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Sure it would work without the peltier chip in an open bath. You will lose fluid over time though if you don't condense it.
I am using a much bigger box for my final unit and hopefully I can fit 20-25 Neptune cards in the box with a very large radiator.
I will add them 5 at a time until I can't dissipate the heat anymore.
Here is the video - https://www.youtube.com/watch?v=gk3Vydo-L58
I am using a much bigger box for my final unit and hopefully I can fit 20-25 Neptune cards in the box with a very large radiator.
I will add them 5 at a time until I can't dissipate the heat anymore.
Here is the video - https://www.youtube.com/watch?v=gk3Vydo-L58
Welcome to the club of immersionists smracer
How many amps is that TEC you are using?
How many watts do you have at the wall (or 12V) in this setup?
Here are videos of the AM BE200 and SP SP10 in case you missed it:
http://www.vimeo.com/datatank/
I have 10 Miners and place them into 3 racks.
The terraminer have online about 1,4TH/s and not 2!
They also producing about 1850 Watt and not 1650 Watt!
I pay about 5000 / Month for the 3 Racks.
The terraminer have online about 1,4TH/s and not 2!
They also producing about 1850 Watt and not 1650 Watt!
I pay about 5000 / Month for the 3 Racks.
USD 1,038/kW??
Why only 3 per rack and not 10?
I guess he doesn't want to try to get 18.5KW heat out of the rack.
Not to mention it would consume almost 80 amps @ 230/240 volts.
Most racks do not have that kind of power feed.
32amp distribution strips is common.
Two strips per rack is common.
But still not enough, and it's not good to use above 80% of supply (for reliability).
Makes sense, but for 5000 Euros a month it may be worth buying an addition power strip or two and give it a try? That's almost the price of a 5 year old Audi A3, every single month!
I have 10 Miners and place them into 3 racks.
The terraminer have online about 1,4TH/s and not 2!
They also producing about 1850 Watt and not 1650 Watt!
I pay about 5000 / Month for the 3 Racks.
The terraminer have online about 1,4TH/s and not 2!
They also producing about 1850 Watt and not 1650 Watt!
I pay about 5000 / Month for the 3 Racks.
USD 1,038/kW??
Why only 3 per rack and not 10?
why he is doing in on 8btc.com which is a Chinese platform and it doesn't even have an English version
8BTC.com has been around for a VERY LONG time, with very serious Bitcoin supporters.
Quote
8BTC.com was like a sloop when first established in 2011. It was not before too long that 8BTC received the first donation from QQagent, the moderator of the Chinese sub-forum of Bitcointalk, as well as the Chinese translator of Satoshis Bitcoin White Paper.
From this 2013 article:
https://bitcoinmagazine.com/articles/the-pirates-of-8btc-implement-the-idea-of-distributed-autonomous-corporations-1383165373
Re: Some details of large scale mining in China based on failed IPO
Maybe they should push into rural part of china, where hydra power can be cheaper.
Not only this, but well connected people willing to share some of the income or hashrate with their "friends" are known to get much better deals.
In China even "no cost" deals are not unheard of (i.e. they run a few MW of hardware in the unused electricity portion of "private" power generators, often in remote areas).
If your electricity is free and your S7 has paid itself back a while ago, you don't mind keeping it running for a little longer, no matter there are 16nm or even 10nm chips around the corner. There are people running much older stuff than S7 in China.
If I am not wrong the failed IPO was run by Chinese people, but I am not sure if it bodes well on a public listed company to aim for these locations I mentioned or if it is easily accessible to foreigners in general.
In reality there are often a few layers of people between the paying party and the party providing the power. The better connected and longer in this "business", the less layers there are.
Re: Some details of large scale mining in China based on failed IPO
Maybe they should push into rural part of china, where hydra power can be cheaper.
Not only this, but well connected people willing to share some of the income or hashrate with their "friends" are known to get much better deals.
In China even "no cost" deals are not unheard of (i.e. they run a few MW of hardware in the unused electricity portion of "private" power generators, often in remote areas).
