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

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Tasukete

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Jan 2, 2014
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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!
 
Solution
aevm
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.
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aevm

aevm

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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.
 
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scoobydenon

scoobydenon

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Feb 27, 2011
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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
 
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Tasukete

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Jan 2, 2014
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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.
 
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Tasukete

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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
 
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