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mtminer, how much amperage are you pulling, and did you run new circuits to accommodate it? Or is that in some sort of office space that already has plenty of available amperage?
When I moved in there last year I lucked out and where a bunch of 20 amp 240 plugs but the rig outgrew that so recently putting in 4 30amp and 1 20amp 240 runs to clean up things as the extension cords where getting bit out of hand.
Currently the rig is pulling ~80 amps for everything.
18.5kw getting some voltage drop seeing about 230 volts at the computers.
~.07 per kw
~.07 per kw
Not too shabby if .07 includes taxes / fees / etc
Includes everything.
37 ghash...
so, i take it you're pretty much living off the mining then? or is the electricity too high?
so, i take it you're pretty much living off the mining then? or is the electricity too high?
Mining is a side business with a partner. I have it all pretty much automated and doesn't require hardly any time day to day to keep running. Mainly just monitoring and moving btc.
catfish: to compare to ztex, our dual FPGA boards are $560 each, or $280 per FPGA. His boards are $460 each with one FPGA. That's a big difference, eh?
It really just comes down to the design of the board that you prefer, though. I think all these boards look awesome, and it's great that people have some options, depending on their needs!
It really just comes down to the design of the board that you prefer, though. I think all these boards look awesome, and it's great that people have some options, depending on their needs!
Well no it all comes down to MH/$. While you may have 2 FPGA you are getting what 240MH/s combined.
Ztek gets 190MH on a single FPGA.
Also he offers significant bulk pricing. I wish he had a 4x FPGA design though. Building a 10GH cluster with 50 boards is kinda repetitive. Anyone looking to buy FPGA is looking to buy big. Whoever make the highest capacity board w/ lowest price per MH will be the one who gets the lions share of the business.
Good luck to everyone. May the best capitalist win.
Do you have a link for Ztek?
I want to buy all of them, I agree to your price. Do you have more than 50? Please email me at sales@gpushack.com
Check your Email.
couldn't find the "Picture of your mining farm" thread so i guess this will do.
phase 1
phase 1
Niiice
Was but the room turned into a furriness hitting 47Degrees, the A/C units are shit anyone any recommendations on cooling that doesnt involve proper DC grade heat extraction and recovery?
Its not hard, work out how much power (energy) you are pulling out and then get the equivalent amount of cooling power.
Heres some ideas to get you going:
Heat is measured in either British Thermal Units (BTU) or Kilowatts (KW). 1KW is equivalent to 3412BTUs.
Most aircon units are measured in BTU's so I'll work in that unit.
Equipment BTU = Total wattage for all equipment x 3.5
Room Area BTU = Length (m) x Width (m) x 337
Lighting BTU = Total wattage for all lighting x 4.25
There seems to be no windows, or people working in there permanently so you can probably leave those calculations out.
Total Heat Load = Room Area BTU
So you need enough aircon cooling to handle that amount of heat.
I'd say on equipment alone you would need minimum 100KW or 350K BTU's of cooling
It only appears that you have two of them, thats max 50K BTU if you have the most powerful (25K BTU) wall-split units, so you would need 14 of them.
100kw - 110kw of power you need to cool. (Took the power numbers from https://www.youtube.com/watch?v=OVQkQ37BGhk)
1 RT = 3.5168525 kW so you need ~32.1 I would round up to 35-40 tons.
That is two large CRACs and outdoor condensing unit. Most of the stuff has a 45-60 day lead time, plus budget 1-2 weeks of install. I would hire an engineer and get it done right. No real do overs.
Will these even work right without a true hold down?
I just got mine and I am a bit dazed. No cases for the controllers, none of the fans where hooked up, and then noticed they use the lid and plastic clips to keep the heat sinks on the chips.
Well that would be nice but I would be very surprised if they actually did. And I can't emphasize the "very" enough! Then I will have doubled my hash from 4THs to 8THs in one week (just got S2 today).
