Running with the Bitmain 1600w PSU my s7b8's, as reported by my UPS's are all pulling 1,220-1,255w from the AC plug. Running stock clock speed all have been pretty rock solid at a daily average of 4.7-4.9TH/s sometimes hitting as high as 5.8THs (and occasional lows of 3.8TH/s) over a 10min period as reported by my pool.
That is strange, even at 100% efficiency, there numbers do not add up. The DC draw would be higher than the AC draw you are reporting. It would be cool if the B8's were that efficient, but they certainty are not here for me. |
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Just had a board failing on a S7 (4,73 TH/s) .. not to my surprise board number 1
Bad engineering from Bitman.
Why?
Board 1 has the small heatsinks on the outside (half the size of the inside heatsinks) AND the airflow is partially blocked by the fan mounting plate on the inlet and exhaust...
no wonder board 1 will fail first... it just isn't getting enough cooling... fans @ 75% in a 10 degree centigrade room.
Taking the board out an replacing it with a "dummy filler" so it will keep on hashing at 66% while waiting for a replacement.
looking at the failure rates it doesn't come as a surprise that board 2 has the lowest failure rates, there is logic in 1 failing first and 3 failing second, when looking at the size and placement of the heatsinks.
other S7 (4,86) running smooth in the same room for a week now..
edit: fan percentage added/typo
What C where you reading on the board? All my boards are +- 2c from one another; 53C, 51C, 52C. So if board one had poorer heatsink i think you would be able to see the difference somewhat in the temp readings? |
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Everyone is different but I would find it hard to sleep in same room....about half as loud as a vacuum cleaner running depending on the fan speed you run it at. Then you will have the heat also....so depending on where you live it may get warm in the room as well.
Well, my S7 running at lower fan speed, has a super noisy and high pitch noise. And even at highly reduced fan speed, my dB read it louder than my shop vac at one feet, so. Sleeping with a S7 in the room is perhaps like having 1 shop vac taped to each of your ears. |
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You don't even know what calculator to use. You have a lot of learning to do
before anyone will take you seriously.
So far it look like some new guy trying his luck at scamming. One that has very little knowledge with Bitcoin; "processing crypto currencies" Cute. Op, you would not even be able to pay yourself back 100% in 6 months, so how you could pay investors back? Its not possible. If you're really that prominent in your country, you would be able to get a federal loan for a governmental project. But your numbers don't add up. |
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Hello everyone!
I need to let you know that I have never mined before. I was considering getting an S7. I need to ask you how noisy it is? If it is too noisy for sleeping, is there a way to isolate it?
thank you
Are you deaf? If not, then no. The noise is about equivalent to someone screaming in your ears, non stop, constantly, you'll also damage your hearing pretty rapidly. If you're not deaf right now, you probably would become rather quickly. I had to isolate the miner in a shelve covered in acoustic panels, then when its at half fan speed, the noise is bearable, in the next room with the door closed. Bearable as in under the 60dB threshold of noise you can listen to without hurting. At which point then using ear plug make it "quiet". |
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My batch 2 freq rated at freq 575 is outstanding.
It can do as high as freq 631 does 5120 gh at .26 watts per gh.
On the other end if you run it with a titanium evga t2 at freq 575 you get 0 hardware errors and .246 watts per gh.
Wonder what the suposid gain was for making them at 700 out of the box. What are new ones looking at power wise if not .25. I know originally people were running them with evga 1300 watts. Now that won't handle it if I understand correctly. The gain was to use less chips to attain the same hash or so. So for the Chinese's "Full Volt Full speed" portfolio, cost effective BUILD, they did well, since they take 135 chips now to reach 4.73TH/s instead of 162 or whatever. So their costs went down and we could argue that the price we pay went down too. But the end result is .29~ efficiency instead of .25, since the chips need to run at a higher voltage. (And very well maybe a higher failure rate, but i can only speculate.) And the EVGA 1300 watts can do it, albeit at reduced efficiency. I estimate about up to 1480w at the wall. My EVGA 1600 P2 does 1415 watts which equate to 1295w DC, but i do not have the fan running at full speed. |
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I'm getting ready to order a couple B9's I guess. Just little concerned with all the people having the problems out of batch 8. I did not see all the problem posts with the batch 5 stuff. Wonder If I should look for some of those over the new ones.
I don't know, my B8 is fine so far, not sure if B8 has just been bigger, thus more vocal people minority reported problems. Regardless, its clearly "made in China stuff". Its cheap and cost effective, just not fully reliable. Yeah, awful nice of them to start making their products worse wasn't it?
