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What is the best wattage for SLI?

JustAnotherGamer
  • 69 months ago

Title says it all. I'm going to get another card for SLI at some point in the future and I'm wondering what wattage will be the best. I'm mainly looking in the 850-1000w range.

Comments

  • 69 months ago
  • 1 point

too many variables. what cards in SLI? how many cards? what about the rest of your parts?

  • 69 months ago
  • 1 point

Two 780 Ti's, a 4770K, and 16GB G.Skill Ripjaws 2133MHz.

  • 69 months ago
  • 1 point

Make a part list on here. It will tell you the min/max wattage estimate required. Tack on a little extra headroom to that, and BAM... you'll have your magic answer.

  • 69 months ago
  • 1 point

Well I've made a part list and with the extra card it will be around 750W. Will 850W work?

  • 69 months ago
  • 1 point

Do you plan on overclocking?

  • 69 months ago
  • 1 point

Around 4GHz or slightly above on the 4770K and around 1.15 GHz on the 780 Ti.

  • 69 months ago
  • 1 point

So lets figure out how much power the cpu + gpus will actually pull around. The combined load with overclocks should draw around 695w.

i7 4770k overclocked to 4.7GHZ around 171 watts (+/-10w) http://www.bit-tech.net/hardware/2013/06/01/intel-core-i7-4770k-cpu-review/7

Geforce GTX 780 Ti 262 watts each (524w) http://www.guru3d.com/articles_pages/geforce_gtx_780_ti_review,8.html

Edit: Guru stresses with benchmarks so power draw is higher then usual.


Pcpartpickers power draw is around 687w. http://pcpartpicker.com/p/jnZrYJ

Verdict: A good 800-850w psu is plenty. Just make sure the rails can support the load(take the amps on the 12v rail and multiply by 12). 850w if you want to be "safe".

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