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1  Bitcoin / Mining / Re: Free electricity / low fee hosting farm on: August 28, 2015, 03:13:41 PM
Let me pipe in here, mostly about your electrical capacity. Here is an example with my 1MW mine, ability to support about 1500 S5. It is a 1200Amp 480V  service. I need large transformers to step the voltage down to an appropriate level for the power supplies. For local jurisdiction code where I am at it requires overcurrent protection before and after the transformers. All of this adds significantly to the electrical infrastructure.  I would not want to work in a mine without this protection.

Here is a great demonstration video of an overloaded transformer:

https://www.youtube.com/watch?v=pCZax3vIslo

That's molten plasma metal being sprayed everywhere. Dig deeper into youtube searching arc flash for scarier videos with fatalities.  Undecided
2  Bitcoin / Mining / Re: Miner photo 'porn' on: August 23, 2015, 05:34:49 PM
How did this get to page 2?  Huh



There's the other 500KVA coming online. Under construction please don't mind the mess.

I'll announce here I plan on bringing a 4MVA/20k sqft facility online by the end of the year.  Shocked
3  Economy / Computer hardware / Re: World biggest bitcoin /SHA256 miner 7.7T@3400W on: August 12, 2015, 03:32:32 PM
That automatic wire cutter stripper crimper machine is just too badass I want it. Looks like it takes a bit of setup to get it running. Thanks for the link!

I prefer the 2880w power supply mainly because it is modular with the breakout board, and that allows me to select the awg of wire to use for the pci-e cabling, the length, and reuse it in case of a dead supply.  It is extremely efficient compared to almost every other power supply, does not get very hot, and has 3 fans to cool so if one dies it wont. Add in the fact they are available in the states in bulk shipped for less than the cost of the breakout board.

I think just one of these 2880w power supplies could power one s5+, even at standard clock. Right now my farm is powering 5 S5 per 2880w power supply and my metered pdus are reporting about 3300w being consumed. I may order one up just to test.

This is what a 6 2880w / 30 S5 readout looks like on one of my pdus: http://i.imgur.com/JTw7HZ0.jpg
4  Economy / Computer hardware / Re: World biggest bitcoin /SHA256 miner 7.7T@3400W on: August 12, 2015, 01:16:01 AM
This is one goofy contraption.  why the obsession with PCI connectors?  Is that really the best solution for industrial scale mining?  

I prefer it greatly over a proprietary power supply. High end efficient used +12V server power supplies will beat new every time, not only in price but performance as well.

Buy yourself an automatic wire cutter/stripper machine, some 5000ft spools of 16awg primary wire, reels of crimping pins and bags of end connectors. And you will never have to buy a PCI-E cable again, and you can make them just the length you need.


not sure that would be very good for my 2 MW facility.  that is a shit ton of work!  

I priced it out and with my 1 MW facility it would have added at least 100K USD to the overall build out cost. I'm willing to do a lot of work to get that. Most of that would be in the overpriced power supplies that are bundled with the miner making the overall cost per ghs that much more. Saves money ongoing because I can guarantee you my server power supplies are more efficient than say the ones in a S4. 1-2% savings of 1 MW let alone 2 MW will add up quick.

The key is the automatic wire cutter stripper machine: https://www.youtube.com/watch?v=3vb0RM1xMCw

I liked the screw terminals of the S1 but the plug and plug of pcie on both ends using the breakout boards allows for easier swapping of equipment. Which, when mining on an industrial level that is pretty much an ongoing task.

Older pic showing clean pcie install: http://i.imgur.com/E6Ju4Us.jpg

EDIT:

http://i.imgur.com/F4ylA08.jpg
http://i.imgur.com/mi2T3Tt.jpg

Also don't forget the modularity it has in that it allows us an upgrade path to new hardware without having to buy the power supplies all over again.
5  Economy / Computer hardware / Re: World biggest bitcoin /SHA256 miner 7.7T@3400W on: August 11, 2015, 08:30:40 PM
This is one goofy contraption.  why the obsession with PCI connectors?  Is that really the best solution for industrial scale mining? 

I prefer it greatly over a proprietary power supply. High end efficient used +12V server power supplies will beat new every time, not only in price but performance as well.

Buy yourself an automatic wire cutter/stripper machine, some 5000ft spools of 16awg primary wire, reels of crimping pins and bags of end connectors. And you will never have to buy a PCI-E cable again, and you can make them just the length you need.
6  Bitcoin / Mining speculation / Re: Entering the bitcoin mining game need advice! on: August 07, 2015, 03:54:56 PM
It is easy to find out yourself by some simple math. Those numbers change all the time so you can ask the question and the correct answer may only be valid for a very short time.

You can assume a S3 burns what, 600watts? so .6KWH for every hour it runs.

.6 X 24hours a day X 30.5 days = 439.2KWH X .10 = $43.92 per month in power costs

Now go here:

https://bitcoinwisdom.com/bitcoin/difficulty

Put in 450GHS and you will see it reports .129btc per month or 35.69 in usd at exchange rate of 275. Keep in mind these numbers reported are generally 10% over what is usually achieved after you factor downtime, orphans, and other unforeseen factors.

