Post
Topic
Board Hardware
Re: High Efficiency FPGA & ASIC Bitcoin Mining Devices https://BTCFPGA.com
by
kano
on 19/10/2012, 23:17:18 UTC
Let's assume bASIC 57GH/s uses 180 W.
[...]

Uhh. If you want to do conservative figures— which you ought to if you're trying to convince other people since non-conservative figures will be ignored— you should be using about 3-4x that power consumption. I'd potentially be willing to entertain bets that no 54GH/s device is ever going to exist on 130nm at that level of power consumption, but regardless, it's certainly not a conservative number.
...
Just thought I'd quote that little gem of ... hmm not quite sure what to call it Smiley

...
At $0.12/kwh the btcfpga would need to cost draw no more than 139.87 watts (which isn't going to happen) or the price would have to be _negative_ to make it more attractive than a 60w/60GH device. At $0.04/kwh (about as low as it goes in the US), it could use as much as 311 watts before you should ask to be paid to run one.
...
Ooh another one Smiley

...
It was an analysis like this that convinced me to not produce a ASIC miner myself on 130nm over a year ago. It would have been a bit win IF I was one of only a few to do it. I estimated the odds of someone doing a miner on better process (which was a bit too costly and risky for me to undertake personally) as too great to justify because once they were available they'd be much more competitive than 130nm. I still have a hard time really believing that BFL's products are going to be real and meet their claims, but assuming that they are Inaba is right about his power arguments but at the moment it's all about shipping times.  Six months from now this market may be radically different.
And a 3rd one to add to that.

Well the delivery dates aren't all that far away 1-2 months ... so will be interesting to see if you got anything correct ...

Though I guess I have the risk of you deleting my post in the future as you have done before to other posts of mine ... twice ... under Luke-jr's orders ... or editing them which the evil space aliens told me you would do the last time I forgot to take my meds.