I'm willing to bet it was the earthquake .
Luckily our schedule was not affected by the recent Taiwan earthquake.
Mineral oil cooling is a single phase cooling method. The oil has to be pumped and in the case of dense hardware quite rigorously. 21 Inc used mineral oil already in 2014.
What makes the Novec/3M boiling approach so efficient is the phase change from fluid to vapor and then back to fluid. The fluid circulates passively (without spending energy on this circulation).
What makes the Novec/3M boiling approach so efficient is the phase change from fluid to vapor and then back to fluid. The fluid circulates passively (without spending energy on this circulation).
Re: THIS IS AN ISSUE: Bitcoin mining network uses a min. of 257 Megawatts per hour.
According to a Bitmain employee, China's bitcoin mining is about 70% hydro, 30% coal during the summer, and about 50% hydro, 50% coal during the winter. Most of the dams in China have seasonal flows and power generation capacity. This is dirtier than the average for bitcoin mining worldwide, which is probably above 80% renewable, with almost all of that hydro. My facility is about 95% hydro, for example.
I've seen mines in China which are 100% hydro (they are attached to hydropower plants, if there is too little water they shut down). Instead of World vs. China it makes sense looking at individual facilities in my opinion.
By no means a complete picture and mostly based on my own observations (I have seen quite a few mines in China):
Some of the largest mines in China now run on hydro. The rate of hydro-powered mines is steadily increasing too, because ease of access to them and because lower electricity rates can be negotiated with owners or operators. I have seen an increasing number of "micro mines" during the past 6-12 months (1 megawatt range, some even smaller) at very remote locations - the power plants there aren't that big, but on the other hand very little electricity is used locally since there is almost no industry. The power used for mining is basically the "left-over" from these turbines, would otherwise not be used as they are too remote. In general I noticed a larger fragmentation of hash-power in China. There are physically big facilities (big halls), but I have yet to see a 100MW or even 40MW facility. 20MW and smaller on the other hand I have seen.
Of course many miners run their gear in industrial places within city boundaries (also first tier cities) and pay published electricity rates - they don't actually have control where the electricity comes from. But I believe these will be more exceptional in the future, as naturally miners in China also need to compete with the cost of Bitcoin mining on a global scale (US, Canada, Georgia, Iceland, Sweden etc...). I believe many of these city miners may be driven out of business sooner or later, the block reward halving may play some role too but who knows.
For anyone interested, here is a nice little demo of how 3M uses the Cointerra boards/chips to demonstrate 2-phase immersion cooling.
Video from 3M booth at Supercomputing 2015 (SC15) in Austin:
https://www.youtube.com/watch?v=a_vJbGgxPTU
Cointerra chips have been overclocked to 750W this way (instead of 500W each), but not specifically in this demo as far as I can tell.
Interesting to see the Cointerra boards being used by supercomputing folks to see what would be possible if chips would be a tad bit larger than what they are used to and cooling would be different than what we use today (air, water, chillers, etc).
Video from 3M booth at Supercomputing 2015 (SC15) in Austin:
https://www.youtube.com/watch?v=a_vJbGgxPTU
Cointerra chips have been overclocked to 750W this way (instead of 500W each), but not specifically in this demo as far as I can tell.
Interesting to see the Cointerra boards being used by supercomputing folks to see what would be possible if chips would be a tad bit larger than what they are used to and cooling would be different than what we use today (air, water, chillers, etc).
You must mean February 2016. Let us never forget that China shuts down for the month of January for Chinese New Year. Let us never forget.
CNY holidays start on February 7 (Sunday) this year - probably a few days earlier due to travel for most.
Many megawatts I have personal knowledge of (air cooled) have been switched off recently. If this will be "compensated" by newer hardware coming online (hardware that was already in the pipeline) remains to be seen short term.
Re: 21e6, LLC - Secretive ASIC manufacturer that raised $5 million
21E6 operated since 2014 in a commercial wholesale DC, using modular turnkey infrastructure (not the new DataTank systems).
