Bitcoin Forum

The front

https://i.imgur.com/ndHoGAu.jpg (https://i.imgur.com/ndHoGAu.jpg)

The back

https://i.imgur.com/gpRkltS.jpg (https://i.imgur.com/gpRkltS.jpg)

I have now about 30 Asics in this room, still have room for a few more that i am getting in a few days.

I used MDF 16mm to divide the room into 2 smaller rooms , used a CNC router machine and trilled squares of 121 square mm, so i could easily insert the fans, then dealt with the 1mm with tapes to try and perfectly isolate the the intake from the exhaust.

difficulties i faced:

1- the alignment of the rack , as i used cheap racks to save cost, and they are not very flat, neither was the floor, i knew this from the start so i had my initial design on the CNC to keep a margin to the downside, as i can lift the miner up by putting anything under it but cant force it down ! , so it made more sense to do it this way, that's why you can see some miners sitting on a small peice of wood " the left-overs from the mdf sheets i used".

2- the initial work on the CNC machine, it took me sometimes to perfectly align everything all together, the metal poll in the middle "visible on the second picture"  was taken into consideration while drawing the design which made it less efficient, but still worked. the pole was important as the size of the mdf sheets i had access too were either not large enough to cover the whole space or too large to sit on the cnc table, therefore i had to cut it two 4 pieces and used the pole to hold it.

advantages of the current set up over the previous ( before the split)

1- the miners run cooler as most of the hot air has no way to go back to the intake
2- way less noise
3- potential of better and easier use of the hot air in the hot room ( maybe put a few egg incubators in it and they will crack in hours  ;D )
4- in the summer it gets extremely hot here, up to 45 degrees c  is normal  >: , oh that is (113F for fellow Americans  ;D ) ,,so no matter how much airflow is put, they will still get hot, so i have to use an AC to let the miners inhale  ::) some cold air or they would melt. this was not possible in an open room as i would need a dozen of ACs to beat the hot air,but now i only have to beat the ambient temp which is enough by using a single 24000 btu AC

so you can actually use anything to isolate, whatever is cheap and at your disposal.

* I have very cheap power rate so i could care less about an AC running 24/7 in the summer, and the ACs here are designed to do so.
* i know the spacing is too much, but i had a lot of room with FIXED power, so 40 miners will be it for this farm, an upgrade is NOT possible  >:(

i did all the wiring myself, including the electricity, if you have any question regarding that , feel free to ask.

cheers.

---

Farm no.2

So here comes the second farm, actually it's the first but i haven't had the chance to share it with you guys, so i had to manually reset one of the miners today and decided to take a few photos and share my humble set up.

The set up is pretty similar to the other farm > https://bitcointalk.org/index.php?topic=5087770.0

but this one is a a lot smaller.

so here is the view from the outside

https://i.imgur.com/Gn2ssqc.jpg (https://i.imgur.com/Gn2ssqc.jpg)

i used gypsum board to build this small farm, don't ask why , i always use the cheapest martial i have at my disposal  ;D

same split set up. hot room to the left, cold room on the right ,notice that i don't have an easy to open door for the hot room since i don't need to in there often.

https://i.imgur.com/YEUZkPM.jpg (https://i.imgur.com/YEUZkPM.jpg)

here is a view for the racks

3 rows, each row takes 4 miners, there is currently only 8, i sold the other 4 for a good price, bought another 4*s9s should be here in a week or so.

https://i.imgur.com/nDEkT07.jpg (https://i.imgur.com/nDEkT07.jpg)

here is the 2 intake fans, they are not industrial , just the once you would use in a kitchen, and they are doing pretty good, i have 3 of them attached to the roof to exhaust the hot air from the hot room, sorry i forgot take a picture  of those, but they are the same exact once.

https://i.imgur.com/5I9xSPx.jpg (https://i.imgur.com/5I9xSPx.jpg)

and here is the main and sub circuit breakers

https://i.imgur.com/txswRGc.jpg (https://i.imgur.com/txswRGc.jpg)

so the main cable that runs to the main breaker is 16mm2 (5awg) , the main circuit breaker is 80 amps at 220v it should handle 17600w, but i am only consuming something below 15000w.

