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GTX 780ti SLI on 850W Power Supply

I am looking to get 2 780ti's for my system but unsure of whether my power supply will be able to support it. I have an XFX 850W Bronze rated power supply. I will probably be getting two of the zotac gtx 780ti oc for my system because they are the cheapest and still factory overclocked. Do you think this will be enough or should i get a 1000W Corsair Gold rated PSU?
Thanks
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More about gtx 780ti sli 850w power supply
  1. Hi tom_taylor97
    two 780 ti in sli will require minimum 950 watts so 1000 watts will give you some headroom , your 850w will not be enough
    where are you from i will try to find you the cheapest quality psu i can
  2. You should go with 1000W because soon or later you will go with custom OCing which if you go with 850W you will have 100% problems. Check here for more info: http://www.overclock.net/t/1471448/psu-for-gtx-780ti-maybe-sli
  3. thanks micky but i think ill stick with the corsair psu becuase its one of the cheapest on the site i buy parts from ans i can then use corsair link but thanks anyway
  4. thats fine m8 , just be sure to get a TX ,HX or AX psu from corsair as these all have high grade japanese capacitors
  5. dont get a cx or rm or vs , especially cx or rm
  6. mickypheonix said:
    dont get a cx or rm or vs , especially cx or rm


    oh... i had been looking at this but it is RM
    http://www.scan.co.uk/products/1000w-corsair-rm-series-full-modular-80-plus-gold-1x135mm-atx-v24-psu
  7. the rm series have low grade capacitors and overheating issues , best to avoid them
    http://www.scan.co.uk/products/1000w-evga-supernova-full-modular-80-plus-gold-atx-psu
    or
    http://www.scan.co.uk/products/1050w-seasonic-x-series-full-modular-80-plus-gold-atx-psu
    EDIT: they both have high grade japanese capacitors and the evga has a ten year warranty
  8. mickypheonix said:
    the rm series have low grade capacitors and overheating issues , best to avoid them
    http://www.scan.co.uk/products/1000w-evga-supernova-full-modular-80-plus-gold-atx-psu
    or
    http://www.scan.co.uk/products/1050w-seasonic-x-series-full-modular-80-plus-gold-atx-psu
    EDIT: they both have high grade japanese capacitors and the evga has a ten year warranty


    Thanks for the help... wanted to use corsair link but dont wanna pay the price for the good corsair power supplies... which would you advise out of the two you suggested?
    Thanks

    Edit: I was thinking of the EVGA because it mentions a 10 year warranty with the manufacturer as well as 2 years with retailer.
  9. Best answer
    the supernova is only about £10 more expensive than the rm , has a ten year warranty and high grade caps
    and will run your cards just fine
  10. mickypheonix said:
    the supernova is only about £10 more expensive than the rm , has a ten year warranty and high grade caps
    and will run your cards just fine


    Ok thanks a lot for the help... i know little to nothing about power supplies
  11. better to buy quality than throw your money away on a psu that lets you down with low grade capacitors , Poor quality capacitors break down quickly over time resulting in spiky voltage being delivered to the motherboard. This results in motherboard breakdown or poor cpu performance.
    a ten year warranty also is hard to beat
  12. mickypheonix said:
    better to buy quality than throw your money away on a psu that lets you down with low grade capacitors , Poor quality capacitors break down quickly over time resulting in spiky voltage being delivered to the motherboard. This results in motherboard breakdown or poor cpu performance.
    a ten year warranty also is hard to beat


    Yeh i thought 5 years was good but 10 is great.
    Thanks
  13. glad to help , i hope it all goes well for you , all the best
  14. I have 2 x 780ti on 2 way sli with 850w psu.. with i7 4770k with Corsar H100, ssd 250 gb, 16 gb ram and the computer only use 570w when grafic cards are on 98%
  15. I've got SLI EVGA GTX 780Ti Classified cards on a XFX Pro 850W Black Edition http://www.amazon.co.uk/gp/product/B00B88Z0LM with an i7-4790K and overclocked everything a bit with no problems.

    It's a great supply manufactured by Seasonic.
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