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5321  Bitcoin / Mining speculation / Re: Advice On Bitcoin Miners. on: April 15, 2016, 12:26:44 AM
That be them (swamp cooling). Something else to keep in mind is that the miners do NOT need an ambient 'comfortable' for people. My main farm remains quite happy when their room gets up to 85-87F in the summer.

I've wondered about the future of miners a lot recently one thought was miners cooled by liquid nitrogen in some way, I see quantum computing is taking big leaps forward and they use liquid nitrogen to keep the chips cool. even though the systems are the size of a room at the moment we can't be too far away from scaled down versions of this..

also liquid cooled boards and chips is something I am interested it. If they can make CPU liquid cooled then sureley btc miners could follow suit?
BitFury with their data tank division are the ones to talk to on immersion cooling setups. Very efficient means of moving the heat from a very compact point-A (the miner tank(s) to Point-B (outside). Large-scale of course with each tank handling several hundred THs I believe.
5322  Bitcoin / Mining speculation / Re: Advice On Bitcoin Miners. on: April 15, 2016, 12:15:35 AM
That be them (swamp cooling). Something else to keep in mind is that the miners do NOT need an ambient 'comfortable' for people. My main farm remains quite happy when their room gets up to 85-87F in the summer.
5323  Bitcoin / Mining speculation / Re: Advice On Bitcoin Miners. on: April 15, 2016, 12:04:16 AM
For a reference, CK pool is currently running ~34PHs. and today has hit 5 blocks. Yesterday they hit 11, day before that it was only 1 block. Running my 110THs they paid me 0.08 BTC per block. You do the math on earning vs the Solo Lottery and well.....
5324  Bitcoin / Mining speculation / Re: Advice On Bitcoin Miners. on: April 14, 2016, 11:37:58 PM
I might add that @ $563 USD and 4.7THs each for s7's, 20k$ (USD) buys 35 miners for >166THs...

 Thanks fuzzy.

But i must say the 20k must buy us miners and PSU's and cooling.  We already have racking and the factory has Inert gas fire suppression systems in place,
For cooling, moving outside air in and out is the best choice. Where practical, look at large-surface swamp cooling if ambient is regularly over 90F. Additional benefit is that being for all intents and purposes wet air filters the swamp cooling gives ya pretty clean air. Having free(ish) electric is great if real AC is really needed but that should be a last resort because when it comes down to it all miners are perfect heaters. All power in is expelled as heat. Please no nitpickers about micro energy sent over the 'Net etc...
5325  Bitcoin / Mining speculation / Re: Advice On Bitcoin Miners. on: April 14, 2016, 11:24:51 PM
I might add that @ $563 USD and 4.7THs each for s7's, 20k$ (USD) buys 35 miners for >166THs with around 45kw power usage ... Got a hunch the exchange dif between 20k USD and 20k Pounds would cover any VAT you face no?
5326  Bitcoin / Mining speculation / Re: Advice On Bitcoin Miners. on: April 14, 2016, 10:52:27 PM
I do have to agree with VirosaGITS on using s7's. Using the Bitmain supplies pretty much across all batches since b7 my monitoring reads 6.2A on a 208v line (1.290kw) and on the whole producing as advertised 4.7ish THs. Some a tad less, some consistently averaging >5THs. Currently $563 USD vs the Avalon6 @ $900 for 3.5THs @ 1kw ish load.

I should add that I just picked up one of the latest batch-16 with the one fan and so far it is doing fine. Ordered on Wednesday and got it the Monday after. Temps surprisingly  Cool the same as the 2-fan ones sitting next to it.

I also MUST add that now since the foundry TSMC has had time to re-calibrate their 16nm Fab after the earthquake earlier this year I suspect that we will be seeing Bitmains miners using 16nm nodes size showing up in (hopefully) the next month or less. Unlike *some* miner chip makers <cough, BitFury> Bitmain has always been very quiet about new tech until it is actually in production with fast and on-schedule delivery. It is a cert that Bitmain's last 2-3 batches have been their Plan-B to cover their ass on any delays in 16nm chip production.
5327  Bitcoin / Mining speculation / Re: Advice On Bitcoin Miners. on: April 14, 2016, 10:11:17 PM
Now onto my next question. Were in the UK are reputable sellers of miners? or is this going to be a shipping job for outside the UK?

