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Is a 850w PSU enough power for this build?: 2x GTX 780 ti SLI, i7 4770K

The title says it all. I was looking at these sites to try and estimate the amount of power I would need, but for someone to chime in and say "YEP!" or "HECK NO!" would be awesome: http://www.realhardtechx.com/index_archivos/Page362.htm (this site recommends 920watts) http://www.guru3d.com/articles_pages/gtx_780_ti_sli_geforce_review,4.html (this one has a estimated amount of only 617watts at full load)
So for the parts in my build, would I be fine with a 850watt psu? (See parts below)
Here are the parts:
PSU: http://www.newegg.com/Product/Product.aspx?Item=N82E16817139029
MSI Z87 G-45
i7 4770K @ Stock Speeds (I might want to OC @ 4.2-4.7MHz)
H100i
2x GTX 780ti
1 TB HDD
120GB SSD
5 fans
I would also like to know if this build would be fine running WITHOUT the 2 gtx 780ti(s) because I will not be able to buy them for awhile and I will be running a hd 7770 until I save up enough money for them. Thanks!
12 answers Last reply Best Answer
More about 850w psu power build gtx 780 sli 4770k
  1. Are you going to be running water cooling?
  2. Best answer
    Yes, it's fine. The 920W recommendation is padded to allow for second-rate PSU manufacturers who claim more than they deliver. Corsair does deliver. You get 70A (840W) from their 850W PSU, and it's enough.

    Yes you can run a HD 7770 for now, but when you get your nVidia cards uninstall AMD drivers and install nVidia's.
  3. The 850 Watts is just fine. The system is around 730-750 watts, so 100 watts extra is good. For the amount of money you're spending on hardware, I'd buy a top notch power supply. The TX is ok, but not outstanding. So when you add your 780Ti cards, upgrade that PSU to at least a Silver or Gold Certified PSU. Corsair HX, XFX, Seasonic & Antec are what you should look for. Having a 100 watts extra isgood for any other upgrades you add. PSU runs cooler, quieter and they have their own protection built in to help protect your expensive hardware. EXAMPLE: http://www.newegg.com/Product/Product.aspx?Item=N82E16817139011
  4. Just if you are getting a 850w get a 80 plus gold
  5. scoobydenon said:
    they have their own protection built in to help protect your expensive hardware.


    Speaking of which, I'd add this surge protector to the shopping list:
    BELKIN BE112230-08 8 Feet 12 Outlets 3780 Joules Surge Protector with Telephone and Coaxial Protection
    http://www.newegg.com/Product/Product.aspx?Item=N82E16812107196
  6. aevm said:
    scoobydenon said:
    they have their own protection built in to help protect your expensive hardware.


    Speaking of which, I'd add this surge protector to the shopping list:
    BELKIN BE112230-08 8 Feet 12 Outlets 3780 Joules Surge Protector with Telephone and Coaxial Protection
    http://www.newegg.com/Product/Product.aspx?Item=N82E16812107196


    Yes that is also a great way to protect your investment, enjoy...
  7. aevm said:
    Yes, it's fine. The 920W recommendation is padded to allow for second-rate PSU manufacturers who claim more than they deliver. Corsair does deliver. You get 70A (840W) from their 850W PSU, and it's enough.

    Yes you can run a HD 7770 for now, but when you get your nVidia cards uninstall AMD drivers and install nVidia's.


    Okay, thank you for the input! Really helps. One more question, are all surge protectors (generally) the same? I have a surge protector right now, but do I need (or would it be better to get) the one you suggested? I am not sure which brand the surge protector is, but if you need me to find out consider it done. Not sure if it matters, but I bought it within the last 3-4 years.
  8. scoobydenon said:
    The 850 Watts is just fine. The system is around 730-750 watts, so 100 watts extra is good. For the amount of money you're spending on hardware, I'd buy a top notch power supply. The TX is ok, but not outstanding. So when you add your 780Ti cards, upgrade that PSU to at least a Silver or Gold Certified PSU. Corsair HX, XFX, Seasonic & Antec are what you should look for. Having a 100 watts extra isgood for any other upgrades you add. PSU runs cooler, quieter and they have their own protection built in to help protect your expensive hardware. EXAMPLE: http://www.newegg.com/Product/Product.aspx?Item=N82E16817139011


    Alright ScoobyDenon ma man! *^* Just kiddin'. Anyway, Thanks for the input, I always appreciate it! I will consider getting a higher efficiency PSU. O_O ... +_+ I considered removing those first two sentences, but.... I think I'll leave them... >:D
  9. Some surge protectors are better than others. If yours has done its job for 3 years or more, I'd say it's good enough.

    If you've got the answers you need please pick a solution.
  10. Meepz said:
    Just if you are getting a 850w get a 80 plus gold


    This was recommended by ScoobyDenon as well... I will consider! Thanks Meepz!
  11. woltej1 said:
    YEP!


    Haha, Thanks man!
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