So you can see at .10kwh you will be paying around $10 a month to run your s3, given the price of bitcoin and difficulty stays flat (which it wont)


7  Bitcoin / Hardware / Re: Bladecenter H 2880W Breakout Boards. First batch closed, now selling from stock on: August 05, 2015, 08:04:13 AM
Well I'll be a monkeys uncle. I must have gotten lucky then your prototypes must have been before that first batch. Good info to know if I ever have this issue.
8  Bitcoin / Hardware / Re: Bladecenter H 2880W Breakout Boards. First batch closed, now selling from stock on: August 05, 2015, 07:36:48 AM
I have had about a 96% success rate in these used power supplies. I have yet to have one of these breakout boards go dead. Even the prototypes I received back in December are still ticking strong and have many hours on them now. The breakout board has nothing to do with the fans at all, that is all done inside the power supply.

So if you see one light with the power switch flipped to off, then when you switch it on you see two green lights, and still have no fan - it is most definitely the power supply.

Well, I had a few of mine do what you said, made the proper solder connections on the breakout board and everything is just fine now.  Meaning it was not the power supply.  Be careful of making flat statements.

I'm not saying this to discredit the breakout boards at all.  I absolutely love them!!!  I just thought the record should be set straight.

If you have had this problem you should elaborate exactly what you had to solder to fix your breakout boards for the previous poster that is having this issue, instead of just telling me I'm wrong. Nothing is really accessible anyway. I'm curious exactly what traces you are correcting. J4bberwock can easily confirm if a defect in his board could ever precipitate this issue. Out of the 68 boards I have been running for over 6 months now I have had no issue with any of them in any case. I just paid for 50 more.
9  Bitcoin / Hardware / Re: Bladecenter H 2880W Breakout Boards. First batch closed, now selling from stock on: August 05, 2015, 01:21:48 AM
I have had about a 96% success rate in these used power supplies. I have yet to have one of these breakout boards go dead. Even the prototypes I received back in December are still ticking strong and have many hours on them now. The breakout board has nothing to do with the fans at all, that is all done inside the power supply.

So if you see one light with the power switch flipped to off, then when you switch it on you see two green lights, and still have no fan - it is most definitely the power supply.
10  Other / Meta / Re: Self Moderation should not be allowed in the hardware subforum on: August 04, 2015, 11:36:12 PM
I'm thinking for someone new here, the most vulnerable, won't appreciate or know the difference one way or the other. These people prey on the naive and self moderation in the hardware subforum serves as a great conduit to market their con.
11  Bitcoin / Hardware / Re: Bladecenter H 2880W Breakout Boards. First batch closed, now selling from stock on: August 04, 2015, 11:13:58 PM
So I bought a couple of break out boards a few months ago and it seem they are not working now? The fans on the psu wont spin , I thought the psus were bad ( 2880 IBM ones )
But I got two brand  new psus off eBay and its the same deal, first two green lights go on
Psu starts to get super hot BC fans wont activate

I've tried sp20s ants 🐜. Any ideas?



The PSU's can go bad but they are pretty stout. I had an on/off switch break off when I dropped one from 10 feet. I bent and jammed a paperclip in the remaining switch to short the pins to turn it back on again.

One of those green lights tells you the AC power is on, the other will tell you when DC power is there, and that will only happen if the power supply is good and the switch on the back of the board is flipped on.

There are two orange lights for a voltage error and a fan error, I have never seen any of these lights activate yet.  If both AC/DC power lights are on but fans are not spinning I would say the fans are dead somehow. There is a part number for just the fan replacement but the power supplies are already so inexpensive its probably the same cost just to get another power supply.


12  Other / Meta / Re: Self Moderation should not be allowed in the hardware subforum on: August 04, 2015, 09:04:01 PM
So you think we should get rid of self moderated threads. So we should just do what you think "just cuz"? Care to, I dunno give reasons why this is a good idea, or should we just take your word for it and change something that has already been debated extensively because you don't like it?

I'm only stating my opinion, and again, I am asking for this only for the hardware subforum. And again it would not have to be elimated, but maybe applied for when the need arises. You can keep your marketplace forum as you want. The hardware subforum should be held to a higher standard. I already stated a very valid reason: just look at the self moderated cloudthink.io scam thread ongoing there.

Yes you can post in scam accusations but the ones that need that kind of help are the ones most likely not to know that subforum is even there.

I can see a point that the person is asking to be stolen from for being that stupid, but I will never agree that the scammer deserves the proceeds. Unchanged we will see them use this method yet again.
13  Economy / Service Discussion / Re: ETHICAL PROBLEM WITH BITMAIN on: August 04, 2015, 04:39:56 PM
I can say with large lots of units, it takes more than a few days to weed out the bad ones. If they are just plain dead that *is* pretty easy to troubleshoot, isolate, and prepare for warranty repair. But most of my faulty units have been intermittent out of box, quickly deteriorating from that state to only one hashing board will be online. It takes alot of monitoring to find these in a large lot. In addition I reseated the faulty hashing boards to try to wake them up again, and was successful half of the time. But this step requires monitoring all over again to check the results of your work. It takes a good 24 hours or more of hashing to get a good reliable reading.

