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Author Topic: Mining power of Bitcoin vs other networks  (Read 11960 times)
BurtW
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July 16, 2011, 03:23:34 AM
 #21

I gathered from elsewhere that the average number of hashes needed to get one block is given by the difficulty times 2^32.  If this is correct then:

The average number of hashes per block right now is 1,564,057 * 2^32 = 6,717,573,664,079,872 = 6,717,573,664 Megahashes/Block

Using your number of 2.3 Megahashes/Joule yields 6,717,573,664 / 2.3 = 2,920,684,201 Joules/Block

Finally 2,920,684,201 Joules/Block is 811 KWh/Block

Using your number of 0.15 $/KWh yields $121.65 per block or $2.43 per Bitcoin.

I have checked and rechecked these numbers and given the assumptions I believe they are correct.  

Of course the 2.3 Megahashes/Joule is only the energy used by the video card and does not take other power consumption and cooling costs into consideration. 

So the actual cost is more, this is just the lower bound.

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fabianhjr
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July 16, 2011, 04:24:01 AM
 #22

Yes, that is the most efficient one.(The 5970)

Though nVidia pulls about 0.7 mhashes/joule
AMD pulls 0.6 mhashes/joule
ARM 0.11 mhashes/joule
Intel 0.24 mhashes/joule
And this weird board: Altera EP4CE115C7 18.80 Mhashes/joule.($300 academic version) It is quite weird look at what it is.

https://en.bitcoin.it/wiki/Mining_hardware_comparison

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July 16, 2011, 04:16:57 PM
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The FPGA is interesting.  The ASIC numbers, including cost, would be even more interesting.

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July 16, 2011, 04:38:05 PM
 #24

Cray Unleashes 50-Petaflop XK6 Supercomputer

http://www.pcmag.com/article2/0,2817,2385857,00.asp

i want that one Cheesy my 17ghash are sooooo ugly in comparison lol






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July 16, 2011, 05:24:13 PM
 #25

Cray Unleashes 50-Petaflop XK6 Supercomputer
Since it runs on Nvidia you are most probably better off with your 17GHash/s farm.
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July 17, 2011, 10:19:39 AM
 #26

Cray Unleashes 50-Petaflop XK6 Supercomputer
Since it runs on Nvidia you are most probably better off with your 17GHash/s farm.


maybe ur right Cheesy thank u for getting me back up from under my bed ^^

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