX is going to require 103% more power. Is 650 watt still enough?
4 answers Last reply Best Answer
More about watt good build
  1. Yeah easily.
  2. A 550w PSU would be sufficient for you rig.

    SeaSonic M12II 520W - 80 PLUS BRONZE Certified Modular Active PFC Power Supply
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817151093&Tpk=m12ii%20520
  3. Best answer
    The GTX 570 draws 268W maxed out. ( http://forums.atomicmpc.com.au/index.php?showtopic=264) Something you will rarely achieve. At +12V, that works out to about 22.3A. Make sure your PSU's +12V rail(s) will handle that. Most good quality 650W PSUs have no problem with those requirements. Btw, here is a PSU Calculator you can use too: http://www.thermaltake.outervision.com/
  4. For a system using a single GeForce GTX 570 graphics card NVIDIA specifies a minimum of a 550 Watt or greater power supply that has a combined +12 Volt continuous current rating of 38 Amps or greater and that has at least two 6-pin PCI Express supplementary power connectors.

    Total Power Supply Wattage is NOT a crucial factor in power supply selection! Total Continuous Amperage Available on the +12V Rail(s) is the most important.
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