There are so many sites advertising them knowing which ones are reputable is a bit of a stab in the dark,
As far as I know, a company called BlockC is the only globally Authorized direct distributor of the Avalons http://www.blockc.co/ so they are the ones to talk to. Anyone else outside of China is reselling from them. BlockC is who folks here used for group buys of Avalon6's. Since they only sell in lots of 10 or more sounds perfect for your plans.
5328  Bitcoin / Mining speculation / Re: Advice On Bitcoin Miners. on: April 14, 2016, 05:16:34 PM
For the S7 and any other miner that uses less than 1400w I highly recommend Bitmains 1600w PSU. A general rule of thumb - for sustained loads eg. mining - always keep the load at 90-80% or less of a PSU rating. I have 25 of them and zero problems. Aside from that they already come with 10 PCIe connectors.

Just out of curiosity, do you run them 24/7?  If so what is the average hash rate you see from this setup.
Do you join into a pool or are you solo mining with you s7's?
Of course they run 24x7x365. In mining it usually makes no sense to turn them on and off. Some of the supplies date back to Bitmain's Batch-2 (around a year ago?). Before the s7's came out I was mostly using HP DPS1200 server supplies for the (then smaller) farm of s3, s4, and s5's. Currently per CK pool my total average hashrate is 110THs now running mostly s7's.

Unless you run a peta-hash farm, these days solo mining is more for fun with folks using USB stick miners or other low (ish) power/hashrate device. The odds of hitting a block vs daily power costs even if near free are too high.
5329  Bitcoin / Mining speculation / Re: Advice On Bitcoin Miners. on: April 14, 2016, 03:05:16 PM
For the S7 and any other miner that uses less than 1400w I highly recommend Bitmains 1600w PSU. A general rule of thumb - for sustained loads eg. mining - always keep the load at 90-80% or less of a PSU rating. I have 25 of them and zero problems. Aside from that they already come with 10 PCIe connectors.
5330  Alternate cryptocurrencies / Mining (Altcoins) / Re: Hacking KNC Neptune / Jupiter / Titan miners back to life. Why not? on: April 12, 2016, 01:11:22 AM
re Searing:
"But to further go into the hole on this TOY. (when in doubt and tossing money in a hole best to keep the toy/amusement factor in mind)"

Absolutely love that line of thought. Hope ya don't mind if I steal that line from time to time Wink
5331  Bitcoin / Mining support / Re: Running Miner off of Deep cycle batteries - expected drain? on: April 11, 2016, 07:18:39 PM
Ja they are massive power -- which in turn means massive weight. As is several hundred to over 1k Lbs each so plan on needing an engine hoist or other heavy lift device to handle them...
5332  Bitcoin / Hardware / Re: So just how hard is it to get BitMain to fix warrenty repair? on: April 09, 2016, 01:38:12 AM
RE here https://bitmain.zendesk.com/hc/en-us/articles/203361315-Board-Diagnostics for what you can do as basics checks -- and how to remove boards from sinks. (does NOT apply to the s7! They want the whole boards)
It is for an S4 but still applies. Somewhere they have a page on others as well...

edit:  duh, just click back a like to the Troubleshooting home https://bitmain.zendesk.com/hc/en-us/categories/200236359-Troubleshooting
5333  Bitcoin / Hardware / Re: So just how hard is it to get BitMain to fix warrenty repair? on: April 09, 2016, 12:31:25 AM
without voiding the warranty you ARE however allowed to swap the controller cables around to verify a cable or socket isn't bad. It probably be something they will ask you to do so try it ahead of time to save on playing email ping-pong before they issue an RMA.
5334  Bitcoin / Hardware / Re: So just how hard is it to get BitMain to fix warrenty repair? on: April 08, 2016, 11:35:41 PM
I've only had 2 problem miners, a s5 and and last Feb a s7. Both had DOA cards. Filed the repair ticket, they got back in a day or so with a few questions I answered (also had made screen shots of the GUI's showing the problem).

They got back with the RMA procedure. If you are lucky and is not all cards, the bad card(s) will need to be returned at your expense. In both cases I got a replacement card 2-3 days after UPS said the got it. Dunna know how so fast They pay the for shipping the card(s) back to you.

