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81
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Bitcoin / Hardware / Re: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH
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on: December 20, 2015, 04:28:01 PM
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Ok, so, the "30C" resistor is the 20k reference one. " and one of the "123" resistor allows you to output 10.6v. divided by 15 chips in a string = 0.71v at the chips Edit: not "123"(12k), but there should be a 1.2k resistor or close value. 1.1k resistor in place of the 1.2k will give 0.77v at the chips 1.3k resistor will give 0.65v at the chips 18k resistor in place of the 20k should also work for 0.64v at the chips 22k resistor in place of the 20k will give 0.77v at the chips Edit, I'm aging, took me 20 minutes to figure the over/undervolt. I am just working from the available pictures, but just to say that I agree with all of the above including the fact that I cannot find the approx 1.2K resistor which is needed from pin 2 on the LM27402 to ground as the bottom part of the potential divider? I have a possible solution which is that U3 on the other side of the board, which in the pictures I cannot read the ident, is a Digital Pot, perhaps set up from the pads on the edge of the board, which would enable a value & hence the voltage to be set? Bit of a wild guess and could be for something completely different but easy to check if someone has a board out of a system.  Also uncertain about U2 marked AG30, is this an LDO & if so what is it for? Also note that the Bitmain pictures show a V1 without U3 and that Batch 6 is V2 & Batch 8 a V3 Board Rich Changing the 20k for 16k and 22k resistors didn't change anything to the hashing capabilities  All 3 blades are still working at 800MHz. All those heatsinks aren't helping to trace the circuits. I need to look deeper into this once I have more time available I have not fully sussed it but am making progress with the better picture. R15, 20K is not the Reference resistor it's part of the compensation network to pin 3 of the Buck with C73 & C75. The reference resistor (fb1) is R9, 82K taking the voltage from the Converter output.The resistor to ground (fb2) is R10, 6K8. However this is where it get's interesting and I have not fully worked it out. In parallel with R10 to Ground is a series combination of R17, 12K and U2. Which of course begs the question as to exactly what U2 (AG30 on one board AG6K on the other) My guess is that it's a single channel Digital pot controlled over I2C by the PIC, but more work needed to confirm this. Rich ok, so R15 = Rc1 in the datasheet, and C73, C75 would be Cc1,Cc2. U2 should be a digital pot made by onsemi, then. In the cat51xx family And that means that we could have some software control over it. I spotted the 6k8 as being tied to ground. I'll do a quick test on one board replacing the 6k8. I noticed that without the controller plugged, the voltage output at the coil was closer to 8v, can't remember exact value. And, it went higher to 10.2 with the control board plugged |
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82
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Bitcoin / Hardware / Re: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH
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on: December 20, 2015, 01:47:56 PM
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Ok, so, the "30C" resistor is the 20k reference one. " and one of the "123" resistor allows you to output 10.6v. divided by 15 chips in a string = 0.71v at the chips Edit: not "123"(12k), but there should be a 1.2k resistor or close value. 