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I received my 10 singles: 2 singles on June 12, and 8 on June 13.
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Why reply to my old incorrect post? I already showed you how I computed a revised estimate of ~1000 Mhash/J at 40nm... Our difference of opinion is that you think they do it at 90nm/130nm, whereas I maintain this should only be possible at 40nm or better. Knowing BFL, they will never disclose this detail. We will not know until someone decap the chip.
About cost vs price: same thing, we will never know their true cost. But the fact they price the hashing speed "only" ~10x better than FPGAs (mini rig = 1.65 Mhash/s/$) is one of the reasons why I said ASICs won't be an exponential leap. (I was talking about price, you about cost.) ASICs manufacturers will initially price their product to be "better" than FPGAs, but not "exponentially better".
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P4man: my latest estimations ( "probably ~1000 Mhash/J at 40nm") are in line with BFL's press release claiming "3.5Ghash/s from a USB-power device (ie. 2.5W)" which would translate to 1400 Mhash/J... (What surprises me though is that it would mean they are going for 40nm instead of an older node like 90nm or 130nm.) However, your price estimations were incorrect by a factor of 30x-40x: you said an ASIC would be "less than $1 per GH", but their press release announced $30-40 per Ghash/s. |
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- BFL said a mini rig card mines at 1.5Gh/s, therefore it will have 17 cards for 25Gh/s total (even though mini rig prototype pictures show it may have more cards, they don't show all angles). - Each card should weight at most 1kg (heatsinks...) -- this is an overestimation, for reference an HD 6990 weights 1.16kg. - The 1400W ATX PSU will weight about 2-3kg. - The case and fans will weight about 10-15kg. Therefore I estimate a mini rig will weight 30kg +/- 5kg, still kind of transportable by an adult in average shape  BFL said the mini rig weights a little under 23kg (50lb). I was close  https://bitcointalk.org/index.php?topic=75764.msg966604#msg966604 |
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That aside, speculating that this is real: With the reward drop, it only makes sense that the average miner's hash rate will have to more than double to see the same rewards
Nope. If miners, on average, double their hashrate, the difficulty will double, so they would still see half the rewards. |
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BFL finally does the right thing by making their estimates more accurate, and you guys still complain? WTF!
For the record, the latest data shows ~11 weeks delivery time. So, yes, 10 weeks is fair! As far as we know, they are doing the best they can to scale their business up.
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Besides, a ztex 1.15x board costs less than 100 BTC. Why would you try it on a 1.15y (quad)?
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Bitter little troll yet again eh? Well it is certainly not FUD that you are not paying your bonds out of a 200gh/s farm which you don't have and I notice did not reply to that question when I asked it, again just another chime in to spread your personal attack on me once more.
If you create an asset and sell X Ymh/s bonds, and don't actually have any mining hardware but still pay out what you should, who cares? That's called a Ponzi scheme. See how well it turned out for Madoff and Stanford not paying your bonds out of a 200gh/s farm which you don't have Double negative, so you're arguing against yourself  * mrb chuckles |
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I will trade 1 Cairnsmore1 for:
- either 2 Icarus
- or 1 BFL Single (and you pay an extra 30 BTC)
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Does that price include shipping?
Yes. when does this end?
Auction ends Saturday, June 16, some time in the early afternoon - pacific time. (I updated the post.) |
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I like your persistence David :-) But 55 BTC is too low of an offer.
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Edit: Auction moved to https://bitcointalk.org/index.php?topic=88128.0I am auctioning a set of 3 x HD 5970 which are half defective and out of warranty!One mines fine for a few hours, then hangs. One fails to initialize during POST (it is not seen by lspci), other times a reboot fixes it. One causes kernel hangs as soon as Xorg starts. Auction starts at 5 BTC for the lot. I pay for shipping, and will ship anywhere in the US. Auction ends Sunday, June 17, some time in the evening - pacific time.
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Bump.
I sold about a half of my remaining cards in the last 2 weeks.
Anyone interested, make an offer.
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EldenTyrell thought that Ztex's bitstream only achieved 213 Mh/s, so he decided to target only slightly higher as a proof-of-concept.
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we use the same Spartan6LX150 FPGA chip that all the other manufacturers are , also our unit is the cheapest quad unit currently available
Ztex offers large discounts when buying their 1.15y boards in quantity, beating your unit price: 719 EUR (~$900) in qty 25-49. Does it mean you would match their prices? |
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It is my opinion that FPGA will be #1 and ASIC is not and I am willing to bet on it.
However you are right its impossible to quantify in those terms
can anyone think of a way we can quantify the bet?
With eldentyrell's TML Spartan6 bitstream requesting mining jobs from centralized servers, he should be able to tell exactly how many Ghash/s of Spartan6 there are |
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Care to share your math? I suspect you forgot a bitcoin hash consists of two SHA256 hashes. I took this into account: 1.51 Gbps / 8 (bits/bytes) / 64 (bytes/block) / 2 (SHA-256 blocks per Bitcoin hash) / 0.0037 (Watt) = 398.5 Mhash/JouleEdit: actually this is wrong. 1.51Gbps was achieved at maximal clock (200 MHz), for which power consumption was not reported. the 0.0037 Watt was estimated with a clock running at 50 Mhz, not 200 Mhz. The actual performance number that can be used is the quoted 19.75 mJ/Gbits which correspond to 49.4 Mhash/J (see my edited post above). |
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No idea where the 75% come from. According to my measurements on a 1.15x board (w/o fan, current at 3.3V counted as inefficiency) the efficiency is about 87%. (6.7A @ 1.23V vs. 9.4W at 12V).
The 75% comes from an estimation of reading the efficiency graphs on page 6 of Alpha and Omega AOZ1025D. Anyway I updated the post. Thanks for measuring efficiency! |
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