https://i.imgur.com/qgoqsYW.jpg (https://i.imgur.com/qgoqsYW.jpg)

I have 4 MCB of 25amp each , 1 is for the AC , and every 4 miners are connected to 1*25 MCB ( 3*4 = 12 miners).
the 16amp MCB  is used for the switch and the fans.

you can see in the image, there are 2 wires  going out of each MCB, every wire is used by 2 miners, the wire is 6mm (9awg).

so every wire goes to 2 plug sockets as shown in the image below

https://i.imgur.com/ejpyJnt.jpg (https://i.imgur.com/ejpyJnt.jpg)

i use those sockets only to cover the wires, i am not a big fan of using plug sockets for over 1kw , i cut the end of the psu cable, and joint it directly to the cable using the same blue joint kit that you can see in the image of the circuit breakers, the initial set up was using those outlets but then i realized that it was a bit risky as those sockets were not very good quality.

some people  think it's not the best practice, but i don't always good by books, i prefer real life experience and practice, and jointing the miners that way has always worked well for me, i had bad luck with using outlets/sockets, but not a single problem using these joint kits , plus i get to save some money with this set up.

also notice that wiring + breakers set up might not be something that people who go by the book agree with, but this has been going well for over a year and not single problem.

the total cost for building this was about 400-500$ from scratch to end including just about everything except for the miners of course.

edit: the place is quite dusty, am planning to clean it this weekend  ;D

Nice setup. What are you using to suck the hot air out of the hot room?

a single 600mm2 exhaust fan which i think is about 70cmm or 2000cfm

i have to guess because it is a second hand with no label what so ever  ;D and it is doing the job just fine, also when it get's very hot and i have to increase the fans rpm( of the miners) i simply open the door of the hot room to allow some of the hot air to go outside, the intake for the cold room is on the opposite side so the hot air has noway of going back.

i know many people say that you need at least 150-200 cfm for each miner which means i will need about 200*40 =8000 cfm but really for this set up a single fan is doing the job, in fact it stopped working once so i had to rely on only the pressure of the miners' fans to push the hot air out of the door and temps were not even that high, i think as long as the hot room is large enough then there is plenty of room for the hot air to find it's way out. i know this might not make sense if you would go by the BOOK , but it's working for me

https://i.imgur.com/2sRVWM8.jpg (https://i.imgur.com/2sRVWM8.jpg)

I will take more pictures when i set up the coming miners to give  you a better overall view.

You’ve posted about the hot and cold wall in my mining farm thread. I’m up to 38 miners now with another 10 en route. I was hitting the 80s on my miners with 25 machines last summer during 90 degree days. I’m sure I will need to build this same wall to avoid overheating in the summer with 50 machines. My upblast fan is rated to 30000cfm. I’m thinking if I build the wall halfway up (15 feet on a 30 foot ceiling) it should direct the hot air high enough where the fan should just suck everything out. What are your thoughts on that approach?

if i remember correctly you have quite a large space,  15 feet is more than enough, depending on the width you going with.

if you want to have a decent spacing like mine, then all you need is 11.5 feet of height, which is about 3.5 meters ( same as mine)

with this height you can have 5 rows and the space from the highest miner to the roof will be about 5 feet which is good enough.

here is the initial design
 
https://i.imgur.com/c3JRGtn.jpg (https://i.imgur.com/c3JRGtn.jpg)

of course having a higher ceiling is better if you do not plan to exhaust air through the ceiling  , because if you do, then what matters more is the space from the mining room ceiling to the main room ceiling, if you planing to suck the air out from one of the sides, then the higher the ceiling the better, but i still think 5 feet from the top miner to the roof top is more than enough.

