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Is this true?  -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 You are receiving this message because your email address is associated with an account on bitcointalk.org. I regret to have to inform you that some information about your account was obtained by an attacker who successfully compromised the bitcointalk.org server. The following information about your account was likely leaked: - Email address - Password hash - Last-used IP address and registration IP address - Secret question and a basic (not brute-force-resistant) hash of your secret answer - Various settings You should immediately change your forum password and delete or change your secret question. To do this, log into the forum, click "profile", and then go to "account related settings". If you used the same password on bitcointalk.org as on other sites, then you should also immediately change your password on those other sites. Also, if you had a secret question set, then you should assume that the attacker now knows the answer to your secret question. Your password was salted and hashed using sha256crypt with 7500 rounds. This will slow down anyone trying to recover your password, but it will not completely prevent it unless your password was extremely strong. While nothing can ever be ruled out in these sorts of situations, I do not believe that the attacker was able to collect any forum personal messages. I apologize for the inconvenience and for any trouble that this may cause. -----BEGIN PGP SIGNATURE----- iF4EAREIAAYFAlVhiGIACgkQxlVWk9q1keeUmgEAhGi8pTghxISo1feeXkUMhW3a uKxLeOOkTQR5Zh7aGKoBAMEvYsGEBGt3hzInIh+k43XJjGYywSiPAal1KI7Arfs0 =bvuI -----END PGP SIGNATURE----- |
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Hi, any sort of "refrigerator" or "air-conditioning" system will not be enough to cool your average Bitcoin miner. The most important thing is bring in fresh, outside air into the unit and taking the hot air away as far as possible, so high RPM large fans are the best way to go. The most important thing is the amount of cubic feet of air per minute the fan can move.
Source; Running a mine in Australia, Summer :/
Ossy guys I hear a lot about evaporative free cooling over there in Australia. That kind technology is easy to implement and cost a lot to build and operate. Would that be solution for bitcoin mining. Their will be 1 pump and I think we can use the miner fan to pull in the air and a exhaust fan to take out the heat. What do you think of the idea? i think you dont know whether to use refrigeration systems, immersion cooling, or evaporative cooling, yet claim to have thorough knowledge of each. The point is that cooling can be different for every location, but refrigeration tech is 100% the least cost-efficient If you are an expert, please send me your CV and we can talk about a job offer for you over here to Thailand to help me a perfect cooling bitcoin mining. FYI. This cabinet doesn't use refrigeration, it use precision cooling data center with airflow optimization front to back. |
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Hi, any sort of "refrigerator" or "air-conditioning" system will not be enough to cool your average Bitcoin miner. The most important thing is bring in fresh, outside air into the unit and taking the hot air away as far as possible, so high RPM large fans are the best way to go. The most important thing is the amount of cubic feet of air per minute the fan can move.
Source; Running a mine in Australia, Summer :/
Ossy guys I hear a lot about evaporative free cooling over there in Australia. That kind technology is easy to implement and cost a lot to build and operate. Would that be solution for bitcoin mining. Their will be 1 pump and I think we can use the miner fan to pull in the air and a exhaust fan to take out the heat. What do you think of the idea? |
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positive roi? nothing!!!
Don't think so. How would big data center make their profit in this crytocurrency mining business then? All their is to return on investment within the lifespan of the mining rig that paid for both hardware and electricity bill at the current value of bitcoin. Let me do the math later in the day. |
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not worth! we have negative roi on everything and you come up with more costs in the electric bill!
Is their anything that make roi? |
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 yap, their is a lot more to learn and waiting for your advice 
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This project is proven to been feel interesting. Yes, right now my cabinet is 3.5kw capacity. The question is how capacity should I upgrade my design. Talking from point that I have pictures shown as working production for another application already. So I like to find a spot in bitcoin mining. But the one I have does not fit the capacity requirements yet.
Thank you for your advice mate
I am racking my brain to understand what situation someone would ever use a 20kW contained-cooling rack. Usually these are used with 1-2kW of gear as a sound-dampening enclosure, not meant to actually cool a large amount of power. OPTION 1: You put 20kW of equipment in an open rack or on shelving. It costs <$400. 20kW of heat is blown out the back of the cabinet. OPTION 2: You put 20kW of equipment into a sealed enclosure with a 1.3 PUE AC built in. It costs >$5000 and weighs >300lbs when empty. 26kW of heat is blown out the back of the cabinet. oh, and option 2 is a little quieter, you only have the noise of a 20kW-capable air conditioner. Seriously - this is a product with no market. Liquid Immersion cooling tanks are the obvious alternative, and are quieter, FAR more power efficient, and can move the heat outside of a building by pumping the hot liquid to a radiator located on the roof. It might allow a data center without the airflow to host a few miners. But cost I don't see this as feasible. The true data centers for bitcoin have massive airflow. And they would never need this. I would have to agree to expensive to hobby miners, and no market for these in a true bitcoin data center. The product sale good with more then 10,000 units to market like bank branch, small office, cellular site and etc in Thailand alone. Heat pass through a duct out of the room. Immersion cooling is what I'm looking at next. I'm developing a 200kw per horizontal rack with micro chiller. Trying to make one withIn $20K budget right now. LOL you just pulled that shit from Alliedcontrol didnt you? Such a joke. Actually no, I did such project as OEM for supercomputer heat pipe cooling direct to CPU before. Personally i like what allied control did with their modular design. |
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This project is proven to been feel interesting. Yes, right now my cabinet is 3.5kw capacity. The question is how capacity should I upgrade my design. Talking from point that I have pictures shown as working production for another application already. So I like to find a spot in bitcoin mining. But the one I have does not fit the capacity requirements yet.