1.1k resistor in place of the 1.2k will give 0.77v at the chips 1.3k resistor will give 0.65v at the chips 18k resistor in place of the 20k should also work for 0.64v at the chips 22k resistor in place of the 20k will give 0.77v at the chips Edit, I'm aging, took me 20 minutes to figure the over/undervolt. I am just working from the available pictures, but just to say that I agree with all of the above including the fact that I cannot find the approx 1.2K resistor which is needed from pin 2 on the LM27402 to ground as the bottom part of the potential divider? I have a possible solution which is that U3 on the other side of the board, which in the pictures I cannot read the ident, is a Digital Pot, perhaps set up from the pads on the edge of the board, which would enable a value & hence the voltage to be set? Bit of a wild guess and could be for something completely different but easy to check if someone has a board out of a system. Also uncertain about U2 marked AG30, is this an LDO & if so what is it for? Also note that the Bitmain pictures show a V1 without U3 and that Batch 6 is V2 & Batch 8 a V3 Board Rich Changing the 20k for 16k and 22k resistors didn't change anything to the hashing capabilities All 3 blades are still working at 800MHz. All those heatsinks aren't helping to trace the circuits. I need to look deeper into this once I have more time available Hmm that's surprising. 20K & 16K would have the core voltage to approx 0.57V & 0.77V, which should have been noticeable. However the key thing rather then the hashing is did you measure the Volts out from the Converter? I straightened and tidied the pictures as best I could. Need to identify what u2 / AG30 is and what it's function is? It may be an LDO but these surface mount idents are always tricky. U3 is the chip that may be a Digital Pot? If any one can read the ident from one that would be great. As you can see this is an addition from the V1 Hash board on the Bitmain product page. Rich Here are the pics I took yesterday. U3 is almost readable. http://imgur.com/a/YoNulI'd bet on pic12-1572 http://ww1.microchip.com/downloads/en/DeviceDoc/40001723D.pdf |
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83
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Bitcoin / Hardware / Re: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH
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on: December 20, 2015, 09:03:45 AM
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Ok, so, the "30C" resistor is the 20k reference one. " and one of the "123" resistor allows you to output 10.6v. divided by 15 chips in a string = 0.71v at the chips Edit: not "123"(12k), but there should be a 1.2k resistor or close value. 1.1k resistor in place of the 1.2k will give 0.77v at the chips 1.3k resistor will give 0.65v at the chips 18k resistor in place of the 20k should also work for 0.64v at the chips 22k resistor in place of the 20k will give 0.77v at the chips Edit, I'm aging, took me 20 minutes to figure the over/undervolt. I am just working from the available pictures, but just to say that I agree with all of the above including the fact that I cannot find the approx 1.2K resistor which is needed from pin 2 on the LM27402 to ground as the bottom part of the potential divider? I have a possible solution which is that U3 on the other side of the board, which in the pictures I cannot read the ident, is a Digital Pot, perhaps set up from the pads on the edge of the board, which would enable a value & hence the voltage to be set? Bit of a wild guess and could be for something completely different but easy to check if someone has a board out of a system. Also uncertain about U2 marked AG30, is this an LDO & if so what is it for? Also note that the Bitmain pictures show a V1 without U3 and that Batch 6 is V2 & Batch 8 a V3 Board Rich Changing the 20k for 16k and 22k resistors didn't change anything to the hashing capabilities All 3 blades are still working at 800MHz. All those heatsinks aren't helping to trace the circuits. I need to look deeper into this once I have more time available |
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84
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Bitcoin / Hardware / Re: Bitmain shipping policy
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on: December 20, 2015, 12:55:10 AM
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There was a pretty big drop between S7 and S8 miners. It's possible those re sellers have stock of older higher priced miners, and EU honestly always seems high on miners with VAT/Import.
But yes most likely you get a S8 and pay import direct from bitmain without re seller, and it will be cheaper. Your cutting out a middle guy.
