That PDU doesn't take up very much space. If density required it, 4, 6 or even 8 is completely feasible, however if you're running a 40KW rack, you'll probably want to think about 3-phase.
Instead off say a 60a 208v 3ph PDU, couldn't someone just get 2 30a 220/240v PDU's, space permitting of course ? Might just mean an extra outlet / breaker etc. I had an electrician wire up 2x L6-30 sockets (30A 213V) and an L21-20 (20,20,20A 120V) for my space, giving me about 10kW of usable 213V and 6kW of 120V. I PDU per outlet |
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Yes I had previously done that calculation as well. The only thing I can think of is if you are (or maybe your employer is) already paying for a rack that is underutilized power-wise but has a little space left you can add a few of the miners. I couldn't give a rats ass about nanometers or "sexy" miners (seriously you guys need to get out more). All I care about is price, delivery, reliability, hash rate, and power usage.
Obviously, I don't have to agree with you 100% (except for the part that I should get out more).. but you're right on the money with that fact that the ASIC doesn't need to look "pretty". To get the job done is the right attitude and it's not like we'd look like poster boys ourselves either. Furthermore, it left me thinking about the 1.25U competitor.. If they consume between 1.2 - 1.35kW power, why bother with such a small factor (and risk with not being able to dissipate the heat effectively, hence more noise for fans spinning at max)? Yes, it is the coolest looking kid on the blockchain, but as most Data Centers can normally only facilitate up to between 8 to 12 kW of power per rack (including the equivalent in cooling), where lies the benefit in 1.25U when you can only fit 10 of those into a 42U rack maximum, leaving 70% of the rack unpopulated from a density point of view? Data Centers that could facilitate more power are few and far between. In this sense, BITMAIN seems to be spot on with the sizing - but it does come down to the price and how well they can position themselves on the market. No doubt more competition is coming and the big names of the past are looking to regain their position. What sort of servers are used that have higher densities of power than the usual rack? (fitting with the scenario you suggested above). there are examples of server racks that are 3 antminers/4U = >30 antminers or 12kW. I assume with enough airflow the high power demand can be handled. Most racks though are not often equipped with more than 1 or 2 6" PDU units, generally capable of 4-6kW each depending on the outlet style. However, adding another PDU or simply employing multiple shorter but equally powerful PDUs would at least deliver power to the rack. Its also quite possible not many datacenters expect such power density, and may not have enough available outlets per rack even if airflow/cooling are not a limitation |
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Only one of my Orders was for 0.002 Bitcoin the Other 2 Orders were from 0.069 Bitcoin and just under 0.02 Bitcoin.
Dude, honestly, what on earth where you trying to accomplish with the 3 orders that you made? All I see is that you sent them a partial payment without any intention to really complete the payment for them. For.. what? To be able to re-sell them to some other dude on this forum with a mark-up, should they get sold-out like KnC and other pre-order vendors? I would have paid in full if there wern't better offers by Better ASiC Providers. I've asked for my money back for months now and I was going to use that money towards purchashing an actual ASiC worth something that makes ROI back within 2 months and costs 10 times less. Ohh and btw my purchases are none of your concern so kindly don't judge me on wanting a refund that I am entitled to get back. And to put it simply , I did not ask for your opinion , I asked for a refund  Just out of curiosity what is the other asic that'll ROI and cost 10 times less? Not being disrespectful just wondering, because I can't think of any right now. Not Bitfury, not gridseed, not Coincraft clones. Ants are the best buy at the moment. +1. rabbi was crapping like this in another bitmain thread a few weeks ago, lots of slurs and aggression about the fact he sent 3 seperate amounts of ~$1.25,$12.50, and $38. one might ask themselves: why would you send three insignificant amount when trying to purchase a piece of hardware that cost ~2BTC at the time, or more than 22x rabbi's... 'pre-order deposit'? Its no wonder bitmain kept the change when the remaining 96% failed to be payed for hours or days |
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only trick is that you need to wire up most of the power BEFORE you cram everything into the cabinets, especially if you use the screw terminals
this. once they are jammed in it will become a chore to change or adjust anything. the antminer S1 isnt very good for racks due to the modular design and the location of power/lan connectors. As mentioned, a sturdy shelf is really 10x easier to work with |
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In the past few days, the blockchain.info API stopped working and we cannot confirm all the transaction until yesterday. We had to manually confirm some of the orders, but the man hands' speed could not be compared with computer, so lots of order were delayed in shipping. We feel sorry for what happened, and we are deploying the second payment API, and our private payment service is planning.