The price sure went down, too. But this kind of thing would of been easier to swallow, imo, if there was volt control, as to be able to make the most of what they're giving us, after their stunt. Right now the way its presented, many don't realize the reason why the later batch has more or less the same hashrate as the previous batch. Now their "Power Efficiency: 0.25 J/GH" is plain false. |
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I think this will cause a lot of heath which you cold use only in winter like this maybe  He is basically thinking of making a water cooling like system with oil and, well pretty much a ghetto jury rig. It could work fine, although its a lot of work but little gain, it could be fun to do. |
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Hello, I'm quite new to the bitcoin world.
I'm facing this strange issue, I'm running a Dragon Miner T1 which should run at 1TH/s.
When I log into its interface I see, in fact, that it's running at the said speed, but, when I log into the pool, I can see a quite lower speed, something around 500 - 600GH/s usually.
Do you have any hint how this might be possible?
I replaced its fans so I might think it might be an overheating issue, but I don't understand why, on the miner page, it says the right, full, speed.
I also made some tries changing difficulty - don't think it matters, but I'm also not sure what to set
Any help?
Thanks
Start by checking the rejected/error rate. A 1th/s mining rate will not mean much if its wasting 40% of its work. Then try another pool. If its overheating, you should be able to tell if you have a thermometer. If everything is clear, keep asking here until you find the answer you want. |
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Hi. I plan to start a project of creating an oil cooled antminer s5 system, mostly for fun and educational purposes. I want to see, through transparent oil, my ant miner creating bitcoins in my living room with nearly no sound  The present plan is easy. 1) Submerge an antminer s5 into a bath of oil. 2) Cool down the heated oil by other means. I plan to use a (car?) radiator where I will pump the heated oil through using a small fan submerged in oil. Challenge 1. I want to remove the original 120mm fan attached to s5. I think that it will be too strong and disturbing if running inside the oil bath. Questions. 1) Will s5 still run OK when the stock fan is disconnected from the system and the power pins for the fan left open? 2) If "no" in 1, is it a simple way to trick s5 to make it works with no fan? 3) If I want to use the power pins meant for the original 120mm fan to drive another smaller fan (to pump the oil through the radiator), are there some important requirements the smaller fan needs to fulfill? Any comments from you will be highly appreciated. Best regards, aknnig 1) No. It need FAN1 connected 2) If leaving a fan connected is a simple trick, then yes. 3) It has to be a PMW fan i guess. |
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Im looking into starting to mine bitcoins.
Any suggestions for cheap and efficient miners?
Hard to tell you what would be profitable for you since you gave absolutely 0 information to go with. Also Cheap and Efficient doesnt work together. Its at best either one or the other, its never both and its actually fairly often neither. |
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Isn't it better to buy s7 ghs from hashnest since it's alot cheaper than purchasing the physical miner? And it will also be shipped to you eventually when they shut them down :-p
A lot cheaper how? 0.24cents/GH is not really any cheaper, its actually fairly more expensive and you pay a very high fee for the "hosting". The S7 goes for like .2 now, albeit before shipping + duty etc, and without a PSU. |
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Waiting for an electrician to run 220v subpanel in my mining location. Currently all I have available and unpopulated is a 20a 120v circuit. I'd like to run 2xDPS-1200 on it, each powering 3xS3, but I know that may be pushing the PSU a bit hard given 120v input. Have any of you ran something similar?
The PSU is only rated for 900w @ 120V. You need 240V to pull 1200w from it. Stick to 2x S3 per PSU until you have 240V available. My bad, i did not properly do my homework on the DPS-1200FB. But if they can do 900w DC, then he would probably be okay still, since 340W at the wall means pretty much 300W DC. Maybe a one or two step underclock would be in order to not push your luck. I don't know how he's clocking them, but going from memory 250MHz pulled about 400W DC. If that's how he's running them, I wouldn't do more than 2 per PSU on 120V. I doubt that, my S3 consumed 350 watts at the wall sligthly overclocked on G2 EVGA's, so that would be about 315W DC, i doubt you could even overclock a S3 to 400W DC without overvolting them somehow. So stock -1 or -2 clock steps should easily be under 300W DC. You're probably right, it's been a while since I measured them. I still have 2 heating the basement, I'll try to get a measurement sometime today. Its not too mission critical anyways. We both agree that 2 S3(per PSU) is safe both for the PSU and the circuit and that 3 S3 per PSU is pushing the PSU at least to its limit and the circuit as well. So the rest is just extra information for OP to properly clock his 4 or 6 S3 if he want to make conservative use of his electronics or not. |
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Waiting for an electrician to run 220v subpanel in my mining location. Currently all I have available and unpopulated is a 20a 120v circuit. I'd like to run 2xDPS-1200 on it, each powering 3xS3, but I know that may be pushing the PSU a bit hard given 120v input. Have any of you ran something similar?
