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Will a 700W 80+ Bronze certified PSU support GTX 780 SLI?

Hello, I have a corsair GS700 series PSU that outputs up to 700w, with 80+ bronze certification. I have read some discussions about 750w psu and 780 SLI(700w discussions are no where to be found), and I have done the overall system wattage requirement calculation at the "extreme power supply calculator" site, the result ends up to be 649 watt recommended, but I still want to hear some suggestions from the ones that are experienced in this kind of setup, where the entire build only leave the PSU merely 50 watts of free space. I am currently using Intel i5 4670K, might consider overclocking to 4.0ghz which is only 200mhz above the boosted clock rate. Will the system be stable, and normally speaking, can a corsair 80+ bronze PSU support hardwares well at almost full load?
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More about 700w bronze certified psu support gtx 780 sli
  1. it should be fine but 750+ would be safer if you can afford it
  2. Best answer
    extreme power supply calc sounds about right to me.
    750W is definitely more of a recommended number, and there is definitely some sense in having headroom, but it's likely you'd be able to run them fine.
    My question would really be, do you want to? Two GTX 780s is at least $1000 so stumping up ~$100 for a new PSU is a minimal expenditure, relatively speaking.
    As soon as you start fiddling with overclocking, wattage predictions can be very hard to make.
  3. I'd get a 850watt to leave headroom
  4. go with 2 770's and put the money into a 1000w psu
  5. 850 watts is recommended for GTX 780 Sli.

    http://www.realhardtechx.com/index_archivos/Page362.htm

    The GS series are not high end units and it only has 2 x 6+2 pin PCI-E connectors. I would not even try it.
  6. NormH said:
    go with 2 770's and put the money into a 1000w psu


    2 x GTX 770s however, would be fine with a 750w unit.
  7. yes thats good but why buy a 750 watt when u can get a 850watter for a bit more. and leave headroom for overclocking and more components :)
  8. Thank you for the replies, I guess my attempt at cutting cost on PSU is quite unwise. I am not really on a budget, so I guess I will just go for a better PSU as well. Thank you again!
  9. excellent heres what me recommand.

    http://www.newegg.com/Product/Product.aspx?Item=N82E16817207028 for 129$ is beast
  10. 800w at least, better be safe than sorry
  11. Yep
  12. Jackiel said:
    Hello, I have a corsair GS700 series PSU that outputs up to 700w, with 80+ bronze certification. I have read some discussions about 750w psu and 780 SLI(700w discussions are no where to be found), and I have done the overall system wattage requirement calculation at the "extreme power supply calculator" site, the result ends up to be 649 watt recommended, but I still want to hear some suggestions from the ones that are experienced in this kind of setup, where the entire build only leave the PSU merely 50 watts of free space. I am currently using Intel i5 4670K, might consider overclocking to 4.0ghz which is only 200mhz above the boosted clock rate. Will the system be stable, and normally speaking, can a corsair 80+ bronze PSU support hardwares well at almost full load?


    Honestly if i were you i would take advice and go with a atleast 850w power supply. Yes possible the 750w would work but your cutting it close with little to no head room and your going to sorta be setting your self up to possible getting another psu when you could of done it right the first time..
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