We will adjust the price of the S1, and starts to sell Batch 3 of S2. All the orders which is influenced by above accident will get coupons.
Can you please refund orders that haven't been fully paid? If you only pay 0.002btc for 3 separate orders and then expect them to return your money that costs more to send than it's worth, then you must be crazy! It looks to me like you are trolling them via their order page... didn't know you could go that low... It doesn't matter how much was paid on the order.... The minimum TX Fee by Bitcoin-QT is only 0.0001 Bitcoin so kindly fuck off with that shit...  maybe you should... you made several orders, paid 0.002BTC (just more than $1), and then griped about it for weeks now trying to make it sound like they stole thousands of your dollars. leave it alone, its not worth thier time. apparently your time isnt worth much though. consider it a $1 learning experience |
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I would buy a unit, but only if using escrow, or having the seller ship first (my reputation on the forums trumps theirs at the moment). if shipping first sounds unreasonable, that is why I suggest escrow  |
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^those questions.
I would be interested in buying one, the price is competitive.
however, the competition has both nicer looking units with LCDs and also positive feedback. I will buy a unit from you if escrow payment can be used through a known forum member or if you are willing to ship in good faith to me based on my own forum reputation as an escrow provider and longtime member running a 2.4TH (for now) farm
^(if you are unwilling to trust me enough to ship first, imagine how I feel looking at your new account that relies on the 'chinese crutch' of poor translations and minimal details - that is why I suggest escrow)
PM me if you are interested in selling a unit to me. The price is right and I would be more than happy to leave lots of detailed feedback on the transaction
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I can offer discounts authorized by pcfli to help recover some of the BTC lost in a scam.
I am interested, if they are transferrable. Assuming i can see enough proof of legitimacy in the next day or so i will be certainly placing an order for one unit |
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I have 9 $125 coupons left.
1 coupon = $100
2 coupons = $185
3 coupons = $280
if transferable i would be interested in one. a little concerned by the skype scamming so can anyone confirm miners successfully delivered to north america or canada, and what sort of import costs? |
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Almost bought a few S1 units today - but felt i may be better off waiting for the Batch 3 S2 units to be priced and for some Batch1 units to be validated by buyers first.
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how did you snag a bitmain shirt? I have ordered ~15 S1 units this year and no shirt lol
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^Because the mods are holding teh bag of dicks that they want to unload on bigger idiots  What are those? Ant miners? ""Our existing hardware assets from AMC liquidation 6 Avalon miners, currently running on BTC Guild under "Team AMC" for around 430 GH/s; An order of Avalon chips from steamboat's batch #1, for 68 Klondike-16 boards, rated at 68*16*282 = 307 GH/s; An order of 20,000 Avalon chips (end of May and beginging of June orders), for a combined hashrate of 20,000*282 = 5,640 GH/s. In total, around 6,377 GH/s, expected to be fully operational in the middle of August." taken from https://bitcointalk.org/index.php?topic=252531.msg2685502#msg2685502 July 08, 2013, 10:46:58 PM he has had this hashrate for a looooong time already - and it disturbs me that it is made to sound like having hashrate on the btcguild team is game-changer |
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We are really curious about this too....what would the optimum price per GH/s be for a used mining rig these days? $10 a GH/s seems to be the the lowest I've seen for some of the higher capacity rigs.....would that really turn any kind of substantial profit or would it be completely obsolete after 2-3 months?
thats terrible. You should be able to find an antminer used OR new for about $4-6/GH ($700-1200) |
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I don't see why you couldn't try a pencil mod on an S1. They just use a voltage divider to provide feedback of the output, so you'd pencil mod one to increase the voltage and pencil mod the other to lower it.
On the Antminer S1 that's R3 (8.2k) and R12 (9.76k) for the leftmost VRM, under the inductor. To make the voltage go up pencil mod (lower the resistance) of R12, and to lower the voltage pencil mod R3 instead.