also with 30000cfm i am sure the hot room will not be too hot  ;D , but you will need to have a large intake fan in the cold room, facing the opposite direction of your exhaust fan , because the air pressure created by the 30000 cfm along with  miner exhaust fans will be too much for the miner intake fans to handle, they will be spinning at high rpms and the pressure in the cold room will be so low, like latterly you will not be able shut the door of the cold room if it opens to the inside, it will feel like a very strong person pulling it from the inside, therefore you need to force at least something close to 30000cfm to the cold room, which does not have to be a single fan, maybe 10000cfm fan and make a few holes on the side of the wall of the cold room for air to come in easily.

sadly it's far from home  :( , but you can actually roast a whole chicken in the hot side of the room  ;D


oh the majority of the miners are not BTC miners, but if you asking about BTC mining i use ck pool and slushpool. i never liked antpool to be honest.

also i don't see how would you lose by mining at those pools unless the luck happens to be so bad while you were mining ( assuming it's not PPS) or they are simply scamming you. I had zero problem with slushpool and ckpool.

for the non btc miners i usually stick to nicehash, for mainly 2 reasons.

1- i get paid straight in BTC
2- the payout is usually higher for God knows why " probably the noobs over pay to rent hashing power on nicehash to mine shitcoins" or could be people like BCH buying the hashrate to win the war against one another, but i could care less as long as the payment is good. ;D

Essentially mikey is saying you need to ensure static pressure.

Jeeze whereabouts are you that 45C is normal?

We get hot and humid summers in southern Ontario and as long as their was managed airflow there was no need for AC. But agree that introducing some cold air will maintain the health of the miners long term. Easy to calculate your overhead and stay profitable.

very close to the sahara desert "no joke" ,  if power is dirt cheap AC is the way to go i the summer, if not the you will need to move a ton of air around the miners when it get's really hot. it's just a matter of everyone own abilities.

cheers

You may want to look into what are known as swamp coolers, assuming you have access to a cheap and readily available water source. Very efficient cooling, especially when the air is very, very dry like I would imagine the region near the Sahara to be. If it also happens to be humid, then these will not be very effective.

Swamp coolers are rather expensive here, they will be a perfect solution but honestly i am not looking for perfection, i am trying to keep the cost as low possible, it's also that most likely that mining asics will be outdated before going bad, so i see no need in providing the perfect cooling method for those soon to become paper weight, i always try to roi asap, because you may never know what could happen next week.

Very nice set up man but hey you must cover those small opening under the exhaust fan for a better suction of the hot air. Be sure to cover any open wall and windows inside the hot air room.

would you please explain how will covering the open area around the fan will increase suction? i think fans are rated at x amount of cubic unit they can suck, so regardless , they will only suck what they can , some of the hot air will go through those spaces which supposedly slightly  better with than without them, i am a newbie when it comes to air follow/pressure/ventilation. i only do trial and error and have almost no solid numbers based knowledge, so i hope you can explain. thanks a lot.

Hello, I will give you a more simple explanation. If you were to drink a bottled soda ,which are the easiest way to drink it, sucking it with one straw inside the bottled soda OR sucking it with 2 straw with one straw inside and one straw outside of the bottled soda ?

Just remount the gable to some plywood that fits over the entire open area, cut out of course for the fan. Essentially your removal will be more efficient.

Oddly enough you might need some of the heat to control humidity, makes for a fun discovery after taking so much effort to isolate the hot air...
Still, very nice setup!

How many amp do you have access to, and how much is a KwH there?  My poor house's 100A feed is maxed.

it's 3 phase , i have roughly 75amps on each phase so more or less 225amps in total

No, you still just have a total of 75 amps but with a 3rd leg feeding the panel you do get to pull 1.732x more watts from the panel.
ref http://www.oempanels.com/what-does-single-and-three-phase-power-mean

i am already consuming  well over 150 amps. the link you sent me only applies to USA old Electrical infrastructure.

for the the rest of the world ,it's a whole different story.

3 phase means this :

you get 4 wires ( 1 neutral and 3 hot/live )

between every N and L you get 220v
between every L and L  you get 380V

so in my case I have either

75amps on 380V.
or 75*3 on 220V.

depending on how you deal with the cables, you can have both 380v and 220v.

so what i did is this.

