Launching a 6000 mh/s ethereum farm. Q&A Thread!

kotariuskotarius Member Posts: 331 ✭✭✭
Hello All,

We are launching a 6000mh GPU farm for mining ethereum. Please ask questions, and the site will be updated with answers!



  • theneogeo1982theneogeo1982 Member Posts: 530 ✭✭✭
    I'm more curious about electrical
  • kotariuskotarius Member Posts: 331 ✭✭✭
    Thanks for your question. Added information. I can delve into specifics.

    The breaker panel provides 150A 240V service. To get the maximum amount of rigs that can run:

    Amps * Volts * Power Factor (150*240*.8 = 28,800 continuous watts).

    Since we are provisioning 50 rigs, each one taking 1000W, we need the help of the adjacent unit. Therefore, our electrician is running circuits six 30A L6-30R circuits from our panel, and four 30A l6-30R circuits from our neighbor tenant. We have an agreement to pay for the power that we use from the neighbor's panel.
  • shutfushutfu Member Posts: 320 ✭✭
    edited July 2016
    why now, so late in the game? seems like a pretty significant bet on the price of ethereum going up to cover your return on investment before mining ends.

    Do you plan on mining other crypto as well?

    What miner program will you be using? genoil? claymore (dual mining?) ?

    also I assume since you are using 1000W to power a rig, they are going to be 6x RX480 each? if not, what card?
  • kotariuskotarius Member Posts: 331 ✭✭✭
    Our plan is to mine Ethereum and autotrade to BTC using 50 rigs. Each rig will have four r9 290s.

    Going to be using ethOS, which runs genoil.
  • theneogeo1982theneogeo1982 Member Posts: 530 ✭✭✭
    Is it better effiency or power to run 240v instead of 110?
  • mjaaaymjaaay Member Posts: 97
    Why r9 290s? Assuming POS comes in a year~, wouldn't you be better off getting RX 480 for the resale-ability factor?

    Also, why now?
  • kotariuskotarius Member Posts: 331 ✭✭✭
    edited July 2016
    We already had the hardware. RX 480 is selling 50% over MSRP, so we would not buy them for that reason.

    After MSI, Gigabyte, Sapphire, etc, release their version of RX 480, no one will want the reference versions. So, the the drop in value will be significant.
  • sling00sling00 Member Posts: 11
    Ref 290s also have a cooling advantage in the density that is proposed because of how the intake/exhaust is setup. Even though its not the BEST design, it was designed to be stacked tightly, which is advantageous in this situation.
  • workwork Member Posts: 2,084 ✭✭✭✭
    @theneogeo1982 yes, 240V is more efficient then 120V
  • BUTUZBUTUZ Member Posts: 139 ✭✭
    edited July 2016
    Ref 290s are great cards. They can be made to be very powerful, or very efficient depending on your electric price and cooling needs.

    Congrats to the OP this looks like a fun project if you're electricity post is low then it should be profitable for you!

    I would recommend don't auto sell 100% of you're eth, keeping 10-20% of eth mined in a wallet and then sell in a year when the price is double or triple or. ...... 10x give you a nice extra profit.
  • th00berth00ber Member Posts: 213 ✭✭
    @kotarius R9 290 have a great hashing power but also very power hungry.
    Have you do some tweak and tests, what is the sweat spot you found on your R9 290 (ratio Hashrate / watt)
    I may planned to buy some R9 290 on a refurbished deal and I would like to have some informations from people more skilled than me with this model :)
  • SmokyishSmokyish Member Posts: 203 ✭✭
    So now your plan is to not even support Ethereum per se, but to dump large amounts to the market automatically?

    So EthOS and your mining operation is just a way to feed your Bitcoin habits?
  • th00berth00ber Member Posts: 213 ✭✭
    @Smokyish So you think that the big farms will buy hundred of GPU and dozens of PSU/Proc/Mobo, then rent a place with air conditionner and high power capacity ... then face a high daily cost of electricty used.
    All of that represent thousand of $$ and just hold the ETH in case it go higher in a year or two ??

    They HAVE to sell a big part of the mining they earn, just to ROI and pay for the mining fee (building, electrity etc...)

    It's just the individual miner that can hold all the earning.
    For exemple, with the electricty price I have, I know that I have to pay 100€ for the electricity my RIG is using (7 cards, 140 MH/s). But I still hold a big part of my ETH and accept to pay the bill witout cash out :)

    @Kotarius speak about 54 rig of 1000W, wich mean 54000W/h 24/7
    at my local electricity rate => 54 KWh * 0.15 €/KWh * 24h * 30 days = 5800 €/month for the electricty
    (But I hope they have possibility to have cheaper electricity :P)
    And for a estimated income of 15000€/month at current price and diff
  • SmokyishSmokyish Member Posts: 203 ✭✭
    1. ROI isn't a primary focus:
    We already had the hardware.
    , so they loose some income from not selling them, but it's older hardware that they already had in storage.
    2. Of course bills have to be paid, but ETH/USD is also an option besides ETH/BTC.
    3. Auto-dump isn't necessary to pay your bills.
    4. If everything has to be dumped to pay for the bills, it's not making any profit, so why even do it? You yourself said that you only need to convert a portion of your ETH to pay for bills.

    I never said that one would have to hold all ETH mined, my concern was auto-dumping everything for BTC from a 6GH/s operation.