Pencil mods are great for testing, or for minor bumps. According to my math, I would have to swap the 8.2k R3 with a 5.6k resistor, and that should bring the V down to 0.75? Anyone else want to double-check my back-of-the-napkin math? This weekend I'd like to grab one of our S1s, underclock down to 200, replace all 8 resistors, and then see what the power difference is. After that, I'd like to see how far I can OC on 0.75v before the hardware errors go >1%. pencil mods work well long-term, but be aware that they 'bake-in' and with age and heat the resistance lowers slightly from when first applied. In the case of pencil-modding bitfury cards I often had a card run fine for 6-24 hours after a pencil mod before getting to a point that it couldnt stay stable for more than an hour at a time. Keep that in mind and leave a bit of headroom when testing a pencil mod. Now that the right resistance/voltage is functioning on the bitfury, I am getting about 36-39GH per card |
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I'm really looking forward to getting some DPS-2000BB boards done and ready for testing. We should also have some DPS-800GBA boards in the works, which'll be handy for folks that are retiring Blade backplanes in exchange for other hardware. The DPS-2000BB boards will have integrated fan controllers (4-wire) with adjustable speed and two headers.
And within a few days we should have some test three-way-controller boards for hooking supplies in parallel and controlling them all as one. That'll take a lot of headache out of people trying to figure it out for themselves. The 10-pin headers on all our boards will be pin- and signal-compatible so the control board should work with all of the different supplies.
You're really, really tempting me to wire up a 220v outlet where our mining equipment is and switch over to these higher capacity beasts. I have a buddy who "was" an electrician for some time and would probably be easy coerced with beer to help me electrocute myself. Give me a reason not to pursue this please! 220V is worth it. most of your equipment will be about 2-5% more efficient and allows more watts per amp, which equates to significant savings over a few months of operation |
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not surprised its loud - look how many 40mm fans it uses! (7?)
A 3U or 4U unit using 120mm fans could achieve similar airflows with much less noise if scaling up. The dawson-30 will be a good example of this
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So I just got my first antminer s1 (yay!) and have it setup and hashing away.
Not overclocked, getting right at 180GH/s.
Checking the status page though, I'm a little perplexed - I see chain #1; but not chain #2 for the second blade .... but it has to be working right; with the hashing rate of 180?
I did a couple searches but haven't come across anything and all the other screen shots I see show both blades.
Also my Load numbers in the upper left are typically hovering between 2.00 and 2.30 ...but have seen them as high as 3... what do these specify exactly?
Just for some info:
each blade has its own power supply. One's a ThermalTake TR2 600w. The other is some Logisys 550 (3.3+5v+12v 400w / 12v@25A).
did a reboot.
tried different browsers.
have NOT done a reset.
Anyone have any ideas why Chain 2 isn't showing up; or if it is something to even be concerned with?
check the cords. its quite likely the little ribbon cable to the second blade isnt fully plugged in edit: just saw you are hashing full speeds.... that makes a cable issue less likely. If your pool reports the right hashrate as well i would leave it be, or try uploading the newest firmware |
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Here's my humble setup. [img ]https://i.imgur.com/fMrdIg2.jpg[/img] Keeping my kitchen nice and warm  You're not popping breakers running 6 Ants through one outlet? In a kitchen with other appliances? looks like 240V - either a stove outlet of just a 15A 240V outlet that is a little bit too close to its limits Its 220V. All my power outlets go trough 16A breakers as that is whats costumary here in Portugal. The watt-meter is reading 2650wt. So there is still margin. This circuit is shared with an A+ refrigerator and 2 other unused outlets. The oven, dish washer and clothe washer have exclusive breakers. I gotta say im getting a bit tired of the noise... im gettin some scythe ultra kaze 3000rpm for these babies soon... 16A at 220V is a maximum 3500W. Following safety guidelines for <80% load you should not have a constant draw of more than 2800W on it. If your fridge kicks on that would easily add 300-600W of draw but for a fairly short period of time |
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In case there is any feedback for me |
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I bought new equipment last week because i know it will be profitable. I expect to see a 20% gain over electricity costs by the end of the year
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