80dB might be a slight exaggeration but i mean very slight, i get 74dB on smaller units and i think the S5+ was around 76dB and is a similar heat density form factor. So yes, with the echo you'd be very close to actually observable 80dB, probably just under and also the fans i have, since they seem to use very similar or just the same fan for S4, S5 (that i can tell so far) they also have a high bitch noise. Just to make it even worse. Just don't expect anything under 70dB. For home mining, this is very hard, since you pay a lot for your electricity, BTC is volatile and there is a reward halving coming. You would have, at the very least to turn them off during peak hours at all cost. A while back i might of told you, again, the Antminer S5 modded to make less noise and put it in its own room or something but now the difficulty has started rising again so you're kind of stuck in Limbo at the moment. If the S7 was 30% cheaper i'd tell you to get that. You,re gonna have to do the math yourself, but with the added problem of downtime because of the peak hour cost... :S I can't recommend you anything. For the Dashboard.Check current mining Dashboard and popular pool/monitoring sites. I mentioned Minera before, its a linux distro that run on a RasPi. You don't need it for any mining but its dashboard is functional and practical even though commonly used (i think it use some open source dashboard) but i will let you figure that out. Basically get your inspiration by checking out other practical dashboards. I'm sure some other members could throw in some links... Right? Guys? Hello? Anyone else willing to contribute?  So an S5 or two for the on-campus pieces? That sounds do-able. To keep it "within curriculum" I'll have to add some sort of hardware stuff like temp sensors being read from the Pi instead of the built-in ones, voltage readouts, etc. That's where it gets difficult since my experience with programming isn't very high, but the ADC (analog-to-digital), sensors, etc. I can handle. Any help from anyone would be awesome. I see, that would be pretty cheap to be fair, since the built in miner report the temps and you can use the cgminer API to display the temps and it would not be much work worth being gratified over; https://github.com/ckolivas/cgminer/blob/master/API-READMEHowever you could use external sensors and it being display on some small LED screen. Or something. Otherwise having the RasPi read the Temp is the same as reading it from your Antminer webserver, after all the software that would run on the RasPi would do it the same way the webserver does. But; trying to use an AntMiner over a RasPi is in a way kind of a pain, since the Antminer is self sufficient and would not run off the miner application on the RasPi. Personally i run M's Miner Monitor on Windows and it monitor the miner over SSH, so that's another thing you should check out, but you'll have to more clearly decide how to make it fit in your curriculum and what your setup will be. Ultimately the easiest way to do this would be to simply run a USB stick miner on a Rapsi and then maybe "engineer" some led screen to display the temps being read from the miner's API. For the purpose of your curriculum its not any less or more than getting a real miner that actually make you some money. (Check Sidehack's usb stick) But of course since you want to make some money off of it too, check out the Antminer S3's. Also check out the S1, undervolted with simply a graphite pen would probably give you the cheapest quietest unit that will earn you a bit of money. |
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Yes that sound correct, tho sometimes you're out of FIAT and buying a coffee or some groceries with BTC is just joly. While some merchants may want to wait for a confirmation before releasing the product, it is not always required. For instance, doing a double spending attack on a coffee shop would be pretty pointless. Doing the attack is not free.
This means that the seller only need to wait for the TXID to propagate which takes a second. This effectively mean you can go to a coffee shop, scan the QR, click send BTC and a moment later, the seller see the TXID on the blockchain and can give you your yummy coffee at little risk. After all, if the merchant take Mastercard, he is going to be paying a fee and a BTC tx fee of 1-3cents is cheaper.
It sound fairly competitive with the other payment processors IMO.
And i like that you mentioned that it is possibly even best to owe FIAT. While that may or may not be the case, since it depend on the interest rate... Overtime, the value of the Fiat currency inflate, which mean you effectively owe less. Clever.
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Something that won't blast enough noise to make you deaf if you stay next to it for extended periods of time (Seriously). Maybe a couple of S3's if you want a good unit that won't be too noisy, is fairly cheap and ultimately would be a good ROI since the S7 is insanely expensive per GH/s, its only upside being the lower power consumption(Which is not an upside to you).
S5's are good too, louder than the S3 but more manageable with aftermarket fans. Regardless, either way you'll be generating as much heat as a oven so you probably know better than me what you can fit and what you can't. Just gotta keep in mind the heat dissipation.
