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Author Topic: 4 mines for sale (from 1.5PH to 5.2 PH)  (Read 7689 times)
Rumipl
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August 31, 2015, 05:32:19 PM
#1

Due to high power prices in Europe and low BTC price we are shutting down 4 mines located in Poland and offering the hardware for sale at $0.20 per GH. The power efficiency of the mines is 0.84 J/GH (measured at 15kV level). The power efficiency can be improved by reducing voltage or replacing PSUs with more efficient ones (the current efficiency of PSUs is approximately 80%). The mines are build using 55nm chips on string boards. A miner consists of 48 boards with 15 chips on each board and is powered with 3 separate 500Watt PSUs. Voltage is reduced to 11.4V to improve power efficiency.

The 4 mines have following parameters:
Mine    TH    miners price
1    1500    1400    $300k
2    2200    2200    $440k
3    4300    5200    $860k
4    5200    5500    $1040k

Total hashrate of all 4 mines is above 13PH. When clocked to nominal 12V the mines achieve a total of 18PH at a power consumption of 1J/GH. The buyer must cover transportation costs. The offer can include the racks, wiring and transformers (15kV->0.4kV).

Direct contact: mine@bioinfo.pl

Few photos:

Single miner:
http://41.media.tumblr.com/2e2c4ddb4daaf87c913610a35336c212/tumblr_ntyj5o80s01ufrphao1_1280.jpg
http://41.media.tumblr.com/cc431e45e57258cd5eef879b9b6e3f2c/tumblr_ntyj5o80s01ufrphao2_1280.jpg
http://40.media.tumblr.com/386bd73425071d1bda0adf9bd88c37b9/tumblr_ntyj5o80s01ufrphao3_1280.jpg

Inside the mine:
http://36.media.tumblr.com/c9df787077ead6a1096825be92e0a29e/tumblr_ntyj8gfebz1ufrphao1_1280.jpg
http://40.media.tumblr.com/adb5951d2741ff8616a28c77bd5d6de6/tumblr_ntyj8gfebz1ufrphao2_1280.jpg
http://41.media.tumblr.com/926d901f33e96a662df92118c13a2342/tumblr_ntyj8gfebz1ufrphao3_1280.jpg
http://41.media.tumblr.com/4f0368adba1d2906944fc2b622ec3581/tumblr_ntyj8gfebz1ufrphao4_1280.jpg

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August 31, 2015, 05:38:22 PM
#2

This is one crazy farm. Never heard of these miners either. Looks like a custom setup.

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August 31, 2015, 05:44:22 PM
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This is one crazy farm. Never heard of these miners either. Looks like a custom setup.
Guessing they are using Gen1 Bitfury chips ?
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August 31, 2015, 05:49:30 PM
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Wow it isn't very often you see mines for sale but the custom miners are really intriguing, I wonder how many other miners are using custom miners and how much they save doing so.

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August 31, 2015, 05:53:19 PM
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I saw pictures of miners like that sometime in the last few weeks but I forget where. Looks to be akin to Yaizo/OneString design with a high-density backplane.

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August 31, 2015, 06:03:49 PM
#6

Wow that is a lot of miners to buy.  Would be interesting if someone comes in and ships to very low electric costing area.   

I keep thinking some day some A1 and similar gear will be pulled from network on big mines.  Maybe this is showing a possible future of this happening. 
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August 31, 2015, 06:10:08 PM
#7

I saw pictures of miners like that sometime in the last few weeks but I forget where. Looks to be akin to Yaizo/OneString design with a high-density backplane.

some more pictures of BitFury's old efforts pop up: http://www.cybtc.com/article-1891-1.html
perhaps?

RichBC
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August 31, 2015, 06:14:46 PM
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Due to high power prices in Europe and low BTC price we are shutting down 4 mines located in Poland and offering the hardware for sale at $0.20 per GH. The power efficiency of the mines is 0.84 J/GH (measured at 15kV level). The power efficiency can be improved by reducing voltage or replacing PSUs with more efficient ones (the current efficiency of PSUs is approximately 80%). The mines are build using 55nm chips on string boards. A miner consists of 48 boards with 15 chips on each board and is powered with 3 separate 500Watt PSUs. Voltage is reduced to 11.4V to improve power efficiency.

0.84 J/GH is looking very dated these days, particularly with the new Bitmain S7 offering 0.25 J/GH with scope to better that with a reduced voltage. What do you estimate is the best possible with your Miners with better PSU's & a reduced Voltage?

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August 31, 2015, 06:15:11 PM
#9

Yeah that's it. I remember thinking that corrugated cardboard makes terrible heatsinks.

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August 31, 2015, 06:48:31 PM
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Yeah that's it. I remember thinking that corrugated cardboard makes terrible heatsinks.

Lol please tell me thats a joke....Chips on their boards don't even have heatsinks...I don't know whats worse.

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August 31, 2015, 06:56:44 PM
#11

This is one crazy farm. Never heard of these miners either. Looks like a custom setup.
Guessing they are using Gen1 Bitfury chips ?

Yes, looks like I've already seen that board.... they were made in Russia.

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August 31, 2015, 07:06:38 PM
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Likely the cardboard was just for stability during shipping. Heatsink-less boards are not uncommon for sparse Bitfury gear like that, where the whole PCB might be pushing under 20 watts.

davecoin
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August 31, 2015, 08:14:06 PM
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Yeah that's it. I remember thinking that corrugated cardboard makes terrible heatsinks.

Lol please tell me thats a joke....Chips on their boards don't even have heatsinks...I don't know whats worse.

This was a pretty effective setup.  Not many BF Gen 1 users used heatsinks.  The setup consisted of an Rpi, a backplane, and the hashing boards, each with 16 chips that could be tuned dynamically.  These miners were available to the general public before the Antminer S1 was even announced. 

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September 01, 2015, 12:06:37 AM
#14

If anyone is looking for space to host these machines, our rates start at $60/kW, including tax, but go lower for bulk orders. james@greatnorthdata.com

Lowest-Cost Miner Hosting:  greatnorthdata.com
Rumipl
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September 01, 2015, 09:02:08 AM
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Lol please tell me thats a joke....Chips on their boards don't even have heatsinks...I don't know whats worse.

These are single layer aluminium PCB, which is heatsink itself. The cardboard on one of the images was to send the whole rack ( I cannot imagine using paper to build heatsinks ).

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September 01, 2015, 01:23:12 PM
#16

Somewhere I find a topic offering a big place with cheap electricity but location is in Venezuela, OP says he only pay $2 a month for electricity.
Why don't the OP look for this guy, maybe he could give mining a second chance.
el_rlee
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September 01, 2015, 05:45:03 PM
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Somewhere I find a topic offering a big place with cheap electricity but location is in Venezuela, OP says he only pay $2 a month for electricity.
Why don't the OP look for this guy, maybe he could give mining a second chance.

Probably that's why: http://www.zerohedge.com/news/2015-08-01/venezuela-increasingly-looks-war-zone
Rumipl
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September 02, 2015, 10:42:36 AM
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Stable geopolitical situation would be a great benefit. It is easier to send a single miner than sending the whole mine to  Venezuela Smiley

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September 02, 2015, 10:57:26 AM
#19

Even with cheap power 0.20 USD/Gh price is very expensive.

You cab buy S3+ which has a better efficiency with less than that.
MCHouston
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September 02, 2015, 03:17:25 PM
#20

Looks like one of Megabigpower's mines.


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