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Bitcoin / Mining speculation / Re: 25GH Miner Viabilty and Value?
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on: August 12, 2014, 05:36:20 AM
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Solo mine. You get lucky and hit a block, you get 25 BTC. Do you think a real gold miner goes out to the hills and uses a calculator and says. If I move so many tons of dirt I should get so many ounces of gold? Do what you want because you want BTC not because a calculator says you will only get .0001 btc per day.
Yes, they do. |
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3
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Bitcoin / Hardware / Re: IMET’s response to AMT (Advanced Mining Technology Inc) negative allegations
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on: August 04, 2014, 02:39:55 AM
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Sounds like it's simple enough to figure this one out. Look at the board design that YOU APPROVED. If it's different than what was printed, then IMET may have some liability. If it is exactly as you signed off, then you need to eat this one. IMET, did you manufacture this board? The one with the burn marks?  We did make that and it was not damaged when delivered to AMT. One of two things caused that failure. Either the backplane was shorted out (likely to the hash board heatsinks) or the backplane was not connected to the hash boards correctly (off by a pin or upside down). Or the lack of copper in the board itself cause the trails to overheat. IMET chose to cut costs, we paid the price. |
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4
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Bitcoin / Hardware / Re: Jump Start PSU Trick for Antminer S3
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on: August 04, 2014, 02:04:00 AM
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Swap psu and see if the problem follows the psu. I haven't had any issues with grounding the turn on pin on an ATX psu, some may not turn on if the load is too low, but with an Antminer, that should not be an issue.
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5
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Bitcoin / Hardware / Re: Biostar BTC-24GH Bitcoin Miner Review
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on: August 02, 2014, 04:09:44 PM
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Yes, it does. Half node die shrinks are pretty easy, but going from 110nm down to 28nm requires pretty much a redesign of the entire chip. If your (Biostar) engineers have not done 28nm products before, they will have a big learning curve. The licenses for the tools they need are also more expensive and complex, and the design rules are vastly different at the smaller geometries. I am very pleased to see a major, well-established vendor get involved in this space. Please consider a partnership with one of the existing SHA256 ASIC vendors, and leverage your supply chain capabilities to bring cost and power effective products to the market. At 5W/GH/s they're running more expensively than Avalons and BFl 65nm gear - which can had for more or less free nowadays. Thanks for the review but this item is dead before it even hit the shelves.
if this is 110/130nm technology efficiency doesnt matter much - consider it as a small-batch test of thier design. If they go and replicate into 28nm they could catch up to the market quicly, and the review indicates a stable unit once mining. For a company like biostar playing catchup will be easier than it was for bitcoin manufacturers to oranise and fund thier first die-shrink who knows - maybe a BTC-240GH is on the horizon at the same power draw (would require 28nm assuming this was 110nm) I was under the impression from other EEs on the forums that shrinkage required quite an extensive redesign rather just switching the manufacturing process. If it's not too involved that maybe a quick jump to 28nm with a good design would put Biostar into significant competition with the current ASIC leaders. |
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6
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Bitcoin / Hardware / Re: ANTMINER S3 Discussion and Support Thread.
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on: July 26, 2014, 11:59:23 PM
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Wait what kind of house you got? I got 3 ZeusMiner Hurricane X3 and 14 ZeusMiner Blizzards and 6 gridseed mini's -75setup in two separate rooms. Each room has its own circuit. Total 70-75 Mh/s...about 2200 watts. As long as you stay below 1600 watts per circuit you will be right...But does anybody know the max power that can come out of a house in the USA?
I want to throw in 4 Antminer S3's into the mix...
My electric bill is about $100 extra a month with all the stuff.
It depends on the house. Older homes will have less power, 100 amps or less. Newer homes can have a lot more. I'd be very careful if you live in an older home. The wiring using back in the good old days (especially in the 60s and 70s when there was a copper shortage) may be a little sketchy. BTW, it's not uncommon in the US where multiple bedrooms share a single circuit, so don't assume each room has a dedicated circuit. |
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7
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Bitcoin / Hardware / Re: High Capacity Power Supplies
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on: July 26, 2014, 06:36:44 PM
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What I'd like to do as I move forward, instead of buying lots and lots of PC based Power Supplies, I'd like to buy larger power supplies (maybe units that can provide 5,000 watts of 12 volts - or something...) and connect multiple miners to one larger PSU. Except, I have little to no knowledge / experience with large Power Supplies.
5000w of 12v? Even if you can do that, are you sure you can cool 5kw in a small area? A lot of home miners have to spread their miners around the home to avoid turning one room into an EasyBake oven. |
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8
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Bitcoin / Hardware / Re: ANTMINER S3 Discussion and Support Thread.
