Thee is no failsafe in the miner for that. What you can expect is very short PSU life, increased HW errors and dropping ASICS (x)'s possibly entire board, requiring a hard reboot (cycling the power). In short - don't do it. For reference, at stock speed my s5's draw 630w from the wall with Gold PSU's.
It's a bad idea to get less then needed or just enough. If you are dead set on it for some reason lower the running speed. To do this long term is not a solution unless you run at lower freq. I suggest getting a decent PSU that matches requirements. They actually hold value decent. So you can sell it after your done, or you might use it with another miner possibly. Although server PSU's have started to take over. |
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I have what you might call a "little server" in my home "basement." I changed my fiber for this one patch cords and since them my mining has been restrict, I do not know if the change of the patch cord could be related. To figure out if the cable is right, you need to know what GBIC's/what type of fiber transceiver you got. Is it singlemode or multimode? Was the old cable yellow? I'm guessing you got it right if you get a signal at all. Did you by any chance touch the tip of any of the fiber-tips with your hand? If yes, you could be experiencing packet loss. Do you get packet loss if you ping 8.8.8.8 or 8.8.4.4? I'm just throwing stuff out there, I don't really understand your question.  We just don't know is the problem. Question is its not working what should he do. So question is clear, but so many varibles we cannot give any good speculation on why. And as Leo mentioned fiber is overkill on most miners operations. So not a lot of questions about it on here. OP would have a easier life just using a standard network with CAT5 or something, his miners would never suffer from not having fiber. |
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You should try faucet
faucet it's free but not fast because faucet give small results. Actually faucets aren't free at all. You are actually working for those little satoshis you will earn on faucets. Its some sort of captcha typing work that has a long time interval. Have you seen a faucet without any captchas to solve before claiming? Probably not  essentially all of the free is to be a bit of work. no one really wants to give without working, even on twitter giveaway you need to click retweet lol Haha indeed, I just don't agree those who say that you can get "free" bitcoins on faucet. Even though its a very small work to solve captcha, its still an effort to do so. So basically, there is nothing in this world which is free So why not work on captcha solver ? both is about solve the captcha to get free bitcoin. because i think solve captcha is more more pay than faucets. you even earn 0.01++ if you can type fast. Becuse most pay so little it is not worth it. And if it is worth it they should have security in place to stop bots. They will notice if thousands of transactions are botting them most likely. So I suggest learn a skill or something to sell instead of trying to beat a faucet for pennies. |
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Or look into hardware wallets. They truly are a nice thing to have if your going to use the address a lot. Just adds a lot more security some are so secure even if computer is compromised you are still safe (as long as you did not do something stupid like save seeds on PC). And there is paper wallets for if you truly are not going to touch the BTC. Just make sure to do it properly. People should be using those two options a lot. |
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One heatsink in a b7 I have fell off when moving the miner to a diff location.
Could I potentially buy a small adhesive rPi heatsink to replace it?
I was told the following by Sherri. If it's not done right, you risk burning the chip. " Carry and setting gently when assembling the hash boards. Since the heat sinks are glued on the hash boards directly(it is not firm enough), they can easily knocked off.
If there have heat sinks drop out from the hash boards ,please do not use it any more and contact us asap! You cant fixed it in your side or the warranty will be void！
If the boards are burnt due to lack of the heat sinks ,you need to cover the repair cost."If you do it your side you give up any warranty. So I personally would contact bitmain and see about RMA on the 1 blade. It does stink on downtime.... but if they see you tried to repair it it's hard to tell what they will charge vs free. I would use the warranty. If you were out of warranty I would look for solutions like you mention. But I think risk vs reward is to great with intact warranty. |
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You have a few options for cooling.
If I recall, Morocco tends to be dry - in which case "evaporative cooling" is DEFINITELY an option to investigate.
Mechanical cooling (aka Air Conditioning) will cost you appx. 20-25% (depends on the efficiency of the A/C unit) of the amount of electricity you use for your miners.
Fan cooling via massive airflow doesn't work so well in hot (high 20s C and higher) temperatures, if that's your only option PLAN to underclock (and if possible undervolt) the units to be ABLE to keep them cool enough to operate.
Given all of the factors above, I doubt you will be able to profit enough with an S7 to be able to pay back the cost of buying one, even if Bitcoin price takes a BIG runup around the halfing this summer.
