Topic: [ANN] Spondoolies-Tech - carrier grade, data center ready mining rigs - page 419. (Read 1260354 times)

Rev1 only

The 3500BF (http://bitfury.org/products) cost is about 0.65 $/GHs
They stopped selling when the $/GHs went below 1 $/GHs
Their plan is to replace the hashing boards with more advanced custom 40nm when it will be ready. It's delayed.

There have been at least about 50 PH deployed within last 4 weeks so it looks like Bitfury have opened 2 massive DCs unless Bitmain have opened some too

You are correct. The press release does state that they have DCs in 3 countries, not just 3 DCs.

Although I wouldn't find it surprising if Bitfury did indeed have 60-80PHs. They've been self-mining for a very long time and they claim that 40% of the network are Bitfury chips although do not claim the 40% as their own hash.

I also suspect that they have their fingers in a lot of other pies. MegaBigPower also runs some large DCs with BF chips. And we can't forget CEX/GHash also run BF hardware. I wouldn't be surprised if the Bitfury Group owned a piece of those operations too.

Please take a second to re-read what I said. The article doesn't say they have 3 datacenters, it says they have datacenters in 3 countries. You cant possibly think that each datacenter is 20MW. That would add at least 60-80PH to the network.

There are currently 3 Bitfury DCs, Finland, Iceland and Georgia according to this article...

http://www.datacenterknowledge.com/archives/2014/08/01/bitfury-asic-maker-builds-20mw-bitcoin-mining-data-center/

And try here for more info...

http://lmgtfy.com/?q=Bitfury+data+centers#

You are misinformed. Cannabis tourism is still tolerated in Amsterdam coffee shops. Although technically illegal in the Netherlands, there is no punishment for the crime therefore the city of Amsterdam (and some other cities) does not enforce the laws.

It's 37 of our own SP30s, plus an undisclosed number from other customers. I can (and have repeatedly) set up an SP30 in under 20 minutes. I usually work about 12 hours a day. I have two minions, each of whom works 8 to 10 hours a day. That's about 30 human-hours per day. On a good day, we could probably set up 90 SP30s, if none had unusual issues, and if we had all the network cables made in advance.

It will probably end up being a bad day when the GB arrives (because Murphy), but also a long day. I expect to get most of them online within 24 hours. The few that have problems might take 72 hours to get online.

it looks like bitfury wants to run the rest of the miners out of business.

Sometimes I think to just buy a bit more of BTC and maybe a little alts and disconnect until ~2020-2024 when the vast majority of BTC would be mined already. From that point on only the network expansion (tx volume) and cost of transactions would matter (for BTC price), but without reward in reasonably sized blocks, only residual mining activity would remain. I am pretty sure that even todays computational power of the network is enough to validate transactions 10 years from now. Of course, there is a limit of tx/sec, but it has nothing to do with how much miners can process already.

Actually, it's trickier than that. You don't get 208V as an independent phase-to-neutral voltage. You have to wire up to two phases to get that (hot-to-hot). A three phase 208V PDU has 1/3 of the sockets wired up between phase A and phase B, 1/3 wired between B and C, and 1/3 wired between C and A. This means if you put 7 amps on one plug (AB), that's 7 amps on phase A and 7 amps on phase B. If you put 3 plugs on AB, that would be 21 amps on A and 21 amps on B. Then you couldn't plug anything into phase C. If instead you put one on AB, one on BC, and one on CA, then you get 14 amps on each phase. You could then stick another plug on AB, and you'd get 21 amps on A and B, but only 14 amps on C. That's four plugs total, or two SP30s. Any additional plugs you put on BC or CA would bring B or A up to 28 amps, which exceeds the 80% limit for safe utilization. If you found that you could get away with that, or if you had the ability to boost voltage to 230 or 240V (or underclock your SP30s), you might be able to add one plug on BC and another on CA, putting all three phases at around 28A, with six plugs and three SP30s.

You will be getting and installing at least 30 of your own miners next week plus from others here. How long do you think for this frantic gb activity to settle down?

What pattern you are talking about? Do you know the size of the Iceland DC? Or the size of their previous DCs?

There seems to have been a pattern of datacenter deployment, the previous one was in georgia (I believe) and the last one in Iceland.

Estimations suggest Bitfury will approach an internal cost similar to just buying miners very soon, unless they get going on a higher fab node quickly.
(and by that I mean receive chips, but apparently that won´t be the case)

This might lead to a slow-down of bitfury hardware being deployed.

if you have only one unit, put it there .. Host everything you have above that one unit with jtoomim.

One unit has 2 power supplies, drawing 7A each from the wall. That is 14A maxed out .. but for sustained load, this would represent 80% of the circuit size (i.e. the circuit should be at least 17.5 Amps).

So .. as the breakers go .. a 20 Amps circuit will host you one unit. A 30 Amps circuit will host you 1 1/2 units

If you get all three phases independently at the rack level, triple that. I guess the sales guy was telling you what you paid for, not what you need.

Well putting it in your data center would have been better but I still have 1 1/2 years left on my 2 year lease so I am basically screwed.

He's out of his mind. 208V 30A 3 phase is at most 208•30•sqrt(3)•80% = 8 kW, which is enough to run two SP30s (or maybe three if you're willing to risk a breaker nuisance tripping on occasion).

My DC is cheaper, by the way. Much, much cheaper -- as low as $210 per SP30 per month. We're also used to SP30s, since that's most of what we host. We've got enough capacity for 20 SP30s easily. You should host with us instead.

http://toom.im

What makes you say that? They've only built one 20MW DC afaik.

Correct, they don't build one every month. They build one every two months.

Do you have any idea how low Bitfury's margins are? Any idea how many more of these monsters can we expect? Are they going to stop building them when they expect the marginal profit to be negative, or do they have another agenda?

Calculating the break-even point for Bitfury is tricky. First order approximation: if an entity pays about $0.05/kWh in Iceland with 0.78 kJ/TH, and if their rent and labor costs are negligible, then they'd be operating at break-even at a difficulty of 270B at current BTC prices. However, if that entity already owns 30% of the network, then their effective marginal revenue for adding each TH/s is 30% lower, and they'd reach breakeven at a a difficulty of 189B. If their rent and labor costs are 50% of their electricity costs, then they reach breakeven at a difficulty of 126B. Current difficulty is a little under 24B.

However, they might want to stop at the point where they can no longer make 100% ROI, rather than just the point at which they no longer have positive net income from each miner. Let's just say they are able to manufacture and install machines for $750/TH/s, including the datacenter, and they want to ROI before the block reward halves around June 2016. Let's say their critical DC goes online in January 2015, giving them 15 months to make ROI. Each TH/s would therefore need to net $50/month. Adding in labor and electricity, that might mean a gross per TH/s of $92. After compensating for losses in their other machines from increased difficulty, and they'd need to gross $131.6 from each machine to ROI. That corresponds to a difficulty of around 60B.

Your going to need about 60KW of power for those, a hell of alot more than 1 208V 30A can give.

Ok so this may be the wrong forum for this question if so I apologize.

If I order 20 SP30's for my 40U cabinet what size circuit will I need to power these machines, the sales guy at my data center is telling me I will need a 208V 30Amp 3 phase circuit.
Is this correct or is this guy out of his mind?

Thanks