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on: July 26, 2014, 05:59:56 PM
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I actually did this mod for all of my S1s and saw a 1GH inprovement across each unit. I have enough for one unit coming in on Monday so I'll go ahead and try it myself to verify. The part you are looking for are the eight grey square "blocks" above the heat sink. There were only four-per-blade on the S1  The layout of the S3 board seems to allow for a single long heat sink to cover all of the dc-dc converters? The S1 layout had caps in between preventing the use of a single large heat sink. I bet the larger surface area will work much better than the smaller individual heat sinks. Anyone know where to find something that will fit, and how to properly attach? |
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9
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Bitcoin / Hardware / Re: ANTMINER S3 Discussion and Support Thread.
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on: July 26, 2014, 04:32:09 AM
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When ordering stuff from China, always try to use DHL is possible. DHL seems to always get their stuff through customs with no issues...unlike UPS..
This may be true for where your shipment enters the US. While I haven't had any major issues with DHL recently, I've had a few shipments held up due to minor paperwork issues. FedEX, on the other hand, is almost always a problem. I get the package, but it comes with a extra invoice for handling customs inspections, which doesn't happen with UPS or DHL. Anyway, it all depends. |
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12
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Bitcoin / Hardware / Re: Antminer S! enclosure
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on: July 22, 2014, 03:01:56 AM
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Under normal conditions, it will not burn, but each S1 draws close to 360watts, and should something go wrong, you do have a fire hazard on your hands. Acrylic or plexiglass both produce extremely toxic smoke when ignited, and once it starts to burn, as long as there is oxygen, it will continue to burn.
It's not something I would recommend.
Antminer S1 stock power consumption is 360W but on overclock its running on above 450W. Even at that power consumption, the heat to top, and two side are very low, its cold air. The hot air is only coming through the heatsink couple fins and goes out to the opposite side of the fan. So, no hot air is actually hitting the covers. The cover is used to just redirect the cold air escaping through the sides and top back to the heatsink. The above is from my practical experience. The fire can only come if you are over volting the miner or using non-standard PCI cables or Overloading PSU. Both of them need to be strictly avoided at any cost else the miner will get damaged in a matter minutes. Or a defective power supply, or pci power cables that are too thin, or a short, or ? Sounds like you've never seen what happens when acrylic catches fire. |
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15
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Bitcoin / Hardware / Re: ANTMINER S3 Discussion and Support Thread.
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on: July 21, 2014, 01:32:50 PM
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did you use a credit card with PayPal? I only use my Discover Card with PayPal. You can then stop payment thru the credit card and not rely on PayPal which can be slow to react.
too late, it was already charged to my card. I am just surprised nobody picked up that this would be a scam (thats if it is a scam but of course I dont want to be in denial!). There was a warning about this fake site weeks ago, probably should have made it a sticky. |
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16
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Bitcoin / Hardware / Re: Antminer S! enclosure
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on: July 19, 2014, 01:08:16 AM
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Under normal conditions, it will not burn, but each S1 draws close to 360watts, and should something go wrong, you do have a fire hazard on your hands. Acrylic or plexiglass both produce extremely toxic smoke when ignited, and once it starts to burn, as long as there is oxygen, it will continue to burn.
It's not something I would recommend.
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17
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Bitcoin / Hardware / Re: ANN: BITMAIN has Tested Its 28nm Bitcoin Mining Chip BM1382
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on: July 18, 2014, 05:49:56 AM
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If you take a close look at the control board, you may notice a small uFL connector on the upper right hand corner of the board. If this connector is wired up, and the firmware supports it, it would be pretty easy to add an uFL to SMA cable to wire up an antenna! This would be good news for people like me who need wifi.
Wifi works. Check it out: I don't know if this has been mentioned yet... but the S3 has wireless. I've got mine in hand, saw the wifi tab, figured I would try it out. Bam!
So, while I don't see any place to hook in an antenna, having it sitting right next to my router, that's kind of irrelevant.
Wonderful! |
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18
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Bitcoin / Hardware / Re: ANN: BITMAIN has Tested Its 28nm Bitcoin Mining Chip BM1382
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on: July 18, 2014, 03:48:22 AM
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If you take a close look at the control board, you may notice a small uFL connector on the upper right hand corner of the board. If this connector is wired up, and the firmware supports it, it would be pretty easy to add an uFL to SMA cable to wire up an antenna! This would be good news for people like me who need wifi. |
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20
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Alternate cryptocurrencies / Mining (Altcoins) / Re: Scrypt miners
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on: July 17, 2014, 01:39:32 AM
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Whatever you do, don't pre-order from Fibonacci, it's looking like the biggest scam on scrypt ASICs. So far they have taken $, won't publish even a timeline.
Gridseed and Zeus are both shipping, but it's first gen ASICs.
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