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What power supply for ASUS Maximus V Formula + gtx 670 sli

So I was researching the asus maximus v formula and that is the mobo that I want to get but I am concerned about the power. I want to have a modular QUIET power power supply. According to my calculations I would need around 810 Watts when I am all done building.

Build

CPU - i7 3770k OCd to 4.4
Mobo - Asus Maximus V Formula (24 pin, 8 pin and 4 pin)
Mem - G.SKILL Ripjaws X Series 16GB
GPU - 2 x GTX 670 FTW (4 x 6 pin)
HDD - 2 x 1 tb WD black caviar
SSD - 1 Samsung 840 pro

What power supply could you suggest?
 
A nice 750w would be fine. One of the Corsairs, Antecs, or Seasonics is what I'd recommend.

When I dropped it into the newegg calculator it said above 800. I would rather error on the side of caution ie more power vs less.

My main question is though, I dont see an option for an 8 pin connector. Is that a 6+2?

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139011

That one has 6 6+2 pins. So I assume the two gtx's will have some 6 pins plugged in and 2 of those pins haning off the side? And the mobo will have 24 pin main power, the 8 pin = 6+2 but how do I plug in the 4 pin?
 
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That is correct. Those online calculators grossly overestimate your needs to get you to buy more expensive units (and to account for no-name units that can't deliver the promised numbers.) Believe me, your system will have a hard time pulling 550 watts at load. My current machine struggles to use 300 watts. I know you plan on getting two cards but my 580 uses much more power than one of your 670s and my Sandy is more power hungry than your IVY. People do 750w units for 580 SLI OCed all the time.
 
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