Quote from: Spondoolies-Tech on September 04, 2015, 01:07:39 PM

Quote from: brontosaurus on September 04, 2015, 09:46:33 AM

Quote from: dogie on September 03, 2015, 11:44:55 PM

Quote from: GenTarkin on September 03, 2015, 05:17:43 AM

Quote from: dogie on September 03, 2015, 05:11:26 AM

Bit of a weird thread to bump, but I'll believe it when I see it. The last 3 chips have never been independently verified or even seen outside of a super farm.

Considering they make up nearly 1/3rd of the network alone .... thats evidence enough.

Of power claims? Its only evidence that they have money, and $60M buys you a lot of miners and a lot of PR.

Dogie is bang on the money here, this announcement by Bitfury is simply an exercise in misdirection and PR bullshit. They have had several attempts to make a really high efficiency chip and obviously don't know the recipe. It's easy to say 'my chip can do xJ/GH/sec' without revealing key factors like how big it is (very important), what voltage it runs at and the clock speed at the rated efficiency. In all fairness to Bitmain with their BM1385 they have fullfiled most of these conditions, but no mention of the die size as yet.

To believe that Bitfury can go from an alleged 0.2 J/GH/sec in 28nm to 0.05 in 16nm is nonsense, unless they have very specific measurement points that bear no resemblance to actual operating conditions in practice. 16nm is not a magic bullet - at best you will get half of the power consumption of an existing 28nm design and maybe 2.5 - 3 x the transistor density, very much depending on your design and memory content. KNC tried this same trick with their solar chip, presumably to try to dissuade their competitors and this is more of the same.

The only company that has ever been totally transparent in what they claim to be able to achieve in terms of power efficiency AND tell you how they actually achieved it (eg domino logic) is Spondoolies, and that's largely due to the collective industrial experience of their people and their attention to detail. I'm pretty damn sure that if they were still selling to the public they could come out with all kinds of data about what they could achieve and how they could do it, but they have wisely stayed out of this game and left it to the bullshitters.

By the way, anyone every looked at the size of Bitfurys various 'boards' - they have an awful lot of people to pay......what on earth do they all do? Is this some kind of weird vanity project?

brontosaurus, I always like to read your posts.
A little tidbit I can share (not under any kind of NDA):
BitFury (Valery Nebesny) attempted to do async, domino logic 55nm 5 engine scrypt chip and failed.
Here is the chip floor plan:

I really liked George BS statement: https://twitter.com/BitfuryGeorge/status/639064051612524544

There are two all important parameters in Bitcoin ASICs:
GH/mm^2 - Capex and J/GH - Opex

With extreme design techniques, sub 0.1 J/GH is possible also on 28nm processes, the question is what will be the GH/mm^2 - miner cost.

Whenever BitFury gives efficiency numbers (J/GH), they never give the all important GH/mm^2 numbers.

When they're selling hosted hash-rate of their 28nm machines to their customers, they claim the machine efficiency is 0.35 J/GH

Interesting, I didn't hear about BitFury's scrypt miners.. Were there any announcements? I remember epic fail with scrypt miners from Bitmain, when guys had pre-orders on their site and then said "ooops" Undecided