Just to be sure - by 12V DC power adapter - are you saying we need our own PSU? If I overclock it to the full 200 would you suggest a 600W?
yes, you need to provide the PSU. if overclocking to 200GHash, you need to make sure the power supply has AT LEAST 500W on a 12V rail. >600W on a single 12V rail is ideal |
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Why are the prize at MBP so overprized?
They aren't really overpriced. Very close to my target range right now. The difference with these are they are ready to ship right now vs the other companies that if you order from now you will not receive for at least 2 or 3 months. The chips are also more efficient than antminer and avalon G2. I doubt it. Antminers are running at 1.1V. If run at 0.9V Antminers would be almost as efficient as Bitfury. Check out Bitburner fury which run the chips close to 1.0V and the power consumption sky rockets to almost 2W/ GH/s The Antminers are not even in the same ZIP code as the Bitfury chips in regards to power draw. Here are my personal measurements on a 6 card Bitfury doing about 175GH/s sitting right next to a 180GH/s non-overclocked Antminer S1: Antminer - 360W power draw (measured by Killawatt at the wall) Bitfury - 185W power draw (measured by Killawatt at the wall) If the pricing is the same, and you are deploying these en-mass, the Bitfurys save you a lot of $$$ in power. Also Bitfury can be kept cool without loud fans. Antminer is loud  I've got some droning away in the background. the stock antminer fans can be quite loud. 2 of mine are actually quite reasonable with the stock fan + extra PWM fan (~70cfm, <22db) but one of the antminers has a stock fan that roars at 12V and even when run on a 7V adapter is still the noisiest fan in the entire setup |
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You could ask btcguild to set their fees to near 0% since he puts up fees when its too popular, now might be a good time to do the opposite.
Or any pool could offer to do that, might help some
eligius is 0% fees. BTCGuild is still large enough that going there is not a solution to this problem. I wish slush's pool would drop fees to 1% or 0% - its a great pool and i would happily hop back over to it if there were no fees |
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I only ordered 1 K16, but at >2BTC i want a refund of the chips and board. I understand some sunk costs but I expect at least 1.25BTC back at the minimum
perhaps the google doc would be a good starting place - there are a lot of invested parties here who want thier money back and if >10BTc can be returned i think its worth it (lawyers fees will probably be between 2-10BTC in fiat depending how the law system works in that country and whether the argument is viewed as 'simple' or 'complex' from a legal POV
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3BTC for 220GH at ~1400W is silly.
Antminer: 2.65BTC for 203GH (easily overclocked) and ~500W
Bitfury: $3200 (~3.5BTC) for 200GH at ~220W -> easily overclocked to 300GH at 400W
bidding should start at 1.5BTC for both systems together
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Well OK.. I even tried to get more watts out of the ide drive cables but no help. Thanks.
that wont help you. find a power supply with a single 12V rail thats got at least 500W minimum on it - kijiji or craigslist is a good place to look found a 800W, (700W on 12V single rail), FULLY modular (even the 24-pin) Ultra X3 PSU for only $40 BNIB local - 4 PCI-e ports on it for power  |
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The need to pay within a hour is ridiculous. If the buyers BTC in in a paper wallet then it can take over 1 hour to get the coin to a paying wallet, and if confirmations are slow then it will take longer.
With respect, how is it Bitmain's problem that you don't have access to your funds in a timely fashion ? I can understand your frustration, but feel you are barking up the wrong tree here. +1 if I wanted to buy something at walmart on Boxing day, I would make sure my paycheck was fully cashed and in my banking account. I wouldnt go to walmart, pull my item off the shelf, and hang around the cash registers for hours/days until my paycheck deposited *ps: if i had someone standing in front of me at walmart going 'uh, give it a minute, maybe my card will be accepted this time'...DECLINED....'oh, it will work any minute now, can you hold on another 5 minutes?' I would sucker-punch them in the back of the head and ring my own shit through* As my other posts explain, you do not find out it is an hour until you are in the checkout. Using your scenario, you have gotten to the checkout and they have told you that the card system is down and ask for cash, what do you offer then, more violence? This is bitcoin. there is one type of payment and one type only. Your cash example simply does not translate - it would be like the bitcoin checkout asking you to pay with paper wallets despite the obvious fact you are in a different county from the store If you want to buy something priced in BTC, have your bitcoins ready. dont leave your wallet at home when you go to the store |
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Hi,
Given the fact that my psu is rated 450watts dc and at that rated would pull about 530ac from the wall - does that mean that I can overclock like others have done?
