you assert that any surge seen on input of such UPS coming through AC->DC->AC transformation survives and comes out in original form??

i've a kind of FREE power ( Not stealing it ) so i'm thinking of buying some hashboards for a cheap price and group it together in order to have a Good hashrate which ROI in short time..

so no one think that it's a Good idea while i have FREE power, i'm confused what to choose ..
if i'd like to have about 10 TH/S using BFL boards how many boards do i need and how much do you think that i have to spend on this ??

share your thoughts about it.

Explain why it is beneficial for them?

Too much profit, and they want to share it with the another pool owner?

They owned really  another pool,  but this is for solo mining.  
Total over 14.00 PH/s
https://www.antpool.com/poolStatsRankings.htm

 Any Antpool user can join it.

 I'm not sure but I think that's the same RSP-320-12 I mentioned as one of my original 2 links, just from Jameco instead of from TRC.
 (if it's not, then I have changed my mind since then on the "optimal" one as it's the one in my booklinks.)
 Mouser also carries them, I have noticed, but for a couple bucks more, and at least 1 seller on Amazon in the same price range.


 I dunno if they have enough isolation to use them in series, DO let us know how that works out.

AntPool Hashrate  is still 69.62 PH/s

Voltage control is achieved by reducing the 12V supply voltage. As the chips are powered in a string, like Christmas Tree lights, this reduces the core voltage to each chip.

Rich

I may guess that a few thousands of Sfards machines are online.

it is possible to get better price if i donot order from bitmain's website, i will go to beijing to meet bitmain on 15th around to see what is the best price i can get

https://bitcoinwisdom.com/bitcoin/calculator

7-22 – 8-4 (334 days)       -0.3571
8-5 – 8-18 (348 days)        0.04827

crap roi with 0% diff
damn! cause i wanted few units

I had one of those 49-port hubs I got damaged off CrazyGuy sometime last year but I fixed and sold it 'cause bills were due. I'm kinda wishing I'd hung onto it instead. I mean my little 10-port is nice but it's not that nice. Maybe I should build more. Or get a forty-niner. I still have some 30A power supplies, and if that's not good enough it's not like I can't build one better. I mean a slight change to the TypeZero power systems as designed would get me upward of 50A of 5VDC. That'd run a lot of sticks. I could fill the hub with 250MHz sticks and get about 670GH off that 50A. I wonder when was the last time someone had 670GH worth of stick miners running together? That would have taken 2000 Block Erupters. Dang. Actually, let me do some checkin' and see if I can't scrounge one of those up.

Speaking of, I should probably post pictures of the thing full-up with proper green-heatsink Compacs running on Novak's cgminer. I think we had about 8 plugged in when I left the shop this afternoon. They'll be swapped out with more in the next couple days.

Apparently Monday is some sort of labor holiday ("Labor Day is observed in the United States on the first Monday of September to celebrate the achievements of workers and the labor movement") which means the post office is closed and, I dunno, people are supposed to take a day off work? Yeah like that'll happen, dangit I got sticks to make. So it looks like shipping will resume Tuesday.

I believe there are several errors in your analysis.  You have assumed everyone pays a similar amount for their miners, has similar costs and does not try to drive others out of business.

1) Not all miners pay the same for their miners.  The mining hardware with the highest efficiency is not likely to be sold to the public.  It is more economic for the manufacturer to keep it to themselves and mine themselves. This is what KNC and Bitfury do.  They manufacture their own cheap hardware and do not sell to to the public.  It is in their interest to increase their hash rate as it increases their profits.

2) For similar reasons miners in areas with the cheapest electricity will try to maximize their hash rates.  Anyone who pays more than about $0.05 per kWh is likely to be ultimately driven out of the mining business.

3) Finally you have assumed people would co-operate if they all had the same costs.  But people are not always that rational in an unregulated market.  See the Tragedy of the Commons.  https://en.wikipedia.org/wiki/Tragedy_of_the_commons

The entire mining game is a zero sum game.  There is only a fixed amount of money available from Bitcoin mining.  

The best way to maximize your profits is to not share your competitive advantage and to keep your costs below your competitors.  Ideally you would like most of your competitors to give up and leave the market.

So I expect the battle between the miners to continue and the hash rate to continue to increase for some time yet.



 

We are already close to a 60 diff and likely to go over 60 at the next adjustment.  I don't see any reason why there cannot be growth to 100 by the middle of next year even at the current Bitcoin price.  There are 23 adjustments until then.

Mining, and the push for faster miners,  will continue before and after the halving.

I suspect it is much more likely we will get to 100 diff and possibly 1,000 ph before growth goes flat next year.

Both KNC and Bitfury are expecting 16 nm chips to be at 0.07 Joules/Gigahash.  This means miners with at least 3 times better electrical efficiency than current 28nm miners.  

I know there is considerable daily statistical variation but over the last few days the KNCMiners pool seems to have grown considerable.  It will be interesting to see how KNCminers and Bitfury change over the next few months.  See
https://data.bitcoinity.org/bitcoin/hashrate/30d?c=m&t=a

Another period of change is coming whether we like it or not.




  

Yep, I'll try to get 5.3.0 released before any deliveries take place.
Note I merged and deleted the "compac" branch, so just the main "bfgminer" branch is fine now.
Windows users can get git-built bleeding-edge binaries from: http://luke.dashjr.org/tmp/code/webisect/webisect.php?dobuild=bfgminer