Mar 18 2016 165,496,835,118 4.46% 1,184,672,491 GH/s I was super close one of previous predictions but now finally I hit the target.  That was close. GG Under 5% raise is not too bad. It makes ROI this silly S7 a tiny bit more likely. |
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I have two Bitminer S7's bought a few weeks apart. I think the second one is a batch 10. But not sure. How can I figure out the batch number of the miners either through the web or by physical inspection of the machine? Thanks!! Check the S/N sticker. I can't check my S7 atm but iirc there was a small sticker saying the version of the miner and possibly what batch in really small print. |
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Thank you.
They're in a large, empty and not insulated attic, so plenty of fresh air and no one to hear the noise.
One of the two is vibrating a bit but I installed a piece of foam under it.
There's no gain in running them to 30C however. My hashrate seem to go down a bit when its too cool. I guess so would electricity usage. Well is you, i'd tone down the fan a bit to reduce strain, unless you expect temps to raise by a lot at some point in the day. Maybe 70% instead of default's i think 80%. I run my down to the minimum though, stock fan goes down to 2400RPM. |
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it will be just fine. make sure they are connected with quality wire. i think 8 awg wire. Thanks, i was thinking 6 AWG, would be code for up to 50A, if i ever decide to upgrade or something, the difference in price seem to be 10% up from 8 AWG. |
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I have received my 2nd S5 earlier this week. it is located in the same room (my attic) as my 1st one. (and just beside it) However I noticed and 6C/10F temperature difference, and they're both "stock" (no additionnal fan, no fan limit) https://i.imgur.com/rjKduwm.pngIf you're asking if this is normal, the answer is yes. They do the paste job sloppy and the sensor is cheap. Also your temps are really low, you could reduce the fans by quiet a bit to save power/noise. |
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Its hard to tell sarcasm by text, I guess.
I suspected it was sarcasm, but i would not put it beyond my own failure of understanding OP's offer. Because since the price is 3-4x the going price, i was wondering if i didnt misunderstand the offer, here. |
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I will give you the same advice i give everyone start slow. To jump in with 30k would be a bad idea, growing pains from adding so many miners... would happen. But don't let me stop you from mining totally as free electricity is very good.
So my advice start with a few, buy a few coins. And get use to watching gear managing BTC etc. Start pretty slow don't invest your whole 30k. Eventually if you keep doing it... maybe one day. But not starting out.
Hello thank you for you answer. I was only expecting to sell BTC, i am thinking as normal business donīt expect to speculate so much with the price. Just think about if i invest 10k for example in Miners with refrigeration system how long will take till i get money back.. If i check the difficulty it makes me not to invest.. but so many people doing it So many people losing money, yeah. If the ROI takes more than 3 months(right now), its pretty risky. Aim for 2 months ROI. With used hardware and free electricity its definitively doable. For most 2-3 month ROI is pretty hard to do. Long ago it was common place. I don't think we can say it takes 3 months as with difficulty changing... even with free it's hard to speculate. I have not seen anyone who can accurately predict 3 months of BTC mining anymore. Just to hard to predict. With strictly Bitcoin its a bit hard. If you score a S3 for 30$ you have 1.5 Months ROI. S5 for 100$, 2.2~ Months ROI. Assuming free electricity and reusing PSU's you already have on hand. For the S5's you need to be close to a Datacenter that's selling out. For S3, or i guess S1's would work too... but it would have to be local pickups. |
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any reason why not the s7?
it would be very hard for him to do to the s5/s7 that he did for s3 because the s5/s7 use a read only file system. so once you reboot it, it will get set back to stock  Is this why I can't change the root ssh password? Chinese need their backdoors. It wont be a backdoor unless you leave your router wide open as well. Still, passwd doesnt work? Password works but only default. If you change the ssh password (which is a pre-req in my book) it just reverts back to "admin" Yes - I am a networking/security professional so I build my own firewall, virtual servers... all open source. Not Password to login. passwd, to change the password, worked for me. You probably know already, since you're a networking/security professional, but this is how to use passwd; passwd root newpass newpassagain http://www.cyberciti.biz/faq/changing-password-of-specific-account-in-linux-commandline/This revert the password to admin? |
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Probably the cheapest Antminer S5 that i've seen in a while.