Nice! Good to hear bitmain are shipping on time. Knc could learn a thing or two from them 
I think its more tricky wording from them.
Customers will be contacted after 7 days, not that the shipping will start.
Customers will be contacted after 7 days, not that the shipping will start.
They say that "After 7 days from today the exchange will be frozen" and "The products will then be shipped from stock as soon as possible"
So the only question - how long is "as soon as possible"?
If they have these in stock, as they claim, then "as soon as possible" should mean straight away, right?
If it's in stock, then all they need is a UPS label.
I think we'll find out if knc truly had 400 "in stock" if they ship before the end of this week. Or whether they were misleading customers - again - with phoney delivery dates.
Its another dragged out delay tactic, all well planned.
Shipments could be April, May, June.
In the end I think they are grateful that they have somewhere to unload the older equipment, as they upgrade the datacenters to the Neptunes.
That would be pure evil if they did that!Shipments could be April, May, June.
In the end I think they are grateful that they have somewhere to unload the older equipment, as they upgrade the datacenters to the Neptunes.
I keep getting the run around from support trying to get the dimensions of the frankenjup boxes. Does anyone know? How can this stuff be in stock if they don't even know the size of what they are shipping?
Just a hint...
I had 3 very first Neptune orders.
I refunded them the day after this plan b bullshit.
Now I have 14+ th working....
What do you think?
I had 3 very first Neptune orders.
I refunded them the day after this plan b bullshit.
Now I have 14+ th working....
What do you think?
Antminers?
I will say at least they gave the customers a bunch of options for compensation. I have a hosting client that has a large order of these and he wasn't happy but was happy they gave him options. 5 week delay is major in ASIC-land.
How are you going to handle putting more than one card in a case if they require water cooling?
Curious, not trying to troll.
Devil's Advocate: The possibility that there could actually be some sort of tampering, and that he actually is right. Afterall, the Bitcoin Foundation has /a lot more/ to lose than 500BnUSD if that's the case.
but the malleability doesn't steal in itself.. it is just like making fake receipts. Mt Gox still had to process the second withdrawal via customer service. There is no way that a business goes bankrupt from the returns counter unless everyone is in on it or it is just a weak coverup.
This scam runs deep and once the FBI is finally done with their SR investigation we may know a lot more on this... it seems there are a few combinations of scam going on. Karpeles has been in denial or complicit for a long time.. probably a bit of both
The the resend on the withdrawls where fully automated. No CS was involved.
...but please tell me you will at least have room in the case for standard ATX power supplies. The tangle of wires on the outside of the machine is really quite ridiculous. It was understandable on the Jupiters due to the time constraints but there is really no excuse for it on the Neptunes.
Perhaps, but the reduced footprint brought shipping costs down significantly. I'll pass the concern on though.
Yeah, if we are talking needed 2-3 power supplies. Would be nice to install them into the case to keep the wiring clean.
I dont think you understand what Im trying to calculate here?
IM trying to figure out the hashrate where mining costs and income are in balance (for a given BTC exchange rate and for the current block reward). Thats just a number that depends on a lot of variables, but mostly electricity cost, energy efficiency, and to some extend, investment horizon, hardware production costs. There is no timeline on when we will approach this, there is no historical data to check against.
IM trying to figure out the hashrate where mining costs and income are in balance (for a given BTC exchange rate and for the current block reward). Thats just a number that depends on a lot of variables, but mostly electricity cost, energy efficiency, and to some extend, investment horizon, hardware production costs. There is no timeline on when we will approach this, there is no historical data to check against.
This has already happened at least once previously, when difficulty levelled out for a year or so until the exchange rate increased. Does your calculator indicate that would have happened?
What happened in 2012 was different. We mined with GPU's and gpu pricing is not dependent on bitcoin profitability. AMD (and nVidia) price their products for gamers mostly. They didnt charge huge premiums when GPU mining was highly profitable, and when bitcoin mining stopped being profitable, it didnt cause AMD to lower its prices. ASICs pricing will behave very different since they serve no other market besides mining.
