Because some of us DESPISE the garbage reliability level of recent Bitmain products.
In large scale deploys Bitmains failure rate is only around 7-8%. While its still on the high side its quite managable especially when you compare it to the 30% failure rate I experienced with Ebangs products. Avalon is still the king with a 1.7% failure rate on large deploys. fanatic26 - What is the source of the reliability numbers for Bitmain, ebang and Avalon you are quoting here? Your experience, another bitcoin talk tread, any third party analysis or report? Please elaborate. On the s9's, I have 12 of them in my farm ranging from batch-1 up to b25. To date have had 5 hash boards die, 1 from batch-7, 1 from b9, 2 from b11 and 1 from batch-13., all within this year since June. You do the math. |
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Very interesting...
Hopefully someone in the US starts a Group Buy. I'd be in for a few.
Why a Group buy? Canaan has 2, count 'em, 2 distributors here in the US and is the only way buyers will have OEM warranty protection. |
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Hi all. I am a newbie here as well as to Bitcoin world. So my question might sound stupid... anyway, I've heard that when the new Antminer comes, the old ones are not working to their full effect, or mining not as profitable as they were previously. So for example, we have now antminer S9 which let's is making a 100$ profit per month, when T9 will come would be S9 less effective just only because there is a new machine out there? So any ideas? Sorry for my bad English. Thanks in advance!!!
The S9 and T9 are brothers. Same basic design, same chips. Only difference is that the T9 was built better and runs at a higher chip voltage - that makes the T9 less power efficient but also make it more stable. It has been over 1 year since Bitmain made (very few) T9 and I doubt they will ever make more. |
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Google ATX PSU paperclip
Tons of links about it.
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You do know that an ATX PSU requires a turn on signal to switch on the DC outputs right?
Look at the honking big mobo connector. See a green wire? Use a bare wire (paperclip) to jump it to one of the adjacent black (gnd) wires and PSU will turn on the DC.
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CFM required does not change just because it is a longitudinal fan. Just 7.4CFM is not going to cut it. Aside from that you DO know that type of fan requires a shroud to direct airflow right?
Now a squirrel cage blower like used in a furnace - quiet and high volume.
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Yeah and this whole thread has been quite useless so far.
Nothing real information with real sources on the subject ("Bitmain Antminer S11") that would give anyone anything.
Just a waste of everybody's time.
true, but I think there won't be an antminer s11 until bitcoin mining with s9 isn't profitable anymore (which I can't see in the near future) or like all people said a competitor brings something better out. I've got many s9 miners over here in Austria and I hope for some delay on new ASICs to be profitable a litte bit more. Genesis Mining is sold newer sha256 mining contacts starting on 28 February and and of march, I guess they got some new stuff next year. I know they have a lot of miners of Bitmaintech in the past so that`s why I think a newer miner will pop up soon (somewhere in Q1 2018). Or -- they are hawking the upcoming Canaan A8's which are due to be released to major customers in that same time frame... Since there IS NO 'S11' in the works from Bitemain and only your pure wild speculation on them, guess what I'd bet on...  |
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That^^ and that fact that GUIminer has been useless for mining BTC and totally unsupported for several years now...
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<snip> Research the hows of solo mining ? You believe me if I tell you that I am in full of. OK I'LL BE CLEARER NOW I have a NVIDIA gtx980. I can and i know mining directly with the wallet !!! ex "ccminer-x64 -t 1 -a sha256d -o 127.0.0.1:35651 -O user:password" : Is good I have a baikal mini. I can and i know mining directly with the wallet !!! ex 192.168.0.40:60029 x11 user password : Is good I have a GekkoScience 2Pac . I dont can and i dont know mining directly with the wallet !!! ex cgminer.exe -o http://localhost:33332 -O user:password --gekko-2pac-freq 150 --btc-address MEcXEiE2re5oGSdgNRyLp7gDU8XfFj4dyA : Is not good Why? (Marycoin) And we will try to be clearer: THIS IS A BITCOIN-ONLY HARDWARE THREAD. You have a software issue so post in the correct SOFTWARE threads. Be aware that -ck who wrote cgminer ONLY supports BTC mining questions. CGminer has been forked to mine other coins and for them you need to post in the ALTCOIN software areas because -ck does NOT support any altcoin forks of his software. The Gekkoscience Compac and 2pac's ONLY mine SHA256D coins meaning primarily BTC along with a very small handfull of other SHA256D algo coins.. |
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No idea where you got your info about the PCIe connectors but it is very very wrong. The connector is Molex mini-fit, re the specs from Mouser PCIe Connector SpecsTry 13A per-pin, 3x = 39A x 12v = 468W A good designer will keep things under 300w per-connector for margin. As for burnt connectors - virtually always the result of crappy or worn out PSU side connectors and/or using too thin wire. The max current rating only apply when using 16ga wire which will help pull heat from the contact areas. |
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Newb, expect your totally OFF TOPIC post to be removed by the mods. It has nothing to do with the thread's 16nm ASIC design topic.