You mean batch 7 and batch 8?? Sorry about that yes mean different batches. Batch 7 was quite a bit higher then batch 8. But it also is faster (and quite possibly more efficient). So there are arguments I can see for a higher price on batch 7. But not to the extent you mentioned above. Thanks for the help my friend.. I would appreciate if someone from Eu who has done this could tell me if everything went smoothly. Maybe there are hidden taxes  After all i live in Greece!! You have to pay taxes even for pissing... The only tax I had to pay was VAT on delivery to DHL (or Fedex/UPS if you choose them) and 12€ flat fee for DHL who acted as a broker (dealt with customs, and supposedly paid upfront VAT for me to the customs). Remember, you pay VAT on item price with shipping added. If the carrier company needs something else than "Bitcoin miner" as a description to select a category for the taxes, you can answer they are "computer accessories". The latest price drop on batch 8 can easily explain a large part of the price difference you see with EU resellers. They bought S7 when they were over 1600€ plus shipping plus VAT. |
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85
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Bitcoin / Hardware / Re: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH
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on: December 19, 2015, 03:34:20 PM
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Ok, so, the "30C" resistor is the 20k reference one. and one of the "123" resistor allows you to output 10.6v. divided by 15 chips in a string = 0.71v at the chips 1.1k resistor in place of the 1.3k will give 0.77v at the chips 1.3k resistor will give 0.65v at the chips 18k resistor in place of the 20k should also work for 0.64v at the chips 22k resistor in place of the 20k will give 0.77v at the chips Edit, I'm aging, took me 20 minutes to figure the over/undervolt. Does that mean i can simply slap some graphite on 30C (20k resistor) to undervolt the Antminer S7? That would be simple and interesting for the long run. yes, it should work, but since the resistor in on board, the value you can read will be different from 20k. So as for the good old antS1, you will need to do it by trials and errors until someone check the original value with a 20k resistor on board, and the target value with a 18k resistor (or 16k for 0.57v at the chips) Measured voltage at the output of the coil was 10.12v, so, it's consistent with my estimate of 1.3k resistor somewhere, except that I can't find it for now. I just modded 2 boards, one with 22k resistor, one with 16k resistor. Let's see how it works |
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86
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Bitcoin / Hardware / Re: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH
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on: December 19, 2015, 01:50:37 PM
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Ok, so, the "30C" resistor is the 20k reference one. and one of the "123" resistor allows you to output 10.6v. divided by 15 chips in a string = 0.71v at the chips 1.1k resistor in place of the 1.3k will give 0.77v at the chips 1.3k resistor will give 0.65v at the chips 18k resistor in place of the 20k should also work for 0.64v at the chips 22k resistor in place of the 20k will give 0.77v at the chips Edit, I'm aging, took me 20 minutes to figure the over/undervolt. Does that mean i can simply slap some graphite on 30C (20k resistor) to undervolt the Antminer S7? That would be simple and interesting for the long run. yes, it should work, but since the resistor in on board, the value you can read will be different from 20k. So as for the good old antS1, you will need to do it by trials and errors until someone check the original value with a 20k resistor on board, and the target value with a 18k resistor (or 16k for 0.57v at the chips) |
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87
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Bitcoin / Hardware / Re: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH
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on: December 19, 2015, 12:47:01 PM
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Ok, so, the "30C" resistor is the 20k reference one. " and one of the "123" resistor allows you to output 10.6v. divided by 15 chips in a string = 0.71v at the chips Edit: not "123"(12k), but there should be a 1.2k resistor or close value. 1.1k resistor in place of the 1.2k will give 0.77v at the chips 1.3k resistor will give 0.65v at the chips 18k resistor in place of the 20k should also work for 0.64v at the chips 22k resistor in place of the 20k will give 0.77v at the chips Edit, I'm aging, took me 20 minutes to figure the over/undervolt. |
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89
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Bitcoin / Hardware / Re: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH
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on: December 19, 2015, 10:45:14 AM
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Anyone running B8 higher than 700M Frequency to test results?
yes, I still need to raise voltage, it's currently running off a bladecenter H 2880w PSU, will switch to a 4k later. It ran at 775 all night long without any issue NICE... Thanks for sharing, J4bberwock. I'll need to take some of the IBM 2000 BB setups from you in a couple of months. It will be another 3 to 4 weeks before I have my power upgraded to justify buying more PSU's. I decided to go with what you engineered and designed for the 2000 BB once the 2880's I have are used up. I have 18 of them. I thought I had 20 but I don't. By the way, Thanks for the prompt shipment! I received it today. GREAT communication and service, Sir! Cheers, David EDIT: I'll order those PSU's the moment I get a work permit to upgrade power. Looks like I'm going with 800 amp service. 1000 amp will be too expensive. Don't forget to check the package for your Christmas gift  |
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91
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Bitcoin / Hardware / Re: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH
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on: December 18, 2015, 03:34:23 PM
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No Invoices. Marked, Bitcoin Miner on the UPS Tracking info or customs though. UGH.