The PSU is only rated for 900w @ 120V. You need 240V to pull 1200w from it. Stick to 2x S3 per PSU until you have 240V available. My bad, i did not properly do my homework on the DPS-1200FB. But if they can do 900w DC, then he would probably be okay still, since 340W at the wall means pretty much 300W DC. Maybe a one or two step underclock would be in order to not push your luck. I don't know how he's clocking them, but going from memory 250MHz pulled about 400W DC. If that's how he's running them, I wouldn't do more than 2 per PSU on 120V. I doubt that, my S3 consumed 350 watts at the wall sligthly overclocked on G2 EVGA's, so that would be about 315W DC, i doubt you could even overclock a S3 to 400W DC without overvolting them somehow. So stock -1 or -2 clock steps should easily be under 300W DC. |
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In short, nothing for you for now. The campaign manager reward you for your forum activity on certain boards while you wear their signature or avatar. As such you need to be able to "wear" a signature first. Something you get access to when you reach a higher "level" of activity.
This is not true. There is campaign for even newbies. For the OP; simply read this topic through carefully and pick campaign suitable for you: https://bitcointalk.org/index.php?topic=615953.0Please, he'd be lucky to make 1 cent per post. Campaigns down at that level are a waste of time, he'd not even make one dollar before he posted enough # to join a proper one. Even faucet slave labor would be a better use of his time and i strongly suggest newcomers to stay away from it. |
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Waiting for an electrician to run 220v subpanel in my mining location. Currently all I have available and unpopulated is a 20a 120v circuit. I'd like to run 2xDPS-1200 on it, each powering 3xS3, but I know that may be pushing the PSU a bit hard given 120v input. Have any of you ran something similar?
The PSU is only rated for 900w @ 120V. You need 240V to pull 1200w from it. Stick to 2x S3 per PSU until you have 240V available. My bad, i did not properly do my homework on the DPS-1200FB. But if they can do 900w DC, then he would probably be okay still, since 340W at the wall means pretty much 300W DC. Maybe a one or two step underclock would be in order to not push your luck. |
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Waiting for an electrician to run 220v subpanel in my mining location. Currently all I have available and unpopulated is a 20a 120v circuit. I'd like to run 2xDPS-1200 on it, each powering 3xS3, but I know that may be pushing the PSU a bit hard given 120v input. Have any of you ran something similar?
No problem whatsoever for the PSU. But the circuit can't handle it, or i would but at "overload", over the 80% continuous load rating. Since 120v * 20a = 2400 * 0.8 = 1920 at the wall continuous load limit. Assuming you actually get 120v. You can do it and its probably not dangerous. But if you want to stay under the 1920watt at the wall limit, you would not have to underclock a whole lot since 6 S3 could pull something like 2130watts, or you could run 5 S3 on it and forget about it. |
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doubt hed even get antminer s1's at that rate. he requires power supplies with them
Op is saying UP to .1, meaning he offers less if the efficiency is lower, which mean he is not even offering 14$ for a S1 or 115$ for an S5. They go for much much more than this. Even someone interested in reselling your stuff at profit would pay more than this. Yeah i'm not selling my S1's for 10$/ea, PSU or not, this offer is laughable. Or my S5's for 100$/ea. Scrapping all S1/S3/S5 for components would be more profitable than selling at .1 Even .2 is a lowball offer. S7's after shipping, import and everything at closer to .23~.24 at current BTC price and then you need a PSU. S7 is a very very good deal, but in no way does this make a S5 worth much less than 225$. |
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Don't listen to people here, they lie all the time. If you want to make free money, you must buy a S7 and start mining as soon as you can. Do Not Wait. Sell your car, sell your house, sell your kids, sell your wife, buy miners. Very soon, you will make $$$$$$$$$$$, more than you dream about. Very soon, you will buy new cars, new houses, new wives. DO IT NOW!!!
Not sure if serious. Maybe you should go troll somewhere else. If someone has to pay for the hardware, in this case a S7, then it is not free money. If you do not have access to free electricity, it is also not free to run. And you also need a power supply to fuel it, which is also not free. TLDR: Your post is nonsense and should be disregarded. |
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Hi.
As im new on this forum and i can see it a lot but can't understand much, so will someone explain to me that how do signature campaigns exactly work? and is there any campaign for a newbie like me?
Any reply will be appreciated.
Cheers
In short, nothing for you for now. The campaign manager reward you for your forum activity on certain boards while you wear their signature or avatar. As such you need to be able to "wear" a signature first. Something you get access to when you reach a higher "level" of activity. |
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