Thanks.
Im going to say no, partially because most PSUs cant obtain or maintain long periods of time at the absolute maximum capacity, and generally the consensus is that if you dont have at least a 500W or 550W 12V rail, you will have too many errors and chip failures trying to operate at 400MHz (375MHz may work though) |
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Has anyone every run one of these with 2 PSU's?
no reason why you couldn't - just use 1 PSU per blade, and power both at the same time I am powering my miners with 2 PSUs on each. Sushi told me not to do this however this seems like the only way to get best out of them. Single PSU sometimes shutdowns and display a lot of Xs. 2 PSUs seem to power them without a problem. Electrically there would only be a problem if you had each PSU on a different phase. Used to get this in the old days of RS232 where the printer was a long way from the server as the reference ground volt value was slightly different. It should not cause a problem in a house or single office, I run one of my Ant's on two old 450W Corsairs and it works like a charm. the 12V DC signal has no phase, it should be a consistent current and voltage from both power supplies. anyways, i doubt any of the 12V goes between the blades to cause any issues even if there was phases |
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paid last night, just gotr my tracking (no actual tracking info yet other than creation of the #)
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With respect, how is it Bitmain's problem that you don't have access to your funds in a timely fashion ?
I can understand your frustration, but feel you are barking up the wrong tree here.
I agree with your assessment, with one exception: when making a BTC transfer can take surprisingly long before getting 6 confirmations (hence, over 1 hour). For example, we've seen 28 minute blocks today, IIRC. The aspiration for BTC blockchain is to get a block every 10 minutes, so in comparison to that 1 hour is somewhat ambitious - if 6 confirmations are required before acknowledged. Then again, I think BITMAIN's website shop uses a similar software to what I've been using elsewhere where the software itself has defined 1 hour as the BTC payment window. So not exactly a fault of theirs... (Btw, I think you can re-configure that.) I expect that the 1hr window is only searching for the first confirmation on the network - but wont mark your order 'PAIED' until 6 confirms. as long as you send the transaction in a timely manner (lets say 30min), the system wont bump you from the line. |
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does anybody with an order (that they paid immediately for) which was placed after 15:16:44.0 (based on bitmain's timestamp) have their order status showing as "Valid"?
2.4 BTC Pay:0 BTC Confirm:2.4 BTC Paied Unshipped Valid 2014-01-11 17:24:40.0 Pay:0 BTC Confirm:2.4 BTC Paied Unshipped Valid 2014-01-11 15:00:13.0 |
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The need to pay within a hour is ridiculous. If the buyers BTC in in a paper wallet then it can take over 1 hour to get the coin to a paying wallet, and if confirmations are slow then it will take longer.