So how do you declare the value of the miners? When they call me and ask for the invoice what should i do? You can print the digital invoice you get. If they did not email you a copy (i just don't remember), then you can see your invoice on your profile, on the website. Then click Orders, then find the relevant order and click view. Print. Then maybe use an highlighting marker for the relevant portion (example); Total [Second Hand] ANTMINER S5 BATCH 7 × 1 391 USD ( 1.396 BTC ) Shit there is no USD on total, can they correct this? for the psus i have this Product Total APW3-12-1600-B2 × 2 280 USD ( 0.667 BTC ) Coupon Shipping Fedex 0.185 BTC Order Total: 0.852 BTC and for the s7 Product Total ANTMINER S7 BATCH 8 × 2 6.2 BTC Coupon Shipping Fedex 0.269 BTC Order Total: 6.469 BTC Go to your Bitmain account Under your orders click on option right side for that order. Mine shows me paying in BTC but also shows it in U.S. Dollar amount for the miner $1823 😟 But only shows shipping in The shipping cost in BTC Order Details Product Total ANTMINER S7 BATCH 1 × 1 1823 USD ( 7.538 BTC ) Coupon AntMiner S7 Coupon 100 USD x 1 -100 USD ( -0.413 BTC ) Shipping UPS 0.194 BTC Order Total: 7.319 BTC You are right on S5, price was in USD because Bitmain priced them in USD. My S5 order shows both, but since they priced S7 in BTC, my batch 8 order only shows BTC price in the "options" |
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92
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Bitcoin / Hardware / Re: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH
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on: December 18, 2015, 12:22:45 PM
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URGENT PLEASE HELP
My 4x Antimer S7 just got to my country and they are held by customs.They are saying that the value is too great for personal use and they require documents for importing on a company.
I have no company and they are trully intented for personale use
They are now asking for a statement from me
What should I say that I use them for and I needed 4 of them ?
Please help me FAST
Thank you
"This particular item is a collection of computer processors called ASICs that perform a specific computational task. Alone, this component does nothing. Once I assemble other pieces and attach the ASICs it solves complex computer math problems. In the most simplest of terms, it is just a computer component." Saw someone else stated this. Should I try this ? I had the same problem with my s4's. The main problem was because the price was high and they said that only company can import this much, and they were worried that i will resell them and i would be competition for other companies. Because as a person i can import only one. And after a week arguing and finding dozen connections they relleased my gear. Exactly my problem ! What country are you from ?They say only a company can import so many units, and I will re-sell them. How did you solve the problem ? A few ideas to justify home use for customs -1200w high tech space heaters to heat your house -supercomputer parts for a school project (if you are still student) -high end computer parts for 3D modelling or virtual reality gaming. |
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93
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Bitcoin / Hardware / Re: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH
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on: December 18, 2015, 11:36:14 AM
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Romania.The worst part is that I already paid BITMAIN in bitcoins and my machines are held in customs ... nice !
Usually, they just need to know in which category they should put it to calculate the taxes. "Computer accessories" worked for me. Different category may lead to different % of taxes on top of VAT (usually, only if the item is valued over 1500€). I never bothered checking if some category would save me money on those taxes since I'm trying to avoid ordering more than 1500€ in a single delivery. |
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94
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Economy / Service Announcements / Re: [ANN] Bitfury ASIC sales in EU and Europe
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on: December 17, 2015, 12:21:37 AM
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I'm sorry that your request for support did not get our attention. When did you send it? I couldn't find it. You'll be the first one to receive a 16nm H-card should we gain enough interest to justify the production.
Thank you for the offer. I still have both versions of these miners. Standing and waiting. Will the new card coming out for the older version or only for the new? Do they need to have the original radiators ? (15.- euro piece  I need some quiet miners . Winter is coming. Off topic: You didn't watch the latest trailer, did you? "winter is not coming"  |
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95
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Bitcoin / Hardware / Re: Bitfury: "16nm... sales to public start shortly"
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on: December 16, 2015, 11:07:13 PM
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ALSO: This thread should be in the Mining Speculation forum since it's all just rumour at this point.
