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How many Watts do I need on a PSU for my build?

In around 2 months, I will be upgrading my PC. I currently have a GTX 650 Ti. So i need an upgrade badly. These are going to be the specs:

Gigabyte GA-990FXA-UD3 (Rev. 4)
AMD FX 8350 4.0 GHz Octa-Core (not OC'd)
Corsair Vengeance 16GB (2x8GB) DDR3 1600 MHz (PC3 12800)
2x Geforce GTX 770 in SLI
6 fans. 2 are LED fans.

Whats a good PSU for my build?
2 answers Last reply Best Answer
More about watts psu build
  1. Best answer
    850w.

    Here's some nice units made by SEASONIC , best in the business.

    PCPartPicker part list / Price breakdown by merchant / Benchmarks

    Power Supply: Antec HCG M 850W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply ($109.99 @ Newegg)
    Total: $109.99
    (Prices include shipping, taxes, and discounts when available.)
    (Generated by PCPartPicker 2013-09-26 22:29 EDT-0400)


    PCPartPicker part list / Price breakdown by merchant / Benchmarks

    Power Supply: Cooler Master V850 850W 80 PLUS Gold Certified ATX12V / EPS12V Power Supply ($149.99 @ Microcenter)
    Total: $149.99
    (Prices include shipping, taxes, and discounts when available.)
    (Generated by PCPartPicker 2013-09-26 22:31 EDT-0400)


    PCPartPicker part list / Price breakdown by merchant / Benchmarks

    Power Supply: XFX ProSeries 850W 80 PLUS Gold Certified ATX12V / EPS12V Power Supply ($109.99 @ NCIX US)
    Total: $109.99
    (Prices include shipping, taxes, and discounts when available.)
    (Generated by PCPartPicker 2013-09-26 22:32 EDT-0400)
  2. Visit your GFX card manufacturers web site for needed CPU size.

    http://www.geforce.com/hardware/desktop-gpus/geforce-gtx-760/specifications

    Quote:
    Thermal and Power Specs:
    97 C - Maximum GPU Temperature (in C)
    170 W - Graphics Card Power (W)
    500 W - Minimum Recommended System Power (W)
    Two 6-pin - Supplementary Power Connectors


    If overclocking seriously, id suggest a Corsair HX series or Seasonic X series..... if moderate OC, Corsair TX V2 series, or XFX Core Edition.

    So 500w for system and 1st cad + 170 for 2nd

    Id suggest a 750 watter
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