You are lucky to have evaporation cooling as an option. I would research it and go with it, cheapest option there is really. I live in a area that weather does not allow evaporation cooling so I used lots of CFM's from fan's and a good exhaust. I think your country's heat might make this a little bit hard though. AC you will not be able to justify it's just to high at this point in miniing. |
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I'm from dubai
electric costs 0.088 $
And I have 4 machines 4 tera hash made in China from 3 months
What machines are you referring to? Sounds like possibly some old A1's. But still if it is A1's running around 4,000 watt to what ever your 100T watts will be.... is a massive difference. I still say take it slower. What is your setup like? Have you started making your mining area for a sizable amount of miners? |
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I have what you might call a "little server" in my home "basement." I changed my fiber for this one patch cords and since them my mining has been restrict, I do not know if the change of the patch cord could be related. Can you tell us more about server? Why you changed it? Most here are using cat5 or something like it and you have fiber... so could be fewer to help on this one here. With just knowing you changed a cable and it became restrict, does not tell a lot. And by restrict is is it not working at all or what is it doing? |
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5% was not soo bad. Im curious for the next dif since Bitfury will release soon.
5% was not so bad when the network difficulty was 30G, but 5% of 111G is a very significant increase! I think we're going to see solid increases right up to the halving, especially as new tech is being introduced. I suspect there will be some efficiency break throughs right around the halving, too, in order to keep mining profitable for the huge farms. It's getting better from larger changes though: Jan 13 2016 113,354,299,801 9.12% 811,421,684 GH/s Dec 31 2015 103,880,340,815 11.16% 743,604,444 GH/s Dec 18 2015 93,448,670,796 18.14% 668,931,642 GH/s 5 percent compared to those I consider a win. Could be a lot worse. Hopefully this one is even lower. |
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Yes you will want to get a PDU that is enough AMPs. So if you get 20 amp... you only need 20 amp pdu. If you get 30 amp I would get a 30 amp pdu. Either way you really need a PDU to distribute power to your power supplies from your 240 line. I would suggest checking ebay though. You can get PDU's at a great discount on ebay used vs buying new. I owe learning this from phil. But I saved a ton going to ebay. |
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No need to bump a thread 8 months old to state the obvious.
Disagree, this info should be glued to top of pile, Hashcoins continues to run their scheme and newbies like me should and will be informed, so UP again. There is no new info though. They bought chips for Ares and Apollo miners, so those two there are a few of them in the world out there. I would guess more of the Ares which is scrypt that 3 companies split the chips. But does not mattter was a while back. They put zeus as old without ever selling one most would think, as we never saw it. They then put up Uranus.... which again they never had the chips for. So it is a scam at this point. Those who did buy have been lied to.... and they should have not have bought. But there is no new info really to keep this thread up. |
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about to buy a s3 with psu and connectors on ebay for 120$, free shipping. worth it? Previously used a few (20) antminer u2s, but they werent profitable. Planning to underclock, but I dont really know what voltage to set at once I buy it. help
you dont set a voltage.. and if you pay for electricity, its not worth it. You would need extremly cheap electricity. The good thing is S3's were built like tanks they do seem to last a very long time. The bad side to that is when you pay electricity and say you have "normal" price at some point it cost more then it makes. So that is where a lot of these S3's are is owners selling them trying to get last part of ROI since they would be losing money running them. |
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I received 2 replacements for dead boards that I sent to Bitmain. Within a couple hours one of the boards is dead again... What a waste of $ and time. I know their response is going to be for me to ship it to them again for repair, because they did so well at gaining my confidence the first time...
Oh man, that sucks  Are you using their power supply? No. I use EVGA PSUs. I've got several S7s running and the others have had no issues over a several month period. Man that sucks, they should have someone fixing these things stateside. What seems to be wrong with it?  Dang I hope they get it fixed up this time, that does sound like a pain. Out of curosity when you say using EVGA PSU's are you using EVGA 1600's? Just was curious on which EVGA PSU it was. |
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I have been doing my fair share of tests with an Antminer s3 and i had some sucess
My family owns factory and there are some empty rooms with AC and all the electrical instalation to support a small farm installed electrical capacity is huge in the factory because there are industrial machines there working 24/7. There i can have free security and even supervisors that work there night shifts
I live in Venezuela here electricity costs less than 0,003$ kwh and the factory already pais for a set amount of kw that they dont even use so it is free.