They say on their website they are selling. I would think that is not a rumor a lie maybe but not a rumor. well on their face book page Valery Vavilov, CEO of BitFury, said: “We are very excited to launch mass production of our super 16nm ASIC Chip. The final results of our hard work have fully met our expectations. We understand that it will be nearly impossible for any older technology to compete with the performance of our new 16nm technology. As a responsible player in the Bitcoin community, we will be working with integration partners and resellers to make our unique technology widely available ensuring that the network remains decentralized and we move into the exahash era together. BitFury warmly welcomes all companies interested in joining our integration and reseller program.” Jim Lai, President of GUC, said: “We have worked closely with BitFury’s experienced IC designers and we are glad to assist BitFury to achieve this outstanding result. GUC is proud that the BitFury-GUC partnership resulted in the first 16nm full custom tape-out for both parties.” Maybe rumour wasn't the right word, but when Bitfury had their first 55nm pics and some information was posted here. I think once we see some data or pics of a chip/prototype it will be more than words. I agree it is spec until they really sell some shit to us. I found a quote on the size of their new center let me look for it. from this link: http://www.businesswire.com/news/home/20151216005453/en/BitFury-Announces-Mass-Production-Fastest-Effective-16nm"Staying true to our commitment to minimize our carbon footprint, BitFury continuously works to increase the energy efficiency of our data centers. The company already relies on renewable energy sources to power our data centers with less than half of the energy overhead of the leading Internet giants, and continuously seeks new ways to further reduce greenhouse gas emissions. An important step forward in this effort is BitFury’s deployment of its proprietary immersion cooling technology in its recently opened Tbilisi, Georgia, data center which supports 40 megawatts.*All figures mentioned above were measured with real silicon samples. Mileage for production devices may vary. Thanks to the physics of silicon devices, chips may demonstrate exceptionally low power consumption, or exceptionally high compute power, but not both at the same time." The bold is me. I am sure the huge 188 195 197 and 215 block days this adjusment are them running the plant. As to it using a .07 watt per gh chip I do not think so. I do think they may be doing .15 with it. I estimate the monster big block days were done with 180 to 220 ph so a 40 mw plant running at 32 mw is a safe guess. .15 x 180 ph = 27 mw .15 x 200 ph = 30 mw .15 x 220 ph = 33 mw So my guess is it runs at .15 mw maybe a little better. Still a lot better then .26 to .31 the s-7 and avalon 6's do. 0.07watt chip level doesn't mean the same when you add losses from the PSU, DC-DC conversion, and everything around the miners to monitor them and keep them cool, even when we are speaking novec immersion cooling. I assume 40Mw is not the watts dedicated to the miners, but the whole thing. |
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96
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Economy / Computer hardware / Re: [WTS] ASICMINER Prisma 1.0 Boards ($15/board) - 300-360gh/s
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on: December 16, 2015, 05:29:36 PM
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I have a good amount of returned ASICMINER Prisma 1.0 boards that I'm willing to sell for $15 a piece. Each board should be capable of operating at 300-360gh/s using .8-.9 watts per gh.
No heatsinks included. Minimum purchase of 2 boards required. Shipping costs covered by buyer. 8 should fit in a Region B box.
IMPORTANT NOTE:
These boards are all returns from the ASICMINER Prisma return program last year. ASICMINER offered a full refund or replacement to all buyers as there were multiple reports of Prismas catching on FIRE. There are no temperature sensors on the Prisma boards and things tend to go bad if a chip went out and you are using a PSU with no overvoltage protection. Because of this, I take no responsibility for any damage caused by malfunctioning boards. Do not run them near flammable objects! They are also being sold without warranty or support. The boards I will ship out have been marked as running without issue by the original buyers, but I have no way to test them.