I bought 3 main circuit breakers
each has a hot wire attached to it.
N wire is shared by the 3 phases.

just in case my explanation is hard to get > read this > https://hotkilns.com/what-difference-between-220-volts-3-phase-and-380220-volts-3-phase-overseas-applications

they refer to this standard as being used in


very poor choice of words to say the least, it's more like  like " The Majority of foreign countries"

nicely done! I can see how the wall might be beneficial in a large area - my area is not that large so I vent my miners directly outside - they are placed about a foot away from the inside wall with a 6" dryer vent pushing the air outside - I have dehumidfier to help with humidity and a fan pushing about 2500 cfm (used to use an ac unit but found it could not keep up with needed airflow as I added more miners. Also the fan seems to cost less to operate as well.

I do not feel comftable revealing how much profit do i make, although i would if it had any benefits to the members, but i know it is useless simply because

1- the power cost that i have is nothing like yours.
2- the maintenance fees.
3- the strategy i follow to use the mining generated profit which some of it goes back to more hashing power

i can make a longer list of how irrelevant these information are, people have different electricity rates, different everything adding to this the nature of the crypto market , profits will vary drastically from month to another. you simply need to make your calculations based on your own factor, as of how much I or anybody else make from mining is really of no use to you at all.

use these mining calculators, they are fairly accurate.

www.whattomine.com
www.coinwarz.com

set the required parameters,get your results with a click.

if you have any specific question i'll be happy to answer it.

you should look for a cheap power source, generally speaking anything above 6 cents per kwh is bad.

think of mining as a group of people who buy airplane tickets at different prices ( sourcing miners) , then they all go to the top of a hill where there is a lot of money on ground, and then they all need to walk towards the cliff while collecting money from the ground, the walking speed is the electricity rate, the more you pay for power, the faster you have to walk to the cliff, and once you fall, you might not have collected the ticket price ( the miner cost) if you walked too fast.

Yes  ;)

Wonderful setup. Hope you are up and running on all your miners now. Did you end up adding another exhaust fan? and also would be great to see your panel box with 3 phase connection if possible.

I added a few photos for my other mini farm, as well as a bit of wiring and set-up information.

you need to have basic knowledge about electricity, there is no control z in electricity, one mistake can cause you your life or put something on fire. unless you have basic knowledge about wiring you should hire someone, you can use my set up as a guide to show to the electrician, but by all means do not attempt this yourself.

Hey mikeywith,

Are you planning one day to make a wire perfectionism ? Something like that. This will definitely cause some orgasmic feelings on this forum part  :D

https://earthporm.com/wp-content/uploads/2015/07/perfection-64__605.jpg (https://earthporm.com/wp-content/uploads/2015/07/perfection-64__605.jpg)

I would have something like for a client " paid job" , i do some dope network wiring when i am going to get paid  ::).. but when i do something for myself i always focus on getting it to work and don't really give much weight to how it looks.

It looks like a great setup; How are you venting the PSU's? I am doing something similar but not isolating the Hot side because fo the PSU's, simply relying on the air flow.

hello , but the swamp coolers make it very very humid , dont u think that it will shorten the server life ?
i want to build a farm and it is possible for me to use swamp coolers and it is not humid in my region but again Im afraid that moisture will harm my servers

moisture is bad for almost everything , but with swamp coolers you save on power , also you mentioned that it's not humid in your region, then swamp coolers should work great for you, but then you need to watch the level of humidity.

i am not an expert in this field, most of my past experience is trial and error, i hope someone who has more experience will provide you with a better answer, tho i doubt that the information you provided will be enough for a perfect advice.

just one question bumped into my mind ,about your miners you have separated cold and hot room , some how your miners are still in the hot room their body will get hot , what about putting them in the cold side and just let the blower fan blow out the hot air to hot room  in this case the miners wouldn't be cooler ?

This is how i do it anyway, look closely at the pics.

I still don't see how you are venting the PSU's

I don't , they don't produce enough heat for me to worry about. as long as the heat that comes from the miners is taken care of, psus should not be on the list of problems.