In a nutshell, less efficient units are more advantageous to you. Personally i'd get S5's. With free electricity they should ROI in 4~5 months.
That's actually a valid point now that I think about it, high W/GH aren't going to be in as much demand anymore, so that would dictate a drop in price. Heat shouldn't be a concern either, that part of the building is usually less than 20 degrees C no matter the outside weather and sticks pretty close even in the full classrooms with all our gear going. Is 80dBa an actual observed level on those? Good god, that's blasted loud. Don't think the girlfriend would let me get away with that one at home either. This advice might have saved me an awkward purchase. Slightly OT but what would be a good unit for at home? I'd like to keep as much GH/s on hand as practical because I'm a gambler and the fact BTC price is low right now and with the reward halving coming up "soon", I kinda wanna rack in what I can at the moment. That probably sounds insanely dumb, but that's what's been in my head. Back on-topic: Once the unit(s) been chosen, what would be the best method in going about putting together some sort of flashy UI/infographic display? 80dB might be a slight exaggeration but i mean very slight, i get 74dB on smaller units and i think the S5+ was around 76dB and is a similar heat density form factor. So yes, with the echo you'd be very close to actually observable 80dB, probably just under and also the fans i have, since they seem to use very similar or just the same fan for S4, S5 (that i can tell so far) they also have a high bitch noise. Just to make it even worse. Just don't expect anything under 70dB. For home mining, this is very hard, since you pay a lot for your electricity, BTC is volatile and there is a reward halving coming. You would have, at the very least to turn them off during peak hours at all cost. A while back i might of told you, again, the Antminer S5 modded to make less noise and put it in its own room or something but now the difficulty has started rising again so you're kind of stuck in Limbo at the moment. If the S7 was 30% cheaper i'd tell you to get that. You,re gonna have to do the math yourself, but with the added problem of downtime because of the peak hour cost... :S I can't recommend you anything. For the Dashboard.Check current mining Dashboard and popular pool/monitoring sites. I mentioned Minera before, its a linux distro that run on a RasPi. You don't need it for any mining but its dashboard is functional and practical even though commonly used (i think it use some open source dashboard) but i will let you figure that out. Basically get your inspiration by checking out other practical dashboards. I'm sure some other members could throw in some links... Right? Guys? Hello? Anyone else willing to contribute? |
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I personally would not invest anything in cloud mining companies, since they all end the same, or is a ponzi, or scam, or simply disappear. No such product can offer no guarantee of anything, there are today, not tomorrow. For many operations you do with the ROI in the end not recover.
No one doubts the legitimacy of Hashnest. On October 10 GH/s of the most power efficient bitcoin miner ( Antminer S7) will be available on the Hashnest internal market. You can buy now as pre-sale to hash but you would have to buy hash equal to one S7 for $1900. Indeed the issue in the case of Hashnest, a.k.a. Bitmain's cloud mining service, is not legitimacy. In fact, i'm pretty confident all hash and PacMic will be brought to term in the future just like it did in the past. Naw the problem with Hashnest is that you're basically buying Bitmain more hardware so they make more money and in return you get very low APR. Meanwhile they make 10x the profit you do and you feel happy because somehow you're maybe paying them less for hosting than you would pay at home. The hashmarket is where you can make more money, but probably more by trading than holding hash. If you make money by owning hash, sure thats likely, but you also hold the risk. If you don't want to hold the risk then you can go for a PacMic and err well. Not get much profit. And then there's the other Cloud services which are probably even worse and may disappear or scam you. Bottom line, Cloud mining hosting is expensive as hell, its not because its cheaper than your extremely high electricity cost at home that its a good deal, so beware and invest wisely. |
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Well you sound a bit more related to hardware and electronic, i don't think cheesing your way by using some dashboard like Minera would be showing much effort. But you could do it and then plug your section of text.
Regardless, if you use a pool that give you an api, typically you will need to make a webserver that will read the API and display them nice and pretty, but this is more software and web work, which seem a bit out of your "curriculum".
Anyways, if you get more precise with what you need as help, maybe i and others can help, but i think the most important thing i can tell you right now is that a S7 is incredibly loud.
Make sure a sound blaster at 80dB is actually something you can run on campus without driving everyone nuts and getting expelled. I don't see much upside in a S7, especially if you won't be counting the electricity as a cost.
