Advice on Mining Farm Buildout

[Sandal_Hat]

Have you looked into renting space from a local colo? Won't have to worry about internet, cooling, insurance, security, etc.

Would the numbers for that make sense usually?

Btw, the antminer l3 https://shop.bitmain.com/productDetail.htm?pid=000201704270330299161GIIoSKl067B can do about 500mh hashrate for 800watts. This is for scrypt right?

An rx 480 is about 25mh for 140watts if i recall right.
That means only 150mh hash for 840watts

Gpu would nt be able to compete right?
Gpu and antminer l3 are for scrypr right?

[1714859193]

1714859193

[1714859193]

1714859193

[1714859193]

1714859193

[1714859193]

1714859193

[1714859193]

1714859193

[gwestcot]

No there is a difference between algorithms when it comes to hashrate. I am mining Equihash and I get about 2700 h/s with 6x 1070's. You get 13.7 Th/s with the latest S9 Antminer but that does not mean the antminer is better or more profitable than the GPU rigs. I try to stay with GPU mining because of the ability to switch between coins and also because I generally do not like ASICS. All that happens when a new ASIC comes out is the early buyers make out and then the difficulty goes up so high that the later buyers generally struggle to ROI. GPU rigs can also be liquidated much easier should you ever need to. 

[Elder III]

You're doing an operation at a scale much larger then I have any personal experience with, so I'm not sure how to answer your questions. I would definitely love to to hear from guys that have run commercial server setups and how they dealt with the heat, airflow, and electrical needs. Pictures of the process as you set it up too would be sweet.

We're having work done in our barn this month to make it a little more finished off and will be setting up some rigs out there once everything is ready. It will be a much smaller scale (working upwards to 13 rigs eventually) with a bit more of a redneck vibe to it I imagine.

[Shreyas2222]

Hey
I need help as well.
Where can I buy 50 graphic cards from?
I live in united states

[Elder III]

If ordering in bulk you could try www.superbiiz.com --- They don't ship as fast as Newegg or have as many sales, but you can order in bigger quantities. If you are going to order 50 at once you might want to contact them directly to see if they have a bulk discount.

[gwestcot]

I would probably go with a major distributor(Ingram Micro, D&H, etc) if you have a business license and if not then yes there are alternatives to purchasing large quantities of components for rigs.

[Sandal_Hat]

No there is a difference between algorithms when it comes to hashrate. I am mining Equihash and I get about 2700 h/s with 6x 1070's. You get 13.7 Th/s with the latest S9 Antminer but that does not mean the antminer is better or more profitable than the GPU rigs. I try to stay with GPU mining because of the ability to switch between coins and also because I generally do not like ASICS. All that happens when a new ASIC comes out is the early buyers make out and then the difficulty goes up so high that the later buyers generally struggle to ROI. GPU rigs can also be liquidated much easier should you ever need to. 

Yes but once this is in, litecoin mining is gameover for gpus and if it can be used for other coins, more gg

[zij]

Even with .11 per kwh on my electricity there is still 7000 dollars profit every month with 20 rigs.

My profit ratio works out to be roughly the same as yours with my current 10 rigs - but looking to increase that by another 20 when I can source the components which with motherboards and GPUs (RX480 range extremely difficult to get more than one or two at a time in England) being scarce.  I'm just signing a lease on some warehouse space about 1500 sq ft, so electrics, cooling etc are next..

[Sandal_Hat]

Why? Even with .11 per kwh on my electricity there is still 7000 dollars profit every month with 20 rigs. That is after the subtraction of electricity of the rigs, electricity for cooling, insurance, water, internet, and of course rent. I really was just looking for some help in regards to infrastructure since I have already ascertained that it is profitable to mine.

Have u tested this or is this your assumption with online calculators??

I pay .17 per kw/h and still make a fair profit. Based on actual power usage and actual hash rates from the hardware I have mining right now 

20 rigs as in 20 x 6 gpu? 120 gpu?

[gwestcot]

The Scrpyt miners you are referencing can mine no other algorithm other than Scrypt as far as I know. In addition, Bitmain has stated that they have two times the current hash rate in the first two batches which means that difficulty will substantially increase and payout will inversely decrease. I don't think ASICS will ever really completely trump GPU's because of this issue. With GPU rigs you at least have a barrier to entry that requires some technical knowledge. ASICS are simply plug and play.

[Sequoia93]

Hey OP, what kind of cooling setup do you have for that many GPUs? (240 right?) I saw that yun9999 has two 5000CFM fans in his garage in Texas for about the same size setup (i think). How are you dealing with the Florida heat/humidity? And whats electric like there?

[gwestcot]

Hahaha well it is in my initial paragraph but I will repeat it again. I will purchase a 30 ton Liebert down flow CRAC unit that will take the return air from ductwork at the top and distribute cold air from beneath the raised flooring. I will be doing the hot aisle/cold aisle setup used in most modern data centers. Essentially the hot aisles will have the return vents and the cold aisle will have 55% high air flow grates in the floor that will then feed all of the miners with cold air. 1 kwh=3517 BTU's of cooling and there are 12,000 BTU's per ton. I have enough room to put 40 additional rigs in that room before I will need to add another 30 ton unit so it leaves me with some room to play. The price of electricity is .11 per kwh and as far as humidity goes it is regulated by the CRAC unit which is also usually used in data centers. I could go with the traditional fan setup but I am going for efficiency and sustainability so I am willing to pay more for the initial setup.   

[newtybar]

For goodness sake...the guy is asking about logistical advice with regards to infrastructure set up. 

Random off topic questions or statements questioning his profitability or choices on what to mine is not what he is looking for.

