Best Power Supply for SLI GTX 660s?

I am planning to put in two GTX 660s into my new build. I have seen different power supplies with different wattages and such, but I have no idea which one to choose. The main questions that I have are:

1. How much wattage should I need for these cards?
2. Are there any recommended PSU specs that I need to know other than wattage?
3. Are there any PSUs that you could recommend?

I am really looking forward to my new build, and the power supply is one of the last components. The other relevant specs of my system are:

Processor: Intel i5-3470
Motherboard: Gigabyte GA-Z77X-UD3H
Hard drives: 1 500GB hard drive at 7200rpm
RAM: 2x Corsair XMS3 4GB at 1333Mhz

If you need any other specs don't hesitate to ask.
5 answers Last reply
More about power supply sli gtx 660s
  1. Corsair 750TX V2
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817139021
    Seasonic made, 62 amps on the 12V, 3 yr warranty

    Seasonic X750
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817151087
    80Plus Gold, 62A 12V power, 7 year warranty, fully modular
  2. bigcyco1 said:
    Corsair 750TX V2
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817139021
    Seasonic made, 62 amps on the 12V, 3 yr warranty


    I was looking for something more on the budget side, preferably under $75, $80 is the maximum. Thanks for the recommendation though, I will probably get it if there are no quality cheaper ones.
  3. http://www.geforce.com/hardware/desktop-gpus/geforce-gtx-660/specifications

    450 w for the system and 1st card + 140 w for the 2nd so 600 watts will do it. I'd be comfy w/ a 650 if not over clocking. Id want a 750

    Best - Seasonic X series, Corsie HX, XFX pro
    Very Good - Corsair TX, Antec HCG / HCP, XFX Core series

    Corsair TX 750 has 15% off w/ promo code EMCXSWL36 and $20 MIR = $73.50
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817139021

    Antec HCG - $10 off w/ promo code EMCXSWM23, ends 4/24 + $20 MIR = $70
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817371049
  4. For a system using two GeForce GTX 660 (non-Ti) graphics cards in 2-way SLI mode NVIDIA specifies a minimum of a 600 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 36 Amps or greater and that has at least two 6-pin PCI Express supplementary power connectors. If you have the MSI GeForce GTX 660 HAWK 2 GB, it requires two 6-pin PCI Express supplementary power connectors for each graphics card, so you'll need a total of at least four 6-pin PCI Express supplementary power connectors on the power supply unit.

    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) will 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.

    Rosewill CAPSTONE Series CAPSTONE-550 550W Continuous @ 50°C, 80 PLUS GOLD Certified, Single +12V Rail, ATX12V v2.31 / EPS12V v2.92, SLI Ready, CrossFire Ready, Active - PFC Power Supply $79.99
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817182068
Ask a new question

Read More

Power Supplies SLI Components Nvidia Gtx Graphics Cards New Build