I've got a webserver for other personal projects that's got all the necessary abilities, so that's already taken care of, and the sound shouldn't be a factor, it will be in basically a glorified closet with a display window that's used for nothing more than showing off the engineering department's projects. It's attached to one of the most heavily trafficked hallways, so again, shouldn't be a factor. I was going to get an S7 anyway, but I figured the free power was cool. At home I get $.075/KWh and +$.15/KWh during peak hours (about 35% of the time). What would be a better unit to stick in there on campus in your opinion? Something that won't blast enough noise to make you deaf if you stay next to it for extended periods of time (Seriously). Maybe a couple of S3's if you want a good unit that won't be too noisy, is fairly cheap and ultimately would be a good ROI since the S7 is insanely expensive per GH/s, its only upside being the lower power consumption(Which is not an upside to you). S5's are good too, louder than the S3 but more manageable with aftermarket fans. Regardless, either way you'll be generating as much heat as a oven so you probably know better than me what you can fit and what you can't. Just gotta keep in mind the heat dissipation. In a nutshell, less efficient units are more advantageous to you. Personally i'd get S5's. With free electricity they should ROI in 4~5 months. |
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I highly recommend you invest in a solid hardware wallet to store that BTC. I wouldn't leave it on exchanges, since well, you never what can happen. Hacks, Mtgox, etc.
Anyhow, make sure to read on cold storage, wouldn't want to lose that 57.5k USD would you?
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In talking with one of my professors, it turns out I could use power on campus **FREE** if I could somehow turn it into a project that relates to the curriculum. Since I'm in the electronics/electrical engineering department, I figured something involving a Raspberry Pi and a display of some sort showing hash rate, a couple other impressive numbers of some sort, amount of BTC earned per day/total, operating temp, voltage, etc. of the device, along with a little informational text block about Bitcoin in general.
I plan on buying one of those fancy new S7's for this purpose, since at a 0 electricity cost and climate controlled very well, it could ROI by the end of the school year assuming I got it sometime before the end of October. However, I'm no expert at using the API's provided by many pools, exchanges, etc. and would like some help trying to figure out how to get started on this. If I get the help, I'm willing to share some, back to those who helped me get free juice.
Thanks, y'all.
Well you sound a bit more related to hardware and electronic, i don't think cheesing your way by using some dashboard like Minera would be showing much effort. But you could do it and then plug your section of text. Regardless, if you use a pool that give you an api, typically you will need to make a webserver that will read the API and display them nice and pretty, but this is more software and web work, which seem a bit out of your "curriculum". Anyways, if you get more precise with what you need as help, maybe i and others can help, but i think the most important thing i can tell you right now is that a S7 is incredibly loud. Make sure a sound blaster at 80dB is actually something you can run on campus without driving everyone nuts and getting expelled. I don't see much upside in a S7, especially if you won't be counting the electricity as a cost. |
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Hmm yeah i wouldnt blame the BTC drop on XT. Sure the scaredy kitties might of dumped because of unfounded fears but i don't think the big BTC owners are that weak. XT didn't gain momentum, only FUD.
If such little FUD made the price drop so much, then we were over BTC's true value for sure. There is no need to worry about BTC price dropping over FUD and it was far from a civil war. It was just a loud mouthed minority causing a lot of waves and spam.
its not so much XT per say its this whole block size issue poeple find out bitcoin is not the limitless "money of the future" they thought it was - sell then they find out no one is sure what to do about scalability - sell then they find out gavin has left the dev team, to work on XT the solution to our problems - good news? maybe buy a little then XT is a major flop, which seems to be the act of gavin coding with e NSA pointing a gun to his head - sell sell sell 2 of the best devs basically quit - sell? then 100million ideas all kind of similar pop up, fears of bitcoin splitting in two set in - sell bitcoin splits into BIP100 Vs BIP106 silly silly - sell everythingBut there is absolutely no reason for this to happen, only people that don't know how Bitcoin work can be worried about that. You need consensus to change and consensus is not going to happen without the Bitcoin expert agreeing with the change. This pretty much mean. If it is not; 1-Absolutely and immediately necessary. 2-Absolutely the right thing do to. Then There will be no fork. None, at all, zilch. People need to stop listening to FUD and drama. But obviously the people that own the hash power aren't, because how many blocks did XT solve? Enough said? |
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Personally I believe there's going to be some more Acic companies coming out next year. It seems like there were a ton then they all went bankrupt now they're coming back.