From the USA my cost shiping to China using UPS's cheapest international  was $75.  Shocked
5335  Bitcoin / Hardware / Re: [1TH/s] How much traffic is a Miner with 1TH/s generating in 24 hours on: April 07, 2016, 11:35:31 PM
I run upward of 200TH here (probably closer to 300, but I'm not really sure) for 20-odd customers (so a lot of different pool connections) and it burns about 100kbit of internet bandwidth.
That jives with what I see at work. FINALLY getting fiber into the industrial park where we are but still for now we just have bonded-T1 handling VOIP and a measly 1.75mbit dl speed Internet. The 90THs there does put a dent in that, so was thinking about putting in a 4g HotSpot. Bzzzt. Nope - to much monthly data When I looked into it think I was running 32THs and that was just under 10gb/month. I calc'ed (based on real data from s3's. Loved OpenWRT for that!) me eating around 25-30kbit. It doesn't need high bandwidth but that slow speed is non-stop 24x7x365 so adds up fast if using something with a data usage plan.
5336  Bitcoin / Hardware / Re: [1TH/s] How much traffic is a Miner with 1TH/s generating in 24 hours on: April 07, 2016, 11:26:39 PM
Plus most pools limit average per-miner bandwidth by controlling the difficulty. Kanno keeps it around 18 shares/sec.
5337  Bitcoin / Mining support / Re: Running Miner off of Deep cycle batteries - expected drain? on: April 07, 2016, 11:18:25 PM
And you cannot drop below around 11.7 or the miner will be very unhappy... More than anything the time it takes to drop to that is what matters and that small of a voltage swing puts you back to normal (but big) batteries.

Deep cycle batteries are designed to routinely withstand going from full charge 12+v nominal to below 8v or less @ sustained high load which would rapidly kill a normal battery. Remember, they are for trolling motors, electric pallet jacks, and RV power etc. Now if they feed an inverter or a switching buck/boost regulator to hold @ 12V out, whole different story.

edit: NM. Just read reply ^^
5338  Bitcoin / Hardware / Re: ASIC manufactures ... who is who? on: April 07, 2016, 11:03:21 PM
4) All crypto ASIC suppliers / manufactures are evil.
I wouldn't exactly say that but -- they ARE strictly in it for the money. That said, yes there have been many that pushed things too far and definitely took advantage of a market that was biting at every Shiny New Thing they announced eg, AMT/Bitmine.ch, BFL, BA et al and I am sure that there will be others. Still definitely Buyer Beware of any new company that shows up.

For now, the only ones still standing with any decent reputation for delivering product after the past 2 years of scammers are Bitmaintech, Avalon, and BitFury. Love'em or loath'em, only Bitmain and Avalon make usable miners for the general public. I leave out Inno because of the A1 is now useless and anything based on their A3 still ain't there for the public. As for the SP50... Roll Eyes
5339  Bitcoin / Hardware / Re: ASIC manufactures ... who is who? on: April 07, 2016, 10:49:17 PM
One of the problems with the Prisma was a lot of air escaped out the middle of the endcap. If that was blocked off, it forced more air to go through the end of the heatsink and kept 'em cool better. Tubes had a similar problem.
Geeze that makes me feel old... Back in the mid 70's when I was in the Airforce I worked on some SCR switching power supplies for microwave xmitters - 10kw @ 5kvdc... Anywho the banks of scr's used the exact same heatsink design but 1 piece (a Wakfield part actually) vs 4.

Same potential problem of air bypass down the center. Perfect solution is a cone pointing inward for about 1/2 the heatsink length vs a flat plate blocking it. The cone creates a much smoother pressure distribution towards the fins, flat plate makes a lot of turbulence right where ya don't want it - at the heatsink exit.
5340  Bitcoin / Hardware / Re: Bitfury: "16nm... sales to public start shortly" on: April 07, 2016, 05:31:40 PM
Or just a simple way to make us hesitate in buying the S7/A6 ;-)

Stopped me from buying several more miners. What's everyone's best guess on a competitor release date of a 16-14nm machine?
I've harped on this issue (availability time frame) since companies 1st started making noise about 16/14nm around the end of last year. It didn't stop me from getting more s7's to replace the few s5's I still have in my farm. What did stop me was Bitmains latest 1-fan batch...
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