And is called solo mining - not 'local'. Post in the right areas numnutz.
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Well that sucks, I was able to run a quiet 2900-3200 RPM in the past, now these suckers stay at 4250. Don't know if I can take the humming Ever since batch-16 many moons ago they have been auto-tune with zero user control over how they work... They are industrial miners and were never designed for 'Home or Office" use. Why do people keep forgetting that? That said, there are several threads in Hardware about building noise reduction enclosures for these. |
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Caanan didn't buy out all the assets of KNC though - they probably just leased or bought the facility itself when it came on the market during the KNC bankrupcy.
8-)
One would hope to God that is the case. Safe bet any IP KnC has/had would be zero value these days. |
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I reached out to Bitfury recently. They quoted 8.15 U.S. a chip and minimum buy of 2 million dollars. not realistic for the hobby engineer.....
An interesting question: Over what time frame would BitFury supply your roughly 245,000 chips if you were to cut them a check for $2M USD? I can understand why you wouldn't have pursued it, but I would think that 245K chips would be a pretty good sized run at a Fab facility, no? I also wonder what level of testing/screening has been done for those parts? I am hardly an ASIC guy, but I have seen the results of poorly screened processors, before the processor vendor has figured out what has to be screened for. Does the recipient of the parts have to speed sort (aka "bin") them? Maybe NotFuzzy would care to speculate on this (keeping his flame on "low")?  How many chips per-wafer mainly depends on 2 things: The wafer size and the die size. A decent write up on this is found at Wikipedia https://en.wikipedia.org/wiki/Wafer_(electronics) I would hazard that TSMC and Samsung are both using 11 or 12 inch (300mm) wafers. What die sizes that Bitemain, Canaan and, BitFury use so far is a secret... Possibly 2x2 or 4x4mm? As for spec testing for performance binning, safe bet BitFury will only guarantee a minimum range of speed/Vcore that 'work's' along with quote-unquote Average performance expected from any given lot of chips. Given that even the Avalon chips constantly tweak their speeds when running I doubt any single narrow range of specs can be given. The 14/16nm node seems still just too unpredictable, at least for hot-running miner chips. |
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For the thirty millionth time folks:
Check either Bitmain, Canaan Creative (Avalons), or eBang's sites.
If they have a distributor it will be listed there. Any site selling miners claiming to be distributors that are not listed on the makers sites ARE A SCAM!
Get it?
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There is zero issues provided the correct HS (Harmonized Shipping) codes are provided by the shipper. Miners are considered "Data processing machine, no keyboard or display". The only catch is that if the order total is $2500 or more then you will be required to pay Duty.
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I reached out to Bitfury recently. They quoted 8.15 U.S. a chip and minimum buy of 2 million dollars. not realistic for the hobby engineer.....
Even *if* does one get hold of chips you then still have to write a driver for them. It is not just a matter of talking to them via I2C or SPI. You need to format the data and establish the work protocols the chips use. Ever since the s7 Bitmain has stopped providing any of that information. If you do manage to get chips from BitFury only then will they provide the needed resources to write a driver. |
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Bob pease, RIP.
Ja. Losing both him and Jim Williams so close together was a huge loss to the electronics design world. At least their articles live on in the archives of Electronic Design and a few books. Frankly most of them should be required reading for all EE's in training. Especially the one behind this 'revolutionary Patented' idea. |
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If Robert Pease was still with us his response to your very correct view on SPICE and other simulators -  SPICE et al are great for knocking out ideas but as you noted pretty much ignore Real World effects. Start quantifying those you can think of then plug into the sims and things go south very quickly... And that is a good thing - provides a Reality Check so you can design around them. Then there is the matter of effects that didn't occur to you or in the case of ones you did think of the dual-edged sword of either over or underestimating their values. Such fun. |
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