how much power i need

hi i need some help i am right now only running a core 2 quad 2.4 asus p5n32-e sli motherboard 4 gigs ddr2 800 ram and 2 plextor dvd burners and 4 sata hard drives and a asus en8800 gtx 768 meg video card and i just bought another one and want to run it in sli and need to no how much power i will need to run it hope some one can help me.
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More about power need
  1. go here follow the instructions: http://www.vbutils.com/power.asp ..:)
  2. Each 8800GTX needs two 6 pin pci-e power connectors, therefore, you need a psu that has 4 such connectors. A quality unit will be able to drive all 4 connectors, and then some. So, for a simplified filter, just look for a unit with 4 connectors. This will usually be for a 750watt psu. Look for a quality unit fromm corsair, PC P&C, seasonic.
  3. Great quality and hard to beat price:

    http://www.newegg.com/Product/Product.aspx?Item=N82E16817139006

    Will be more than enough. This powers my system with two 8800GTX ANS3 cards, Q6600, 7 120mm led fans, 3 hard drives and a couple of cd roms. Also an Ultra TEC CPU cooler and doesnt miss a beat.
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