Inaba, you cannot get paid for that, because... Both of these bounties become null and void if BFL releases the figures themselves.
It was very craftily formulated to not let you earn a single satoshi.  |
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If you want to see how efficiently the transistors are utilized, you have to multiply by lambda (in meters) rather than divide by it.
In effect the units will be actually H/ms, but the calculated values will be a dozen orders of magnitude smaller.
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Nice concept, but you've messed the SI units a bit. Do edit the text. First you are multiplying by area, than in example you divide by it. (I assume the latter is correct.) Take the hashrate (in H/s), multiply by the die area (in square
meters), and divide by the square of the process's lambda (in meters).
The resulting quantity is measured in hashes per meter-second.
For the above you would get Hm/s. Example
The Bitfury hasher gets 300MH/s: 300*106H/s
It runs on a Spartan-6, which is a 45nm device with lambda=22.5nm on a 300mm2 die.
Dividing the hashrate by the area gives: 1*106H/(s*mm2)
Converting from mm2 to m2 gives 1H/(s*m2)
Dividing this by lambda (22.5*10-9 meters) gives 0.0444*109H/(s*m)
which is 44.44*106 H/(s*m) or roughly 44MH/s*m.
Summary
To compute the metric, take the overall throughput of the device
(hashes/sec), divide by the chip area measured in square meters and
divide again by the lambda factor for the process used.
For the above you get H/m3s rather than H/ms. |
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Nefario by e-mailHe reads e-mails. And answers sometimes. It seems he doesn't read this forum, so writing here is of no help.
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So now it's time for another important question.
Where did you get the name "Inaba"?
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There's a pic of the back of the board on the BFL forums.
It's not always easy to find something there, so the link is: the back of the board |
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If things has changed from 4th September, let Tom correct me.
However everything is changed now (...)
Thanks. So, any shipping date is possible, for the price however. BTW, no one asked if the factory will mine on the units? |
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You said you don't know what the power draw will be? By "more efficient" than a MMQ, is that total power, or MHs/W? If the latter, this could use > 1.2KW and still me considered "more efficient".
this will be public info in a few days This thread is very long, so I could miss the info, but judging by the latest posts, Tom changed his mind and didn't publish the power estimates, did he? |
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I were still deciding which of the two ASIC units I should get myself. BFL or Tom's hardware.
Consider that if you order a bASIC today, your order will likely ship out with the first batch, whereas if you instead order the mentioned competing product, your order will likely have to wait in the queue a good while after shipping begins before being shipped out. With the first batch of ASIC chips produced for Tom (a 1000 of them), not with the first batch of bASICs shipped. Why? Let's see: bASIC units will be assembled at the same plant that the ModMiner Quad's are, they will be produced in batches of 30-50 every 5-10 days and shipped out on first come first served basis
i recall Tom telling me that roughly half of the order # represents real orders; so ~750. Having 750 orders now, shipping in batches of 50 every 5 days (the optimistic assumption) - your order will likely ship 75 days after bASIC starts shipping. Having 750 orders now, shipping in batches of 30 every 10 days (the pessimistic assumption) - your order will likely ship 250 days after bASIC starts shipping. So, the answer for Bitcoin_Bing is: today placed order will likely ship 75-250 days after bASIC starts shipping. If things has changed from 4th September, let Tom correct me. |
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Let's see some illustrative calculations:
Let's assume bASIC 57GH/s uses 120 W.
The cost of electricity (say 0.11 $/kWh) is about $58 per year higher than that of BFL SC Single.
If one buy this instead of BFL SC Single, the price difference ($230) pays for the more power for 4 years.
Let's assume bASIC 57GH/s uses 180 W.
The cost of electricity (say 0.11 $/kWh) is about $115 per year higher than that of BFL SC Single.
If one buy this instead of BFL SC Single, the price difference ($230) pays for the more power for 2 years
Let's assume the difficulty is 10 times greater than now (10 x 3054627), one block gives 25 BTC, and 1 BTC is $12.61.
In unlikely case of being them constant for a year, the Single net annual profit is 4488 $/year and bASIC net annual profit is 4261 $/year.
The difference is... $227. Interesting coincidence. (I didn't set the BTC price, it was left in my BTC calculator from two weeks ago.)
For 100 times greater difficulty the yearly net profits difference is $396 - $374 = $22.
I believe the differences are way below an error coming from uncertainty (of tech specs, of difficulty changes, of price changes, etc.).
The date when the mining starts is surely the most important factor.
EDIT: The 57 GH/s number should be 54 GH/s. The differences of annual profit are actually two times greater: $454 and $44.
The annual profit I'd calculated as if both devices use the same power (60 W for both), so I shouldn't call it "net".
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I've returned the excess.
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Roma locuta causa finita.
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I think the smoke could be a clue why the mistake occurred. |
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It looks like the rest of the payments has started.
The chain begins from tx 286b4172160ba21c8129e08dd43a9567ea55973be6038a54f8f35c92d6d34d20 of 975.8160973 BTC.
However instead of be paid the missing 10%, I was paid once again the 90% of my coins (31.05 BTC):
The first payout (proper): c1c3372e1bedd22afd5c55c381840ea2ef697fc44528a50da10291e04907d75b
The second (duplicated): 5264a57d8eaf761d81f7fe4507fbc3e21d53ebeb1f0095424e8794a6e1b85711
Maybe there is some charity giving the coins away to people, but I bet it's simple human error in Nefario's scripts.
Let's hope the error is single.
I'll return the excess to Nefario, to let him to be able to refund others completely.
I have to ask him by PM for proper address for the return. It may take a while before he answers.
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