Still, lets see what we get. Lets take January 2012
BTC exchange rate ~$5
Assuming most people were doing GPU mining. Lets take a 5870 @350Mh @200W at the wall.
Lets say it costed $250.
If I plug those numbers in I get a network speed of
In reality it was ~8000 GH.
If you take in to account FPGA mining, and given the range of possible outcomes of my current spreadsheet, thats close enough in my book.
All in, new equipment, psu, cpu, ram, cards, fans, and power distribution 1 gigahash cost ~$1,000. You could do cheaper with used cards but not in bulk.
Re: Anyone preordered the BFL Monarch PCIe card 600 Gh/s for $4680
There is already a thread on it here:
https://bitcointalk.org/index.php?topic=277901.0
The problem isn't what they promise. The problem is when will you get what you were promised.
Last summer, BFL made a promise to deliver hashing hardware in the fall that sounded like an amazing deal. They still haven't delivered that hardware over a year later.
You would be wise to pick a company that can actually deliver product without year long delays.
https://bitcointalk.org/index.php?topic=277901.0
The problem isn't what they promise. The problem is when will you get what you were promised.
Last summer, BFL made a promise to deliver hashing hardware in the fall that sounded like an amazing deal. They still haven't delivered that hardware over a year later.
You would be wise to pick a company that can actually deliver product without year long delays.
Which company can?
Yup 145 billion difficulty. That seems highly likely.
Tick Tock Tick Tock.. Hickory dickory Doc..
Break Even Period: 86 days Total Fixed Costs: $5150
Max Profit: $932 (May-14) - 18.1% Monthly Power Costs: $69.1
Month Difficulty (MM) Time per
Block (days) Monthly Revenue Monthly
Profit Cumulative
Return
Nov-13 272 34 $2,910 $2,840 $(2,310)
Dec-13 482 60 $1,640 $1,570 $(734)
Jan-14 853 106 $929 $860 $125
Feb-14 1510 188 $525 $456 $581
Mar-14 2673 332 $296 $227 $808
Apr-14 4731 588 $168 $98 $907
May-14 8374 1041 $95 $26 $932
Jun-14 14823 1842 $54 $-16 $917
Jul-14 26236 3261 $30 $-39 $878
Aug-14 46438 5771 $17 $-52 $826
Sep-14 82196 10215 $10 $-60 $766
Oct-14 145486 18081 $5 $-64 $7
Break Even Period: 86 days Total Fixed Costs: $5150
Max Profit: $932 (May-14) - 18.1% Monthly Power Costs: $69.1
Month Difficulty (MM) Time per
Block (days) Monthly Revenue Monthly
Profit Cumulative
Return
Nov-13 272 34 $2,910 $2,840 $(2,310)
Dec-13 482 60 $1,640 $1,570 $(734)
Jan-14 853 106 $929 $860 $125
Feb-14 1510 188 $525 $456 $581
Mar-14 2673 332 $296 $227 $808
Apr-14 4731 588 $168 $98 $907
May-14 8374 1041 $95 $26 $932
Jun-14 14823 1842 $54 $-16 $917
Jul-14 26236 3261 $30 $-39 $878
Aug-14 46438 5771 $17 $-52 $826
Sep-14 82196 10215 $10 $-60 $766
Oct-14 145486 18081 $5 $-64 $7
loooooooooooooooooooooool
1.5 Billion Difficulty in Feb - 12/PH
2.6 Billion Difficulty in March - 20.8/PH
4.7 Billion Difficulty in April - 37.6/PH
12PH is relational to 30,000 Jupiters
20.8PH is relational to 52,000 Jupiters
37.6PH is relational to 94,000 Jupiters.
If it would help you understand how stupid you are I would draw you a picture and use crayons.
Its only ~ 470 million USD. I am sure the forum warriors have that as pocket change.