What is the best Wattage Calc to use?

bmac93

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May 5, 2013
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Just a quick question, as i am getting mixed results with wattage calculators...

I feel like eXtreme is the best one to use, but here is my setup (once xmas is here) and what i may do with it.

Standard ATX Mobo
i5-6600K
MSI 970
2x8gb DDR4 RAM
CD Drive
x2 SSD
x1 External HDD

I would like to potentially add another 970 and run an SLI. Here is my current PSU

http://www.newegg.com/Product/Product.aspx?Item=N82E16817116024

From what i have seen,the 700w should be enough for an SLI build, both according to eXtreme and Newegg's calculator. Thoughts?

 
A few things first:
The link to your current PSU is blank.
Ideally you'd like a PSU with at least a 20% overhead beyond your max wattage consumption. As most power supplies are 80 plus rated, that means you won't be destroying your electrical budget every month.
So if you think you're going to be pulling max 700 watts, you'd want at least an 80 plus certified 850w PSU.

If you're going to run all that in SLI, I'd go with a 80 plus gold certified 1000w PSU. It'll stay efficient and you won't have to worry about power limits if you're overclocking the CPUs and GPUs
 


Thanks for letting me know about the link. Fixed it. eXtreme recommends 568w and the power load is 518w as well as newegg, and thats what i have. This is with the SLI config... So are you saying i shouldnt follow this?
 
I know off hand the 980 TI has a max wattage of about 325 so the 970 is probably somewhere around 280 a piece. So figure the two of those plus another 100 or so for the CPU and another 30-50 for periphs. That's 710 then we'd want to run it so we're at max hitting 80%. 710/.80= 887.5 So you'd want to be around 850-900w range.
 
There really isn't any. Even the one on PC Part Picker goes by estimated power draw vs. actual power draw and that's the way most of them work. The thing is manufacturers often overestimate power draws on power supplies based on poorly manufactured units. They don't take into account what quality tier 1 units like Leadex and Seasonic can handle. That is why you're getting mixed results. I think it should be fairly simple - CPU on stock / overclocked (110W - 150W) plus GPU draw (970 draws 145W) x 2 + drives and fans (~30W) and that would give you an estimated power draw of something like ~430W - ~490W. But I always go over what the estimated says just to be on the safe side.

With that you're looking at something like this:

- http://www.newegg.com/Product/Product.aspx?Item=N82E16817139083
- http://www.newegg.com/Product/Product.aspx?Item=N82E16817438056