I have seen many people simply let the exhaust of the PSU go inside the miner, that extra warm even helps lower humidity a little.

True, a bit of heat is good , another reason is the that apw's wires are not long and flexible enough to allow you to easily eliminate the heat comes from psu, it is doable , but not easy at all.

Mikey, I've been meaning to ask. Did you ever go all in on Mining gear and expand the farm with that cheap power deal? Or did you go the other route and amass coins?

Trying to catch up with a few people who were thinking along the same lines to see who decided on what.

sorry bud i just saw this, if you mentioned my full username i would have been notified by piggy's bot  ;D.

okay what i did was actually reduce both risk and reward , i had to pay a lot more per miner (of course this includes other expenses )since the numbers i had in mind required a certain amount of gears, so i went in with like 40% instead of 100% , ROI got extended by about 1.2 months based on the initial plan, but with the price rising i am still aiming for about 3 months ( or just a bit more )

i can't say i regret not going all in, , because the btc hodling increased too (dollar wise) , to be honest i am too lazy to do some the math that would suggest if my decision was the best or not , but i am happy with the fact that for once i could resist the temptation of going balls deep into mining.

I'd say you made a good choice overall, nothing wrong with spreading it out a little in case we weren't in such a great situation right now, if only we could see the future. Good on you for not giving in to the temptation, it's tough when everything on paper says do it. Not going to lie, when you were talking about this I almost hit you up with a proposal to buy/host with you - essentially try and insert myself into your plan if you had space. Then I took a breath remembered I had just upgraded everything mining at the house and held off on asking. Finally starting to rebuild some of the reserves, which feels nice especially at these prices.

If you get a chance ever you should throw up a few pics of the "Gold Rush" setup.  - Get in and grab what you can fast.

I always forget about the Bot, and now realize why I couldn't find your thread - it moved.

When in good times, plan for the bad times. Then you can always have a future. Plan ahead so you don't get caught off guard. Some people go greedy and start spending all their income in expansion, not thinking the situation might suddenly reverse, as it has done several times in the past.

Time for aggressive expansion is when pricing is low to lowest. Which I feel will be coming to a close here by Q4. Otherwise it's simply adding hash to stay ahead of diff and finding better efficiencies with what you have to drive revenue.

I do tend to agree to this, not because I did the exact thing, simply because of the numbers, since this is a bit of topic because this thread is not related to investment but solely focus on wiring and set-up - I decided to start a new thread to discuss your statement here > https://bitcointalk.org/index.php?topic=5161599.msg51705339#msg51705339

Would be great if you could join the discussion.

I agree with you, i think there is a chance for at least one major downtrend before the halving, then i guess another after halving and some calming afterwards (before the usual). People need to pay attention also to manufacturer delivery of the newer more efficient units, which impact the diff and lower the income of those still using older units, which can probably still be squeezed a bit more juice from until the halving...

Post halving i don't think there will be much interest for 16nm units anymore, now would be a good time to sell/replace those, while some people still want them to squeeze them before the halving.

Keep in mind that almost 99% of miners consider the fiat profit as oppose of anything else, based on that, your statement may very well be inaccurate,notice how that as for right now,even mining with an old gear like S7 which is built on 28nm is in fact still profitable for 5 cents per kwh.

coin price is the number 1 decision maker in everything mining related, if after the halving and assuming difficulty increases by double, it only make sense that most 16nm gears will be paper weight but what if BTC price is 50k by then ?

an S9 today makes about 5$ per day

after the halving (without taking price into calculation) S9 will make 2.5$

assuming diff will double s9 will make 1.25$ per day.

if price was to stay at 11,000$ per coin, that would be valid, but if say BTC is at 50,000$ after the halving then S9 will make 5.6$ which is even a better profit than before the halving.

indeed non of the above is guaranteed to happen, but non of it is far from possible, diff doubling is very doable, coin price at 50k is very doable too.

The great thing about mining is that diff takes a lot of time to double, while price really takes no time when it wants to double, hint in 6 months we went from 3k to 14k  = 328% increase to be accurate, while diff went from 5.6 to about 8 which is not even 100%.