Basically all I am saying here, is it took me a whole month to weed out the bad hardware for warranty repair.
14  Other / Meta / Re: Self Moderation should not be allowed in the hardware subforum on: August 04, 2015, 04:03:25 PM
I think it depends on what the content of the thread is. A company should be able to clean up its own threads when required (ie Spondoolies deleting some racist stuff) and its not as if someone can't start a mirrored non moderated thread alongside it. Editorialised threads with an agenda however, shouldn't.

I can agree with that, but we are far enough along the timeline of bitcoin, that a company specifically in the business of producing mining hardware should ask a mod to 'promote' the thread to that level. Or better yet, mods should have the ability to remove the self moderation for obvious scam attempts. We are past the time when bitcoin hardware manufacturers are starting in garages with similar resources. We prepare the ground as too fertile for scammers. Case in point which has me posting this: Cloudthink.io's obvious scam they are pulling in the hardware forum. Yes anyone with a little bit of research will see these guys are full of it, but we shouldn't allow them a platform they can use to sucker newbies and censor their whistleblowers.

This subject has been debated to death. If you think some one is scamming, make a post about it in the scam accusation area, or leave them a trust rating. Self moderated threads are unfortunately needed here because trading here is like trying to do business on 4chan, and the mods rarely give a shit about people trolling marketplace ops.

I can see other subforums the ability to self moderate would come in handy. I think the hardware subforum itself should be held to a higher standard. I think it is moderated quite well with mods there, for good reason, it needs it.
15  Bitcoin / Hardware / Re: Cloudthink Basic Check on: August 03, 2015, 08:08:18 PM
Just posting here what got deleted out of the self moderated topic.

A reply of yours, quoted below, was deleted by the starter of a self-moderated topic. There are no rules of self-moderation, so this deletion cannot be appealed. Do not continue posting in this topic if the topic-starter has requested that you leave.

You can create a new topic if you are unsatisfied with this one. If the topic-starter is scamming, post about it in Scam Accusations.

Quote
Quote from: pekatete on Today at 06:25:32 PM
Could you please ask your gullible potential reviewers to stop spamming the hardware subforum with review threads that are clearly NEVER going to happen? I mean, even though they still hold hope of getting a FREE 8Th/s rig, could they hold fire until they receive one before spamming?

I can not call this a scam, 'cause its a mere request for reviewers for a last-gen rig "released" on the cusp of new-gen hardware hitting the market, but the gullibility of some supposedly reputable people on the forum is eye-opening to say the least.

Amen brotha! Disappointing to say the least but it shows the community is hungry for new hardware. They only need appear legitimate for a short time to make their scam effort pay off.

Let me wager a guess here that these 'selected members' have been requested by the OP to do just this. They should be embarassed for helping enable this ruse.
16  Other / Meta / Self Moderation should not be allowed in the hardware subforum on: August 03, 2015, 07:20:11 PM
Well its all in the subject. Apologies if this has been discussed before, and feel free to trash it and point me to a bigger thread and I'll bump it in affirmation.

It should be obvious why this is not such a good thing for this particular subforum.
17  Bitcoin / Hardware / Re: CloudThink.IO NEW 8TH/s Imperator Bitcoin Miner - Apply for a FREE test unit on: August 03, 2015, 06:07:24 PM
Can you provide pictures of your S5's or SP31's mining? Apologies to any UK miners out there but the UK seems to be the haven for these kinds of scams. You told me in my PM it was not possible to pick these miners up in person.

It is only possible to pickup Imperator Miners from or UK Headquarters but only for testing purposes.

Anyone here reputable in the UK wanna take that offer up? I'll offer .5BTC to a verifiable independent bct user to go and visit and verify ala BFL style.

But really, without any pictures showing the mass of hardware they would inevitably have and should be more than happy to brag about.. I'm sorry to even post to drag this scam out.
18  Bitcoin / Hardware / Re: CloudThink.IO NEW 8TH/s Imperator Bitcoin Miner - Apply for a FREE test unit on: August 03, 2015, 05:59:01 PM
Can you provide pictures of your S5's or SP31's mining? Apologies to any UK miners out there but the UK seems to be the haven for these kinds of scams. You told me in my PM it was not possible to pick these miners up in person, and you told me you had 64 of them, not 30.
19  Bitcoin / Hardware / Re: CloudThink NEW 8TH/s Imperator Bitcoin Miner - Apply for a FREE test unit on: August 03, 2015, 05:44:02 PM
Warning people. They will not let you pick up supposed hardware in person, which is the biggest red flag for me possible. Has it been revealed where they are located yet?
20  Bitcoin / Mining / Re: Miner photo 'porn' on: July 27, 2015, 08:02:52 PM
The motor was actually bought new, I used California electric rates so people can relate better, actual cost of running this motor will be closer to $250 per month. The farmers up here would quickly go out of business if they had to pay a much higher rate. I am in central Washington.
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