If new or old companies come back, Bitmain will just swat them down like they did last time with the S5. If you were hooked in at that time, you'll remember S5 being rushed, lower quality than S3's and sold to undercut all competitors. Then later on, they more or less fixed it and brought back the ability to down volt. But err yeah. Bitmain has such a bit chunk that i'm pretty sure they will make sure to swat down any competitors that try to sell to the public. |
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Hi is there anyone that can help please. I followed the instructions from the Electrum link on the alpha bay website to get bitcoin running . When I download python it installed by itself also the zip file can't be moved to sl4a. After that things get even more complicated. If there is a UK member that could spare me a few minutes on the phone to talk me through the process I would be a very happy man .Thank you in advance
What are people saying is. Normally you just plug the S5 in. Then connect to it using its IP in your web browser. Then you go to configurations, change the pool settings to your own and done. For whats setting up a wallet, i'd go with GreenAddress or Multibit but, what OS do you have? |
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I offered to sell one for 0.1 BTC but he was looking for a freebie.
Same. He told me in private he was expecting me to give it for free. Then i told him helping him get a S7 "slightly cheaper" didn't mean "giving you a coupon for free". Moving on. |
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Hmm yeah i wouldnt blame the BTC drop on XT. Sure the scaredy kitties might of dumped because of unfounded fears but i don't think the big BTC owners are that weak. XT didn't gain momentum, only FUD.
If such little FUD made the price drop so much, then we were over BTC's true value for sure. There is no need to worry about BTC price dropping over FUD and it was far from a civil war. It was just a loud mouthed minority causing a lot of waves and spam.
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You mentioned paying nothing or renew energy,soo why would someone with such potencial buy such thing that will allow to roi but wont get more then we could get with faucets or others ways to collect bitcoins?I doubt any big farm with huge low cost energy and solar will invest some bucks into those sticks instead a better equipment .
I suppose it depend on how big you're talking about. For actually big farms, they usually have sections of a specific miner since its easier to manage all the same miner than a bunch of different miners rag tagged together. However for 100-300THs in someone's garage, whatever you get your hands on at good GH/$ would do. Me i'm even smaller than that so its easy for me to use different hardware but anything bigger than that. I can't imagine they would want to get small units or different units. Indeed. But for solo mining, this is exactly what you should use. |
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hopefully not.. i prefer bitcoin with own currency, dollar will be dollar.. better stay like this
I think this as well, let the dollar by itself whether it crashes or not, bitcoin is going to be a parallel money and online payment system. finally people that also think bitcoin is just an alternative to fiat currency. people who think bitcoin will replace fiat aren't thinking in a realistic way. there is nothing wrong with bitcoin being just an alternative. Bitcoin is not an alternative to fiat currency it can work and does work along with fiat.Bitcoin is useless in small transactions.You need physical currency to accomplish some deals But for small transaction on BTC you can use internal ledgers. If mainstream adoption of Bitcoin come, that will not be a problem since already widely used services like Coinbase can let users send and receive payments without actually going through the BTC blockchain. This require centralization of accounts but if it become government controlled, -in the case where a currency is replaced by BTC this will be an absolute requirement-, then that will not be a problem. |
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XT is an other client to connect to Bitcoin network.
Like other SPV wallet ...
the thing is that not really all member have read the changelog of this software.
special tuning is attend and work better than STOCK version.
like the MOD in the emule environment.
XT was a replacement for Core, not a SPV wallet that run on the current block chain. They wanted to make change that would require a hard fork and that is no way anything similar to "just another SPV wallet". |
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I would love to see how high you can overclock the unit while keeping the stock 590w~ consumption. And then find the most efficient speed that consume 450w~ per S5.