I like how he copied the incorrect pre-release information. "Silent operation" "1.5TH/s" So untrue. I remember the 9v PSU line they removed as well hah. How is this cheap though? Unit price 450$ each? |
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I will give you the same advice i give everyone start slow. To jump in with 30k would be a bad idea, growing pains from adding so many miners... would happen. But don't let me stop you from mining totally as free electricity is very good.
So my advice start with a few, buy a few coins. And get use to watching gear managing BTC etc. Start pretty slow don't invest your whole 30k. Eventually if you keep doing it... maybe one day. But not starting out.
Hello thank you for you answer. I was only expecting to sell BTC, i am thinking as normal business donīt expect to speculate so much with the price. Just think about if i invest 10k for example in Miners with refrigeration system how long will take till i get money back.. If i check the difficulty it makes me not to invest.. but so many people doing it So many people losing money, yeah. If the ROI takes more than 3 months(right now), its pretty risky. Aim for 2 months ROI. With used hardware and free electricity its definitively doable. Thank you, thatīs a little greedy for doing this business i was wondering to buy some s7 and the ROI is 6-7 month at least.. So was expecting if there was going to be a new machine Price/MiningGH There will be, but the ROI will be longer. When you have free electricity, your advantage is you can buy cheap obsolete gear in term of efficiency and not raise your costs, beside more PSUs. |
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I will give you the same advice i give everyone start slow. To jump in with 30k would be a bad idea, growing pains from adding so many miners... would happen. But don't let me stop you from mining totally as free electricity is very good.
So my advice start with a few, buy a few coins. And get use to watching gear managing BTC etc. Start pretty slow don't invest your whole 30k. Eventually if you keep doing it... maybe one day. But not starting out.
Hello thank you for you answer. I was only expecting to sell BTC, i am thinking as normal business donīt expect to speculate so much with the price. Just think about if i invest 10k for example in Miners with refrigeration system how long will take till i get money back.. If i check the difficulty it makes me not to invest.. but so many people doing it So many people losing money, yeah. If the ROI takes more than 3 months(right now), its pretty risky. Aim for 2 months ROI. With used hardware and free electricity its definitively doable. |
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if you have if you have free electricity and 10k cash
how much you will invest in bitcoin mining and when ?? right now or later and why
Normally I would hear free electricity and jump into it. But I will caution you like I do all new miners. Start and grow slowly, if you start with 10k worth of equipment.... that is a heck of a learning curve. If you go slower you can learn and work on cooling and other aspects. So buy 1 or 2 and see how it goes. Don't jump in with all 10k first thing being new. Maybe a couples of S5's to get an idea? People are basically giving them away now, at the current asking prices sellers are demanding for them... Its a bit crazy. Their returns halved, their price dropped by 75%. With how far S7's are dropping though I think I would send him for a S7 over a old S5. It is surprising but considering price per hash.... I see S7 as more attractive with just a little more spent. That little extra get's a LOT more efficiency. So unless it's a deal go S7 in most cases. I just don't think S5's have dropped as quick in value as S7's have with bitmain lowering prices. You might be able to get S5's at 100$ now. At least over here. I'm not sure why the value of S5's has fallen so low, its still 2 Months ROI on free electricity so i figured lots of people with it would be buying them. *shrug* |
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It's a $200 Keyboard? Why asking 1btc Why is this a 200$ Keyboard in the first place? Does it do magic things? |
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Hi, So one of the hashing boards in one of my batch 1 S7 has stopped working, what should I do?   If anyone got any tips/tricks I would appreciate it. It's probably not worth it to send it back to Bitmain for repairs? The shipping cost alone would probably be too much AFAIK. (Norway) Your board #3 is showing problems too. I'd say try powering just one board at a time. Maybe the problem is your PSU. Maybe that would be the best case Scenario. |
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if you have if you have free electricity and 10k cash
how much you will invest in bitcoin mining and when ?? right now or later and why
Normally I would hear free electricity and jump into it. But I will caution you like I do all new miners. Start and grow slowly, if you start with 10k worth of equipment.... that is a heck of a learning curve. If you go slower you can learn and work on cooling and other aspects. So buy 1 or 2 and see how it goes. Don't jump in with all 10k first thing being new. Maybe a couples of S5's to get an idea? People are basically giving them away now, at the current asking prices sellers are demanding for them... Its a bit crazy. Their returns halved, their price dropped by 75%. couples of S5's from where to buy those eBay or there is specializes site in selling used bitcoin mining hardware Guess it depends where you are. If you were in Canada i'd definitively talk to Allinvain. I sell some hardware but not 10k worth. And if you're outside North America, shipping would probably kill the deal. Regardless, try the marketplace here on the forum. Don't do any trade without Escrow. |
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i'm working on oil immersion cooling, remove the fans n stickers then dip the whole s7 into oil bath. use a car radiator for cooling the oil, pumps to circulate the oil in tank.
