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SMB-2525 (OP)
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September 30, 2014, 11:42:27 AM |
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If anybody has a history of power consumption (W/GHS) for miners going back a couple of years, would you please share it with or send it to me? I'm trying to figure out when 2013 early 2014 miners go negative on power alone as BTC price decreases. See this post for more context. Thanks https://bitcointalk.org/index.php?topic=802800.msg9027803#msg9027803 |
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JohnnyBTC
Newbie
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Activity: 57
Merit: 0
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October 02, 2014, 04:30:41 PM |
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i want to see this too. I think it has really leveled off lately..
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cyberpinoy
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October 03, 2014, 07:41:25 PM |
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Simple equation 5 watts per chip  They go negative not so much because of the power usage but the difficulty becoming to hard for the miner. |
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xstr8guy
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October 04, 2014, 10:21:47 PM |
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1w/GHs is barely profitable today with my electric rates which are about average for US residential service. I have maybe one month before I have to shut off 2/3 of my equipment.
Some "facts"* I just pulled out of my ass...
- BFL Singles are ~4-5w/GHs
- First Gen ASICMiner chips (Blades, USB Block Erupters) are ~10w/GHs
- Bitmain S1 are ~2w/GHs
- KNC Jupiters, Bitmain S2, 1st Gen Bitfury, BitMine.ch are all ~1w/GH.
- The others (Cointerra, Hashfast, um... some others, I think) were somewhat worse than 1w/GHs.
- The most recent gen miners (BFL Monarch, SPTech SP3x, Bitmain S3 & S4, ASICMiner Prisma are all ~.7w/GHs.
* I'm sure the stats are not 100% accurate... just going off the top-o-my-head.
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warrensgun
Full Member
Offline
Activity: 195
Merit: 100
Mining since bitcoin was $1
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October 06, 2014, 12:24:21 AM |
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it might all depend on what you pay per kw. Most people I've talked to it's .10 per kwh. In some places where a local municipality has ownership of the utility it can be closer to .06 per kwh. In the winter in the north you have a heat offset to reduce the cost of running a furnace vs the heat kicked off. In the south you see the opposite, increased AC usage due to heat production.
Avalon 60gh miner from nov 2013 is 10w/gh - it had an 850w psu inside - I ripped it apart and pulled it offline a while ago.
BFL singles are almost worth more for their CPU coolers than anything else.
S1's while being 2w/ghash can be undervolted to closer to 1w/ghash
Jupiter, Bitfury H-M boards and asicminer tubes are all close to 1w/ghash without getting out a calculator.
Accordingly if current prices/diff stays the same (lol) - then $300 BTC and current diff is about .014 BTC/TH/DAY or $4.20 if power is .10 KWH, then that's $2.40 per day in power.
So really it's going to be a benefit to those who have dirt cheap power, and to those who are going to view break even as a point of converting a utility bill into BTC.
Suffice to say I'm not sure who is still buying BFL singles on ebay - or why they are - but they still seem to be selling.
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SMB-2525 (OP)
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October 06, 2014, 11:13:43 AM |
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THANKS! Wow!. So it looks like everything before this summer is more than 1 J/GH. Assuming all in operating cost of 0.10/KWH, that means they are already negative on power or (1J/GH) go negative in December (assumes 10% difficulty bumps). Think about it. The capital investment made in Apr-Jun quarter by the big miners is obsolete in 9 months. This is not a viable business model at $300 BTC. IMHO, BTC prices are dropping because some large miners must sell to keep the lights on. That is a vicious circle. People who believe in BTC are going to hold while the miners dig themselves into a deeper hole. I'm increasingly convinced new capital will stop flowing into new hashing capacity and difficulty increases will slow, perhaps by a lot. |
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philipma1957
Legendary
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Activity: 4116
Merit: 7873
'The right to privacy matters'
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October 08, 2014, 02:55:39 PM |
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THANKS! Wow!. So it looks like everything before this summer is more than 1 J/GH. Assuming all in operating cost of 0.10/KWH, that means they are already negative on power or (1J/GH) go negative in December (assumes 10% difficulty bumps). Think about it. The capital investment made in Apr-Jun quarter by the big miners is obsolete in 9 months. This is not a viable business model at $300 BTC. IMHO, BTC prices are dropping because some large miners must sell to keep the lights on. That is a vicious circle. People who believe in BTC are going to hold while the miners dig themselves into a deeper hole. I'm increasingly convinced new capital will stop flowing into new hashing capacity and difficulty increases will slow, perhaps by a lot. you do realize a builder such as asicminer can build a long tube doing 1.4 or 1.5 th for under 200 usd ? in China he can get low cost power at 6 cents or less. you do realize bitmaintech stopped selling the lower priced s-3's because they can build a farm at 225 usd a th. hashnest is its name. |
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Sitarow
Legendary
Offline
Activity: 1792
Merit: 1047
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October 08, 2014, 08:30:53 PM |
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THANKS! Wow!. So it looks like everything before this summer is more than 1 J/GH. Assuming all in operating cost of 0.10/KWH, that means they are already negative on power or (1J/GH) go negative in December (assumes 10% difficulty bumps). Think about it. The capital investment made in Apr-Jun quarter by the big miners is obsolete in 9 months. This is not a viable business model at $300 BTC. IMHO, BTC prices are dropping because some large miners must sell to keep the lights on. That is a vicious circle. People who believe in BTC are going to hold while the miners dig themselves into a deeper hole. I'm increasingly convinced new capital will stop flowing into new hashing capacity and difficulty increases will slow, perhaps by a lot. you do realize a builder such as asicminer can build a long tube doing 1.4 or 1.5 th for under 200 usd ? in China he can get low cost power at 6 cents or less. you do realize bitmaintech stopped selling the lower priced s-3's because they can build a farm at 225 usd a th. hashnest is its name. The reality is that many will have hardware on the shelf. Especially if they are already capped at their present location. Building infrastructure to operate miners is not cheep. It would be better to have that off the network then having it effect your present operation. So if you take that into consideration. Buying BTC at Sub $300 is far better then any hardware investment. |
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