With that said, I managed to personally run 8 Prisma 1.0 units for 4 months without issue. Sidehack ran a good amount of them as well. My personal units were run in an area with adequate cooling, and with a good amount of airflow on the outside of the boards. I also did not run them near anything flammable, just in case...
Controllers
I've got a good amount of Prisma 1.0 controllers and usb to uart adapters available if needed. $15 and $10 respectively.
Can you give me a good price for 40-60 of them including shipping to France ? I may have a small project in which they could have some use. I could use a second batch of 60 later if it works as expected. Do you care if they are marked as working or not? There are a few that were marked as not working, which could be due to a single bad component. I can sell those for $10 a piece. Also, if you buy 40-60, I'll ship for free You can add the "non working" ones, as long as I have at least 40 working ones, give me a total, I'll send BTC right away and give you the shipping address. |
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97
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Bitcoin / Hardware / Re: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH
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on: December 16, 2015, 03:39:29 PM
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I wouldn't lose a lot of sleep over the "missing connectors" on the Batch 8 S7's. The vast majority of the existing S7 purchasers have no idea if their populated and unused connectors actually work. Some of have obviously tinkered with their machines, but 95% have used it as it arrived. After all, if they didn't work, what would you do? Bitmain makes no claim about the unused connectors, and won't "fix" them if they don't work. Even if they did, would you want to send in a working controller (disabling your miner) to get something "fixed" you don't need?
Yes, it looks a little cheap, but way better than some companies (e.g. one PCIe power connector on the KNC Neptune).
In the grand scheme of "S7 Batch number Confusion", this won't matter at all when you resell it.
It's very likely that if you solder the connectors where they are supposed to be, you can have them working if they aren't disabled in one of the new firmwares. |
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98
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Bitcoin / Hardware / Re: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH
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on: December 16, 2015, 02:39:01 PM
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miner is stuck in china "clearance event"... how long does it usually take?
14 hours for mine, it's just the time for the papers to be registered to the customs by the carrier or the broker Bitmain choose (usually the carrier is acting as a broker). I got a call from DHL today asking in what category they should place a "bitcoin miner" for the taxes, some time later, the clearance event was followed by "Clearance processing complete at SHENZHEN - CHINA, PEOPLES REPUBLIC". "Computer accessories" seems to work as a category for customs. |
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99
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Economy / Computer hardware / Re: [WTS] ASICMINER Prisma 1.0 Boards ($15/board) - 300-360gh/s
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on: December 16, 2015, 11:14:41 AM
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I have a good amount of returned ASICMINER Prisma 1.0 boards that I'm willing to sell for $15 a piece. Each board should be capable of operating at 300-360gh/s using .8-.9 watts per gh.
No heatsinks included. Minimum purchase of 2 boards required. Shipping costs covered by buyer. 8 should fit in a Region B box.
IMPORTANT NOTE:
These boards are all returns from the ASICMINER Prisma return program last year. ASICMINER offered a full refund or replacement to all buyers as there were multiple reports of Prismas catching on FIRE. There are no temperature sensors on the Prisma boards and things tend to go bad if a chip went out and you are using a PSU with no overvoltage protection. Because of this, I take no responsibility for any damage caused by malfunctioning boards. Do not run them near flammable objects! They are also being sold without warranty or support. The boards I will ship out have been marked as running without issue by the original buyers, but I have no way to test them.
With that said, I managed to personally run 8 Prisma 1.0 units for 4 months without issue. Sidehack ran a good amount of them as well. My personal units were run in an area with adequate cooling, and with a good amount of airflow on the outside of the boards. I also did not run them near anything flammable, just in case...
Controllers
I've got a good amount of Prisma 1.0 controllers and usb to uart adapters available if needed. $15 and $10 respectively.
Can you give me a good price for 40-60 of them including shipping to France ? I may have a small project in which they could have some use. I could use a second batch of 60 later if it works as expected. |
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