My guess for 590W would be to get close to 400MHz with 11.5V giving 1320GH? At 450W the closest measurement I have is at 300MHz with 10.6V Supply (Core Voltage 0.741V) 400W at the wall giving a Hash of 990GH and 0.404J/GH. I could not push it any higher as I felt I was at the limit of the Meanwell 5V PSU/s, but I am sure that 1TH would be possible with 450W.  Rich At 400Mhz i have hit diminishing returns. Oddly enough the HWE% does not raise by much, only by <0.001%, however i only get a 5gh increase up from 393.75mhz which is 34GH/s up from 387.5hz. I tried pushing it even further up. At 425hz i had 1.355Th/s for 692Watts and at 437.5 the hashrate dropped to 1.2TH/s, consumption 714watt and HWE% 0.3%. So i am not sure what is causing the hashrate drop. But it is not proprotionate to the HWE%. Since then i found a trick to keep both board at about the same temperature, i just use a piece of paper to direct air from from a box fan vertically through the "fins" in front. I may try again during winter with low temps. But i don't think that is the issue since 60c does not seem that higher to me and the temp was not any higher than the few previous clocks. I wonder if in your research on the 1.91v you will be able to understand why the S5 behave this way at higher clocks? |
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I would recommend finding deals that you can break under 5 months including everything. You must include the PSU required if you do not have one, the shipping, the import fee, the time delays, the wiring and cooling. You must also include difficulty increase in that.
If its more than that, your electricity cost is probably too high and thus sound risky but not impossible. Got to keep in mind a block halving is happening next year as well.
If you give me/us more information on your situation, i/we may be able to better help you, OP.
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Hello,
I wont order a S7, but the price is very high. Can anybody spend a 100$ Coupon to Order a s7 a little bit cheaper?
Best regards from Germany
Willi
Sure, check your PM, see if we can work out a deal. |
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The Canada group buy should be arriving destination very soon! If its on track, maybe the sub shipments can start being prepared by next week. And once you receive your stick, i invite everyone to take a look at the Sidehack stick pool club; https://bitcointalk.org/index.php?topic=1177508.0 |
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So let's take stock on where we are on the project? Underclocking and Undervolting has proved possible on two S5 Miners with V1.91 Hash boards. There are differences in performance between the 4 boards tested which needs to be understood at some point. Improvement in J/GH is possible at all Frequencies when you have the ability to adjust the voltage. This includes the Standard Frequency of 350Mhz where the voltage can be reduced from 12V to 11.1V reducing the Watts at the Wall from 568W to 510W and improving the efficiency from 0.492 J/GH to 0.442J/GH Best efficiency with reliable starting and operation was at 150MHz, 9.4V supply (Core Voltage 0.63V) consuming 166W at the Wall giving 495GH with an efficiency of 0.335J/GH. Best efficiency seen by winding down the voltage after hashing had started, but not sustainable was at 100MHz, 8.4V supply (Core Voltage 0.56V) consuming 97W at the wall giving 330GH with an efficiency of 0.294J/GH. I feel that I have not yet found the best solution to an efficient, cost effective variable voltage PSU. Best that I have is 2 x 5V Meanwell PSU's in series. These give the full adjustment range needed for undervolting, but are a little low on efficiency at 82% and also a little low on power as they can only be used up to 300Mhz. The DPS 600 Server PSU allowed adjustment of the output voltage from 10.6V to 12.25V but was disappointing, as when the voltage was reduced so did the power available. I have also tested the DC-DC Buck Converter that Phil identified, on the output of a 12V Server PSU. The efficiency was extremely good at 96% however they were only good for 10 Amps as after that the load regulation was poor. However the voltage adjustment range was good and they are an option for lower power on a single S5 Hash board. (More detail available if people are interested? So what next? I think the fun is now over and I need to knuckle down and work out why the V1.91 can be undervolted and the earlier versions can not? Once that is understood I want to explore if it's possible to improve on the results I have and if there is a way of enabling the earlier versions of the Hash board to be undervolted. When I have worked up the detail I will describe the differences that I have found between the V1.91 Hash Board & the earlier versions and will welcome any inputs as to the role that these play in enabling undervolting as a prelude to the next stage of the project. Watch this space... Rich Hmm indeed, personally i would like to find high quality PSU with easy variable volt control. I would sure love to see EVGA G2+(or such quality) with a led display and a turn knob that let you downvolt. If not then a higher powered PSU that runs 10-11.9v since those are the range i am interested in. I would love to see how high you can overclock the unit while keeping the stock 590w~ consumption. And then find the most efficient speed that consume 450w~ per S5. Personally i would want to run 3 S5 per 15a 120v breaker and this project can make it happen, tho obtaining specifically 1.91v's may prove challenging. Meanwhile i hope you get to understand the 1.91v better, maybe it could lead to better volt control, then again maybe not, circuitry is above my paygrade. |
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