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Yeah, well Bitfury has announced their 0,06 J/GH 16nm technology, so that will get interesting also.
Then there comes 21 with their 0,16 J/GH chip

So it will be getting interesting in here  
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I saw that to but Bitfury wont sell to the public if they do it's gonna shot thu the roof price wise and 21 just what does that do be side offer a new way of accessing the blockchain does it actually mine at 1.15 th or better . if that's all it does i can build a PI for far less like some one said in a post or have a PI now that can do it. is that worth 400 bucks , no.  i see what you mean by 0,16 J/GH chip .I'll wait till Nov for that one.

I was going two buy 2 s7 at least but the price stopped me .it's more a disappoint meant to me then anything for the s7 price.