With respect, how is it Bitmain's problem that you don't have access to your funds in a timely fashion ? I can understand your frustration, but feel you are barking up the wrong tree here. +1 if I wanted to buy something at walmart on Boxing day, I would make sure my paycheck was fully cashed and in my banking account. I wouldnt go to walmart, pull my item off the shelf, and hang around the cash registers for hours/days until my paycheck deposited *ps: if i had someone standing in front of me at walmart going 'uh, give it a minute, maybe my card will be accepted this time'...DECLINED....'oh, it will work any minute now, can you hold on another 5 minutes?' I would sucker-punch them in the back of the head and ring my own shit through* |
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oh... so you are just dumb. Obviously not, instead of you. Simple math: Bough for 2.4BTC and earn MAYBE in 280 days 25% <> compared to exchange 2.4BTC and hold for 280 days. A simple RISK calculation. As i wrote is not rocket science, maybe i was wrong. For someone it is.  The risk to lose money (Fiat) with buy BTC and hold instead of lose money (Fiat) with buy a miner and can't calculate the difficulty clearly. You get it now? If not, never mind. i have time...  okay, here we go: SITUATION 1: BUY NOW 2.4BTC bought at current exchange rate and held for 1year -----> 2.4BTC as of Jan 11, 2015 2.4BTC bought at current rate and used to pay for antminer -------> ~2.4-3.0BTC as of Jan 11,2015 (the antminer probably is turned off before september though) SITUATION 2: BUY LATER 2.4BTC bought at current exchange rate and held for 1year -----> 2.4BTC as of Jan 11, 2015 or (assume BTC=$1000 right now for simplicity): In 1 year, buy $2400 worth of BTC -------> *unknown amount* as of Jan 11, 2015 (my guess is you will only get about 0.5BTC at that time for your $2400) I'm still not sure why you say that holding will make more, or gain some sort of 'interest'. its easy to estimate how many BTCs mining will produce, and that calculation appears to show it will produce more than its own cost. there is some risk involved because of 'sunk funds' if you had to ever transfer BTC/USD before making back the full miner's BTC price, but you also get a valuable (or maybe just 'collectible') piece of hardware with resale value Please show me what i am missing, because it seems that if a mining device has a good chance of returning 125% BTC of what you paid for it in BTC, that is more then you would get by simply having a cold storage wallet with the same initial BTC in it |
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my biggest question. what will be on customs document.
If its a high price its better to order at sushi reviews . customs in europe is atleast an extra 20 to 30% of btc to euro converted price .
my understanding is that sushi was likely just an organiser who fowarded all the payments and shipping info to bitmain while providing his own support. The units almost certainly still shipped direct from the bitmain labs |
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Ordered one.
Hoping to hear from BITMAIN on the vouchers they promised to original buyers. I participated in the very first auctions 1 and 2 myself. Sushi could not give any discount/voucher benefit due to not being part of BITMAIN.
I never really saw what came of it. I asked them about it on my last order and (either as a result, or simply a token) found an extra U1 in my package just ordered from the site - waiting on a payment confirmation (guess they want more than 1 confirms?) |
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280 day and 25% profit is for this ambiguous future not that big deal, even if bought 2.4BTC now and wait 280 days bring the same profit imho.
I'm sorry, you need to clarify how holding 2.4BTC for 280days will magically earn interest - I think 2.4BTC is a fair price where the unit should make back its cost so long as there are no extraordinary circumstances You ever hear something about price increase? Just look back the BTC price 280days ago. Is not rocket science... oh... so you are just dumb. 1BTC = 1BTC a year from now. not sure what makes that hard to understand. it may be worth 10x as much in USD but that is still going to be 1BTC. if you buy a 2.4BTC miner and it returns 3BTC, you made more profit then if you held your 2.4BTC. is it hard to understand? EDIT: bought and paid for a firesale antminer! |
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so how far can i push this machine without modyfing it? i mean i can take some extra cooler and put near but i dont want to mess with the design itself.
currently i made it to 220ghs. is it possible to push it higher?
please share how you managed 220GH? I thought these would not go past 400MHz (200GH) without high error rates - presumably due to 1.1V being too little for higher hashrates |
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Has anyone every run one of these with 2 PSU's?
no reason why you couldn't - just use 1 PSU per blade, and power both at the same time |
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Why are the prize at MBP so overprized?
They aren't really overpriced. Very close to my target range right now. The difference with these are they are ready to ship right now vs the other companies that if you order from now you will not receive for at least 2 or 3 months. The chips are also more efficient than antminer and avalon G2. I doubt it. Antminers are running at 1.1V. If run at 0.9V Antminers would be almost as efficient as Bitfury. Check out Bitburner fury which run the chips close to 1.0V and the power consumption sky rockets to almost 2W/ GH/s The voltage is only part of the equation i think. The bitfury chips only use around 1-1.2W/GH at 2.2GH a chip while the bitmain chips use around 2-2.5w/GH at 3GH per chip EDIT: ordered 6 cards at the new price. While I think it could/should be a little lower, I had $2100 in store credit so 5 of the cards were 'free' (due to the september shipping delays) just need to buy 1 more antminer and I will cross the 1TH mark for my mine |
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