    That seems like a very clear indicator that the entitity doing so, has no stake in Ethereum, doesn't wanna hold any ETH for future usage when the project matures and is just trying to profit from the project without any concern for it's future. They seem to care more about making money and supporting BTC than ETH.

    And yes, of course they can convert BTC back to ETH later, but doing so, they will have to pay double fees, one for each conversion, so it's less economically viable.

    And auto-dumping drives down the ETH price, because it doesn't care about the value, other than to quickly see the conversion done, so that amounts to ETH down, BTC up.
    Parameters to do this otherwise can be used, and this is why i was asking the question earlier.

    They are a company that wants to make profit, it just doesn't seem like they have any real long-term interest in the Ethereum project, rather than on Bitcoin and their hardware business.
  • densetsdensets Member Posts: 69
    @Kotarius its beeing 10 hours already. is the farm done yet? i need mi rigporn fix for today.
  • dlehenkydlehenky Member Posts: 2,249 ✭✭✭✭
    @Smokyish Just keep in mind that he's running/building a business. There are other bills to pay than just the actual expenses of the farm itself. just sayin'. :)
  • Marvell9Marvell9 Member Posts: 593 ✭✭✭
    Its a no brainer if you already have the hardware
  • SmokyishSmokyish Member Posts: 203 ✭✭
    @dlehenky I understand the business side, but this is the official Q&A, so i'm asking questions, i'm interested in the motives and rationale behind their/his decision :)

    And as i pointed out, auto-dumping can be altered to buy at higher prices instead of lower, it is possible, that's why i'm asking questions.

    The bills can be paid with ETH to USD too, there is no actual need to convert to BTC, that is one thing i'm trying to point out.

    Won't "devs" accept ETH as payment? Do they accept BTC?
    What about the landlord, does s/he accept BTC as payment besides USD?
    Does your hardware supplier accept BTC as payment?
    Why are you investing into Ethereum development via EthOS and Eth mining if you have no interest in actually holding and/or using Eth for anything?
    Why don't you mine something else, atm FTC seems more profitable than Eth mining?
    Is your only/main reason for doing this mining farm to advertise/promote EthOS?
    Why won't you accept ETH as payment, but do accept BTC?

    These are some of the things in which i'm interested, is the company actually interested in Ethereum in any way or just trying to profit from it in the short-term and their main focus is on Bitcoin and the hardware business.

    Personally i'm just interested in the cryptocurrency scene and how things work within it, i think that there are many interesting projects that could be benefitial to everyone in the future. If someone wants to use some technology over other to make a profit and run a company, that's fine, but their motives, reasons and actions are interesting in a way to see what drives people. In this case, kotarius is being very open about his operation, so it gives a good opportunity to learn about his motives.
  • kotariuskotarius Member Posts: 331 ✭✭✭
    edited July 2016

    We are holding enough Ethereum to be ready for staking in the future. When choosing a coin, it is important to look at its trading volume and market cap, so that mining and autotrading does not negatively affect the coin price. FTC has a 1/400th market cap compared to ETH.

    I thought it would be cool to document how to build a 50KW farm, and to share my knowledge about that.
  • Marvell9Marvell9 Member Posts: 593 ✭✭✭
    @kotarius what do you pay for power ? This project should be quite interesting to watch, I used to run a semi large farm 2700 mhs with around 20KW used , for 6000 mhs you should be able to run at around 45KW

  • AmphAmph Member Posts: 106
    good luck filling ethereum classic nethash, it's good that right now there is another fork that can sustain another 300k gpu, so other coin remain with low diff
  • kotariuskotarius Member Posts: 331 ✭✭✭
    @Marvell9 The power cost is .08c/kwh. The R9 290s use a bit more power/hash than other GPUs, so that is why the power usage is a bit higher than expected.
  • HeKazHeKaz Member Posts: 9
    Where are you located if it is not too much to ask.

    This is the same price I pay so I wouldn't be surprised if your were from my neck of wood.
  • Marvell9Marvell9 Member Posts: 593 ✭✭✭
    kotarius said:

    @Marvell9 The power cost is .08c/kwh. The R9 290s use a bit more power/hash than other GPUs, so that is why the power usage is a bit higher than expected.

    Thats a good power cost, are those summer rates ? if so your winter rates will be much lower if in the US.

    I have .15c/Kwh here in the midwest in the summer but it drops to .08c in the winter
  • kotariuskotarius Member Posts: 331 ✭✭✭
    We have the same power cost all year.
  • PMmeyourBTCPMmeyourBTC UK BristolMember Posts: 50
    Please keep us updated with pictures, love pictures of farms!
  • th00berth00ber Member Posts: 213 ✭✭
    @kotarius Have you an idea of the optimal power consumption of the R9 290 for a nice ratio perf/watt ?
  • kotariuskotarius Member Posts: 331 ✭✭✭
    Added picture of drum fan watts.

    R9 290 should use about 250W and run at 29mh. After flashing to a stilt bios, I will do some further investigation.
  • colinthemackcolinthemack Member Posts: 5
    edited July 2016
  • newmznewmz AustraliaMember Posts: 299 ✭✭✭
    damn! you guys are so lucky wherever you are paying that amount for power! Down here in Western Australia I'm paying about $US0.17/kW.
    So even Kotarius is into the stilt bios huh? What is it's advantage?
    I have direct 240v power but in an old house so I trip the breaker sometimes if I don't for example turn off one of my rigs when I use the dishwasher. :( One circuit for the whole house... sucks.
    Good luck Kotarius!
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