Thank you for your advice mate
Hey are you a failed engineer or something? You CANT upgrade the cabinet cooling capacity due to the damn design is based on phased change. There will be no compressor setup in the world that can handle 10kW that can fit in that cabinet. You want high density, look for other alternatives. You are correct the compressor. With the upgrade design this unit will be by external chiller sending cooled water. |
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This project is proven to been feel interesting. Yes, right now my cabinet is 3.5kw capacity. The question is how capacity should I upgrade my design. Talking from point that I have pictures shown as working production for another application already. So I like to find a spot in bitcoin mining. But the one I have does not fit the capacity requirements yet.
Thank you for your advice mate
I am racking my brain to understand what situation someone would ever use a 20kW contained-cooling rack. Usually these are used with 1-2kW of gear as a sound-dampening enclosure, not meant to actually cool a large amount of power. OPTION 1: You put 20kW of equipment in an open rack or on shelving. It costs <$400. 20kW of heat is blown out the back of the cabinet. OPTION 2: You put 20kW of equipment into a sealed enclosure with a 1.3 PUE AC built in. It costs >$5000 and weighs >300lbs when empty. 26kW of heat is blown out the back of the cabinet. oh, and option 2 is a little quieter, you only have the noise of a 20kW-capable air conditioner. Seriously - this is a product with no market. Liquid Immersion cooling tanks are the obvious alternative, and are quieter, FAR more power efficient, and can move the heat outside of a building by pumping the hot liquid to a radiator located on the roof. It might allow a data center without the airflow to host a few miners. But cost I don't see this as feasible. The true data centers for bitcoin have massive airflow. And they would never need this. I would have to agree to expensive to hobby miners, and no market for these in a true bitcoin data center. The product sale good with more then 10,000 units to market like bank branch, small office, cellular site and etc in Thailand alone. Heat pass through a duct out of the room. Immersion cooling is what I'm looking at next. I'm developing a 200kw per horizontal rack with micro chiller. Trying to make one withIn $20K budget right now. |
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This project is proven to been feel interesting. Yes, right now my cabinet is 3.5kw capacity. The question is how capacity should I upgrade my design. Talking from point that I have pictures shown as working production for another application already. So I like to find a spot in bitcoin mining. But the one I have does not fit the capacity requirements yet.
Thank you for your advice mate
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also think antminer s4 cost $1,250 without shipping and taxes, so that is around $9,000 for 6 units
then if 30kw per rack support 20 antminer s4, where you can put in max (42/3) = units
for Spondoolies SP35 would need 3.5kw per unit of 2U. then one rack can fit 21 x SP35 = 73.5kw which miner would cost $83,580
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What's the cost per KW for one of these things?
Price quote in unit of rack? And its not ratio. This unit right now is $8,000 FOB Thailand. Right now I'm trying to drive the cost down and up the cooling capacity. So thats the thing, even if you get it up to 10KW per rack that's only 12TH of miners. Which is about $5000 of miners. The costs don't add up. What do you think is reasonable? 30KW per rack can put in 14 x Antminer S4 (2TH) = 28TH per rack |
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What's the cost per KW for one of these things?
Price quote in unit of rack? And its not ratio. This unit right now is $8,000 FOB Thailand. Right now I'm trying to drive the cost down and up the cooling capacity. |
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Hosted colocation in Thailand cost $3,000/month with max 7kw. Extra power cost $0.3/kwh
So I don't think you afford to be in such system, where commercial power would cost $0.08/kwh from the grid.
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As for 24/7 yap is certified to do so. Also guys like Hitachi said build them OEM brand cabinet.
For you cold place are luck. I'm in Thailand where the season is only consider is hot and hotter and hottest.
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I'm a miner myself with own engineering company manufacture that build micro data center. I'm planning to move my miners from in this cooling that my team build to save money hosting these miner else. It can take 4KW easily per rack with PUE of 1.4. its not enough for hard core mining, which i'm planning to up the spec to handle 20KW per rack with PUE 1.3 I like you comments what else i should improve. Thank mates       |
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