have to "cheat" the fans. s7 needs to "see/detect" 2 fans or else it won't mine. not difficult to "cheat" it.
coming soon heh . . .
Why not just leave the fan on and spinning? They'd move the oil through the s7, but spin much slower. Since the motor would be perpetually oiled, i dont think it would damage them? They are meant for 4000+RPM operation in open air. Oil is too viscous, they would burn out trying to move that much liquid and probably melt some stuff. Ah. There was that tube where they would build Mineral Oil rigs. They said fans don't burn out even though they can't spin fast at all, because to burn out, there would need to be excessive friction. Since the motor in fan is just current being run around the fan pole to make it spin, there's no actual strain on the parts. They say however the fans don't actually make any difference in cooling performance, they just looks cool. Until you take them out, then they remain pretty much forever sticky, but however still work normally afterward. I don't know if those(deltas) fan Specifically would not work under mineral oil, but in that case; Cheap low performance PMW 120mm case fans definitively do. I dont know if the firmware would accept those readings however? Might be 2x4$ bucks fix, if the firmware just look for a signal. |
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i'm working on oil immersion cooling, remove the fans n stickers then dip the whole s7 into oil bath. use a car radiator for cooling the oil, pumps to circulate the oil in tank.
have to "cheat" the fans. s7 needs to "see/detect" 2 fans or else it won't mine. not difficult to "cheat" it.
coming soon heh . . .
Why not just leave the fan on and spinning? They'd move the oil through the s7, but spin much slower. Since the motor would be perpetually oiled, i dont think it would damage them? |
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Is there still not any 3rd party cooling kits for the S7? I'm considering selling my last S7 thats in Canada, but only because of the noise.
I wonder if it possible to use the Antminer S3 water block and a cooling kit from syscooling.com ? If they still sell that stuff. There was this mod with S5: https://bitcointalk.org/index.php?topic=929437.0They have been out of the game a long time, and in my opinion for good reason. Last thing I would do with a nice S7 is mix syscooling gear in it. I would go for a fan mod and run at lower freq. Or other ways to make noise less. There have been a few mods some have shown. But I would stick with air cooling personally. Dunno, i would not mind a completely silent S7. I dont know if syscooling would be the go to or not, however. |
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if you have if you have free electricity and 10k cash
how much you will invest in bitcoin mining and when ?? right now or later and why
Normally I would hear free electricity and jump into it. But I will caution you like I do all new miners. Start and grow slowly, if you start with 10k worth of equipment.... that is a heck of a learning curve. If you go slower you can learn and work on cooling and other aspects. So buy 1 or 2 and see how it goes. Don't jump in with all 10k first thing being new. Maybe a couples of S5's to get an idea? People are basically giving them away now, at the current asking prices sellers are demanding for them... Its a bit crazy. Their returns halved, their price dropped by 75%. |
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