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Author Topic: My small mining farm  (Read 2299 times)
_oh_no_stop_this_ (OP)
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June 21, 2019, 10:17:44 AM
Last edit: June 30, 2019, 08:45:40 AM by _oh_no_stop_this_
Merited by frodocooper (5), suchmoon (4), dbshck (4), OgNasty (2), vapourminer (1), ETFbitcoin (1), o_e_l_e_o (1), Steamtyme (1), logfiles (1)
 #1

Hello fellow farmers,

I just built a small mining farm and would like to share the result with you.

Video:
https://youtu.be/-R32LagB8-A

Pics:
https://i.ibb.co/VMfpKv4/Final-Assembly-1.jpg
https://i.ibb.co/VqQm1bs/Final-Assembly-2.jpg
https://i.ibb.co/QKj8Sk7/Immersion-System-Assembled-15.jpg
https://i.ibb.co/grnTk35/Immersion-System-Assembled-8.jpg

There are over 150 ASICs: 115 Antminer S9 (including i/j series) and the rest is filled with Antminer D3 (sad story).

I am testing a home made immersion system to speed up Antminer S9 to its maximum speed. Summer weather makes it impossible at the moment, so it is just hashing at ~15.5TH/s, anything above that will require me to do one (or more) of these:
- Put better radiator
- Put better pump
- Add water cooling ( will need to drill the well  Undecided )

If you guys have some suggestions about anything, let me know, as I would like to improve the farm ( but at the minimum possible expense  Grin )

Upd: June-25-2019
Overclocked submerged miner to 25th/s at night while it was cooler outside. Used 3 power supplies, set voltage on all 3 chains to 9.4V and frequency to 1000.

Upd2 Huh: Does anyone have any idea about economics of cloud mining? If I was to make something available for cloud rent, why would I do that? The only reason for doing so seems to be the lack of funds to purchase equipment myself, or to spread the risk onto others. But there might be other insights I am not aware of?
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June 21, 2019, 12:10:17 PM
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Nice looking space you built there, hopefully keep the dust bunnies down. I'm going to have that music in my head all weekend lol. I love the looks of your immersion testing, I haven't heard of it being more practical to use for anyone, but have always found it neat.

The only critique I would have is you do still risk exhaust heat being sucked around to the miner intake. You should build a wall down the middle of the rack to create  the cold isle on the intake side, and the warm aisle on the miner exhaust side. I'm not sure about your seasonal temps but you might have some issues down the line on warm days with the exhaust air if he fans aren't powerful enough. Congrats though on the build out.

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June 21, 2019, 12:41:45 PM
 #3

Can you draw up some charts related to how much you spent and what kind of output you will get from this along with what would be your operational cost over the next few years?

I want to set up a mine of my own somewhere and I need more real world data about the breakeven duration and if it is feasible and if I can afford it.

Obviously, we all have to factor in the upcoming halving event.
_oh_no_stop_this_ (OP)
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June 21, 2019, 04:02:45 PM
Last edit: June 29, 2019, 07:52:06 PM by _oh_no_stop_this_
Merited by dbshck (4), frodocooper (4), vapourminer (1), Steamtyme (1)
 #4

Nice looking space you built there, hopefully keep the dust bunnies down. I'm going to have that music in my head all weekend lol. I love the looks of your immersion testing, I haven't heard of it being more practical to use for anyone, but have always found it neat.

The only critique I would have is you do still risk exhaust heat being sucked around to the miner intake. You should build a wall down the middle of the rack to create  the cold isle on the intake side, and the warm aisle on the miner exhaust side. I'm not sure about your seasonal temps but you might have some issues down the line on warm days with the exhaust air if he fans aren't powerful enough. Congrats though on the build out.

Dust bunnies are being a huge issue during the summer with all these dandelions and poplars around.
And the music... I heard that song a few weeks ago and it's still playing in the head  Cheesy

I made immersion system just to test how it works. It all cost me about $700 to build.
Now, knowing how to build such thing, I can cut the costs by 1/3 maybe.
The idea is to seal the barrel, blocking the dust, pollen, puff, and even mice sometimes Shocked from accessing the miner.
Next - I can increase speed, producing more hashrate per unit of equipment.
And since it will stay cool most of the time, maybe it makes sense to even purchase used miners. The one in the barrel right now was purchased for ~$140 together with power supply and it has a stable performance at 15.5th/s while being in 80 degrees C mineral oil.

And regarding the wall: The one you see near the miners is not a regular wall, those are the air filters. The whole wall is built with the used air filters (which can be exchanged when they get dirty). And another wall has exhaust fans.
However, you are right about the temperatures, so while I was making this video today, there were few more larger fans installed (the largest we could find working with 220V). Maybe next time we will just bring 360V wire and install some really powerful fans.
But during the winter, when the temps go down to -30C I have to shut down the fans and seal the holes; otherwise hashrate drops. The best ambient temperature is somewhere around 15-20 degrees.



Can you draw up some charts related to how much you spent and what kind of output you will get from this along with what would be your operational cost over the next few years?

I want to set up a mine of my own somewhere and I need more real world data about the breakeven duration and if it is feasible and if I can afford it.

Obviously, we all have to factor in the upcoming halving event.

Hello,

Sure, I made a table for you:

https://i.ibb.co/P5d2H2j/Capture.jpg

It seems like there is little sense in putting serious funds towards such venture, unless BTC price will raise dramatically following the halving event (which I hope will be the case), or unless you've got some sort of a "special" deal on electricity price  Grin

I have been mining for a few years now and experience has been positive so far. Meaning that I'm not at loss  Cool
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July 23, 2019, 05:00:46 PM
Last edit: July 23, 2019, 11:47:29 PM by frodocooper
 #5

Brave man; I hope the halving would bring good news as well.

I want to ask about the submerged mineral oil setup, please.

Do you use a pump and a radiator to cool it down? If yes could you direct me to one that works well with mineral oil?

also, I see in the pictures that you only submerged the ASIC what about the heat from the PSU, as that can build a bit in the covered barrel? Any worries about the mineral oil dissolving in time the rubber from any seals or cables?

I like it as well as it is minimum maintenance, but even more due to noise reduction.
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July 24, 2019, 02:52:53 PM
Merited by vapourminer (1), frodocooper (1)
 #6

Quote
Any worries about the mineral oil dissolving in time the rubber from any seals or cables?
Dissolving them, no. However generic mineral oil WILL quickly make them rock-hard and make nylon (the PCIe connectors) brittle. In both cases that will lead to them eventually cracking.

Using a silicon-based fluid such as those from Clearco Products is far far better.

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