I have been doing some calculations using a 10% difficulty increments and i can recover investment in 6 months and even after the coming halve of blocks still i can get some nice profit and with cheap electricity i can keep those S7 running for a long time. Or after first year sell that equipment.
What you guys think?
I was also thinking of starting just to try with second hand antminers s5+ i can get them for cheap and i can still profit from them
It's better to get your hands asap on some s5 miners and see how it's going. Remember the difficulty is an uncertain factor. You can't really rely on that. But with free energy, your are quite certain to get your investment back. Took a look at OP. I think we can let this thread die now: Date Registered: January 07, 2016, 01:16:44 PM Last Active: January 07, 2016, 02:21:43 PM So there is a good chance he is not even reading this thread at this point. |
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I hate to say it and to be honest but the era of mining bitcoin is basically kind of over unless you have ridiculous amounts of money to spend to increase hash power after the difficulty. You should be aware that if you mine, at some point and time, your equipment won't secure you a decent rate of return on your investment. If you do mine, you should take into account the raising difficulty and the amount of money you can make on your equipment.
Sadly this true. These days big mining companies run the mining game. They and they online can make a profit with mining. Which means bitcoin is becoming more and more centralized. Mining will concentrated in the cheap electricity places. So it will not be concentrated artificially. It is driven by market force. Yes it's a free market and driven by people buying and selling as far as btc value. Big farms have to play some part in it. They mine and have cheap electricity and massive amounts of gear. So you can count on them selling enough BTC to cover gear and expenses. So I think big mines do play a factor in pricing. But it's hard to say how much. |
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Hi guys I'm new here but I learned a lot of things very important of these wonderful Forum
I want somebody to help me in this
I want to build Bitcoin mining farm where mining speed of up to 100,000 Terra hash per second.
But I want some advice about miners .
I want it low price and using low electricity power
Can you advise me in that?
Thanks
You should have the best PSU which are the most efficient and can save you a bit in power(and a lot if you plan to have thousands of Terahash), and share with us how much cost 1kW/h in your location. You should start slow, going from nothing to 100T is a huge jump. You will not be ready for it most likely. You need enough electricity, you need the electricity wired, you need cooling. Get one miner and test things out. I can't stress enough how hard going from nothing to 100T will be. Chances are you will have miners sitting there waiting on you to set things up. |
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Since I posted above we have pushed on a bit, 22 Blocks to go and I make us at +5.83% so my estimate above probably a bit low, however I have seen things pull back in th last few blocks before. Boy this is difficult even when we are nearly there.  Rich I wish it was under 5, guess I always wish less. But if at the end of this at less then 6 I will be decently happy as it seems crazy jumps are slowing down. I really want to know machines were being used on the few big ones we had not long ago. I would think a lot of the big guys in it would be waiting on bitfury, or other next gen gear. Although with having coming some might be trying to get every bit of BTC mining they can do before it. |
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I still say most common is one such as MyCelium with combination of hardware wallet. You get to keep all the security of a hardware wallet, and can use it on a mobile.
I don't think anything can beat hardware wallet/mobile phpne on mobile security. At least if done right.
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This is not proving anything, saying if current difficulty stays.... you will ROI in a year. We both know that will not happen so why do all this math with flawed same difficulty? All we need to hear is .17 cent's.... he has no chance as far as mining a ROI. No need to go deeper into it. |
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Guys i m looking for the most secure android bitcoin wallet with fallowing features
1.Complete control over my bitcoins-Only i should have private key to my wallet nor the wallet providing service like coinbase.
2.Easy complete backups-Even if that wallet service got hacked i should be able to recover backup on another service.
Please tell me if such wallet exists for android.
try "Mycelium", i've been using it for a long time now and i can say my coins there are secured, but dont forget to make a backup always as we dont know what can happen to our devices I would say most secure is that added with hardware wallet. You can use it on your mobile on: Trezor: https://bitcointalk.org/index.php?topic=1298917.0Ledger Nano: https://bitcointalk.org/index.php?topic=1305888.0 |
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