I planned on following this thread to learn, but felt the need to say something.

[Jamievs]

For goodness sake...the guy is asking about logistical advice with regards to infrastructure set up.  

Random off topic questions or statements questioning his profitability or choices on what to mine is not what he is looking for.

I planned on following this thread to learn, but felt the need to say something.

Amen! The topic starter is living my dream man. If I had the funds to go big I would in a heartbeat

[gwestcot]

Thank the lord there is someone out there! I have done a lot of research regarding infrastructure but the wiring of the PDU's was the only thing I did not understand much when posting. If you really want to learn how to do it professionally then I could suggest some literature that helped me but you will have to wait until I get back home for an author and title.

[thenite0wl]

does any one have input on this subject?

i'm wanting to increase the size of my small farm but the power limits at my house are preventing that (100amp, no 240v). there are commercial lots available nearby that offer 480v 3 phase power. i have very little knowledge of how to run 12v gpus on this type of power. i mostly buy pc power supplies and so far only run them at 120v. A quick search for 480v 3 phase power supplies shows some but they output 24v and are expensive. most servers run on 208v? and i've seen the server power supplies converted for gpu's with the breakout boards and custom wiring, but what is needed to connect even that setup to 480v 3 phase? i doubt there is any inexpensive way to do this except maybe by second hand server equipment. so any brief explanation of how people have powered their mining farms would be appreciated. thanks

[gwestcot]

You should get a PDU that has voltage step down from 480V to 208V. This is very much so in the tolerance of most PSU's. Most PSU's, if you look on the label or in the booklet, will accept anywhere from 100V to 240V. There are some fairly inexpensive used options that are large and would get the job done. This is an example that would work and it would provide you a lot of room for growth depending on how large you are building out a space.

http://www.ebay.com/itm/2005-Liebert-PPA225C-225KVA-PDU-480x208-120V-3-GE-42-Pole-Panel-Board-/331614725189?hash=item4d35c72445:g:eb0AAOSwrklVXkwu

[btcgolong]

Hello everyone! I am now attempting to move from home mining into a 1250 sq ft warehouse. I will increase my mining from 5 to 20 6x GTX 1070 zcash mining rigs. The rigs are rack mountable and will be installed in 42U racks. I am also going to have 3 phase 480V service installed at the maximum amount of amperage allowable by the power company. I have read up quite a bit on data center infrastructure which seems to be similar to a mining operation. I will have raised floors with the cooling initially being done by a single 30 ton Liebert downflow CRAC Unit. Additionally, I will be using a hot aisle cold aisle setup to maintain air flow efficiency. My main issue is in my lack of knowledge with power distribution. Unlike a data center, I do not initially care about redundancy and backup power because of cost considerations so a single flow of electricity is fine by me for my first setup. My main question has to do with how the large 225+ kvA PDU's are installed. Do they wire into a main distribution panel or do they feed directly into a service line? My single line was hard to plan because I lack the knowledge. It was supposed to go service line-->panel-->PDU's (480V to 208V/120V)-->Vertical metered PDU's-->Mining Rigs. I will also have all my wiring, patch cables and electrical conduit run through cable trays above the racks. If you have any information that could help me with power distribution or the overall design of my medium sized farm then I would be very thankful! Have a great day!     

I'm going to talk to my electrician friend about your issue. But I also want to ask you a question, how long of a lease are you signing? Do you have any concerns about the loss of profitability and being locked in a lease?

[gwestcot]

Hello everyone! I am now attempting to move from home mining into a 1250 sq ft warehouse. I will increase my mining from 5 to 20 6x GTX 1070 zcash mining rigs. The rigs are rack mountable and will be installed in 42U racks. I am also going to have 3 phase 480V service installed at the maximum amount of amperage allowable by the power company. I have read up quite a bit on data center infrastructure which seems to be similar to a mining operation. I will have raised floors with the cooling initially being done by a single 30 ton Liebert downflow CRAC Unit. Additionally, I will be using a hot aisle cold aisle setup to maintain air flow efficiency. My main issue is in my lack of knowledge with power distribution. Unlike a data center, I do not initially care about redundancy and backup power because of cost considerations so a single flow of electricity is fine by me for my first setup. My main question has to do with how the large 225+ kvA PDU's are installed. Do they wire into a main distribution panel or do they feed directly into a service line? My single line was hard to plan because I lack the knowledge. It was supposed to go service line-->panel-->PDU's (480V to 208V/120V)-->Vertical metered PDU's-->Mining Rigs. I will also have all my wiring, patch cables and electrical conduit run through cable trays above the racks. If you have any information that could help me with power distribution or the overall design of my medium sized farm then I would be very thankful! Have a great day!    

I'm going to talk to my electrician friend about your issue. But I also want to ask you a question, how long of a lease are you signing? Do you have any concerns about the loss of profitability and being locked in a lease?

I am presently not concerned at all about the long term viability because profitability could go down 2 to 3 times and it would still be fine. I have seen warehouse space in my local area that has a 1 year lease so that is not a problem as well. The main issue with being locked into a long term lease is that you may outgrow your space and need to move but are unable to do so. The main thing is getting the utility company to install the proper transformer and line to supply 480V 3 phase. I will say that from my research it is a lot cheaper if there is a pole that is within 80 feet of your warehouse.

[Marvell1]

its not even the cost of installing it, i am adding 600 amp service to my gargage
single phase but they still need a separate transformer forcthat much. load they install it for free
but you need a city permit for the tansformer and that can be denied or take months to aprove
I had them go ahead with the permit request a d they chaarged me $300 for the permit said it it was approved
 there would be no further charges