Percentage of network in low single digit during 2014 decreasing as difficulty went up (to my best knowledge based on MW numbers of a facility on the east coast).
Percentage of network in low single digit during 2014 decreasing as difficulty went up (to my best knowledge based on MW numbers of a facility on the east coast).
Did you mean this?
16 megawatt lease from CyrusOne in Phoenix by a bitcoin mining firm whose name has not been disclosed
No, that's not the one I meant (Phoenix AZ is not at the east coast either).
Re: 21e6, LLC - Secretive ASIC manufacturer that raised $5 million
21E6 operated since 2014 in a commercial wholesale DC, using modular turnkey infrastructure (not the new DataTank systems).
Percentage of network in low single digit during 2014 decreasing as difficulty went up (to my best knowledge based on MW numbers of a facility on the east coast).
Percentage of network in low single digit during 2014 decreasing as difficulty went up (to my best knowledge based on MW numbers of a facility on the east coast).
Re: ASICMiner BE300S Samples Arrived, <0.2W/G Achieved at Board Level
BitcoinBrothers out of Germany claimed in November this year to have an ASIC based on a 16nm 3D finFET and have plans to unleash 300-400 PH onto the network in Q1 2015. They also claim each of their 6 PH machines will consume 0.9 MW. So using your initial assumption, it appears they are poised take a little more than 50% of the network (assuming they add 300 PH) using only 45 MW.
I haven't dug very deeply into this claim but they seem to be echoing the claims of KNCminer as far as the 16nm 3D finFET based ASIC. I haven't seen power consumption estimates from KNC however.
I haven't dug very deeply into this claim but they seem to be echoing the claims of KNCminer as far as the 16nm 3D finFET based ASIC. I haven't seen power consumption estimates from KNC however.
Not sure where (electricity rate) they plan to drop their bomb, but the numbers you have posted put their power consumption at 0.15W/G.
Official claims we have (also from my internal report):
- Spondoolies Tech 0.05W/G mid 2015
- KnCMiner 16nm 0.07W/G early 2015
- Cointerra 16nm 5X (?) Q1 2015 (5X refers to their TerraMiner IV I guess)
- Bitfury sub-0.1J/G mid-year 2015
Not sure what to put on the Chinese ASIC manufacturers when it comes to official claims (Bitmain, Avalon, InnoSilicon, who else is significant or still in business?).
Re: ASICMiner BE300S Samples Arrived, <0.2W/G Achieved at Board Level
They have to find really cheap power, if you ask me! i want to see 0.01$/KWh! That way they could build a really big farm an mine the hell out of the blockchain. AM isn't a small player, they should go as far as possible and re-claim those 40% in 2015! Also they could continue to offer a cutting-edge cloud mining!
Even if the network wouldn't grow much from today on, claiming 40% of the network possibly means building 100-150MW worth of new Bitcoin mines in 2015. That's about half of all of Google's capacity (265MW) by power combined. And twice the size of Facebook (78MW). And it remains a moving target during and after.
I had a post here with some numbers I put together recently:
Energy Consumption of the Bitcoin Network
http://bitcointalk.org/index.php?topic=520977.msg9825138#msg9825138
Q: How much do you sell? Any specific requirements to qualify to buy?
A: Currently, 1PH has been allocated to Bit-X, no specific requirements.
A: Currently, 1PH has been allocated to Bit-X, no specific requirements.
I must be missing something obvious on the website as I can't find anything close to that amount.
The BTC/GHS55 market has 1.1TH total
The USD/GHS55 has $600 total
This presumes I'm looking at the correct site, as you've not provided a link !!!!!!!!!!!!
Might be for private deals?
Re: ASICMiner BE300S Samples Arrived, <0.2W/G Achieved at Board Level
... the MPW samples, and they aren't FCLGA....
No pictures of chip itself so we don't know. There's no reason that it couldn't be a FCLGA... It's not a big processor with over thousand pins so it dosn't need to look like one....I will concede it could be FCLGA though.
Sometimes things are different than they seem, especially in China.
I have seen these small LGA packages in sensors (from Analog Devices) for instance.