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PSU recommendation ?

So far this is my build http://pcpartpicker.com/p/wPZ2bv

According to PcPartPicker, the system will need atleast 443W. Though I may overclock the cpu and gpu(though possibly won't OC) a bit. The most I would concider overclocking the cpu is 3.9 - 4.0ghz.

I read somewhere with the gpu I need to make sure the 12v rail contains one rail to provide 40A I believe. What PSU would be recommended for me? I looked at a guide on this site about PSU, and understand a little bit of it, but wanted an answer provided by more experienced people. This will be a gaming rig.
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More about psu recommendation
  1. The 280X maxes out at about 250W, which is just over 20A and requires a 8+6 PCIe power setup. You are not going to need 40A on a single rail unless you run practically your whole system off of it.

    Since the Nova has a bunch of 20A outputs, you can simply use a pair of PCIe power connectors from different outputs to power the GPU and call it a day.
  2. Best answer
    R9 280X requires 30 Amps on the 12v rail & a 550W psu minimum

    I'd go with 650W to give you all the headroom you could need. These are a tier higher than the EVGA NEX:

    XFX Pro 650W 80+ Bronze ($69) : http://pcpartpicker.com/part/xfx-power-supply-p1650snlb9
    XFX XTR 650W Fully modular 80+Gold ($95): http://pcpartpicker.com/part/xfx-power-supply-p1650bbefx

    XFX Pro/XTR 750W Fully modular 80+ Gold ($88): http://pcpartpicker.com/part/xfx-power-supply-p1750bbefx
    EVGA Supernova G2 750W Fully modular 80+ Gold ($95): http://pcpartpicker.com/part/evga-power-supply-220g20750xr

    (Power Supply Unit tier list: http://www.tomshardware.co.uk/answers/id-1804779/power-supply-unit-tier-list.html)
  3. Great PSU for the cost:

    PCPartPicker part list / Price breakdown by merchant

    Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply ($44.99 @ NCIX US)
    Total: $44.99
    Prices include shipping, taxes, and discounts when available
    Generated by PCPartPicker 2014-06-12 14:35 EDT-0400

    550w is enough headroom for the kind of overclocking you'll be getting with those parts, and the XFX is great quality.
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