2. Develop FPGA bitstreams for the other applications that they have been listing on their site (computational research, medical imagery, etc: http://www.butterflylabs.com/drivers/ ) and resell them. Follow the links of the other applications you mention.  I know. That's my point. They have not yet developed them. |
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A few options: 1. Scrap them. This would only be a minor financial loss, as the revenues of the future SC product line will/should far surpass the revenues coming from the current gen products. 2. Develop FPGA bitstreams for the other applications that they have been listing on their site (computational research, medical imagery, etc: http://www.butterflylabs.com/drivers/ ) and resell them. 3. Mine on them until it is not profitable anymore. |
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This is an article that explains one of Bitcoin's advantages quite well (no fraud risk). Well done Bit-pay!
I also notice it is the first time that the name of Butterfly Labs CTO is disclosed in full: Nasser Gh Moeini. A little more transparency from BFL, like disclosing names of executives, would help increase trust...
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It doesn't show "new" buttons next to subject titles? Grrr. Useless, indeed.
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This can be linearly extrapolated from the hash rates and from the claim that Jalapeno is "USB powered" (ie. 2.5W).
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I just wonder how many chose the wire transfer option in hopes of a chargeback in the event that BFL misses their target shipping dates by a wide margin.
It is not possible to charge back a wire transfer. |
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It is my understanding that the SMF Bookmark Mod would serve the same purpose as subscribing to a thread, with the added advantage that end-users can stop bookmarking a thread ("unsubscribe"). Please install it. |
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Sub. (Forum admins: please install the SMF Bookmark Mod to avoid these noisy "sub" posts.) |
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Sorry if this has already been answered, but what is the power consumption of the Bitforce SC? Thanks!
Which one? Jalapeno is 2.5W, Single should be around 30W, Mini-Rig around 700W. |
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Have you considered running your own exchange? Perhaps this would be a natural evolution of your business, instead of relying on 3rd party exchanges.
Just like MtGox started as an exchange, and evolved to also offer a Bitcoin merchant transaction platform.
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if I sold everything with a market order, it would wipe out every exchange except Mt Gox, and it would push the Gox price below $6. That's not a good idea.
That means BFL collected at least 46k BTC of pre-orders, in 24 hours. Interesting, that's actually not as much as I expected... http://bitcoincharts.com/markets/mtgoxUSD_depth.html |
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It can be done by the box owner. The processor trays plug into the PCI-E connectors as do the fan walls & LCD power system. Only the power trip switch is hard wired.
It can be quite a lot of work though and in Gigga's case, it was really our responsibility... didn't want to put him through that.
In a worst case scenario, the trays can run without a case and just plug into PCIE connectors of a standard ATX PSU. Their top fans will keep them cool if sitting in open air.
There are no throttle issues with the Mini Rig cards. The processors exibit performance edge behavior by giving errors and not via throttling. Overall, they're much more heat tolerant.
PCI-E? Don't you mean USB? The mini rig card pictures you posted earlier clearly show no PCI-E connector. https://bitcointalk.org/index.php?topic=75764.msg906496#msg906496 |
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4 times the power and 20% less speed iirc, combined a factor of 5 in Mh/J (mrb: fixed unit)
Nope. Announced: 1Gh/s at 20W = 50 Mh/J Actual: 832Mh/s at 66W = 12.6 Mh/J Difference in efficiency per Joule is a factor of 4. (Again I am not counting the power adapter inefficiencies which bumps the 66W to 80W or so at the wall). |
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Since SHA-256 is so easy, why was BFL's FPGA power&performance estimates off by a factor of 5?
I know I am nitpicking, but they were off by "only" a factor of 4... A single draws 66W(*) from the 12V input --ignoring inefficiencies of the power adapter-- and 62W without counting the 2 (or sometimes 3) fans. (*) Average measured from my batch with a clamp meter. |
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Moxie, the guy behind cloudcracker.com, uses Amazon EC2 GPU instances, which are very expensive, which explains why his prices are so high. A competitor using FPGAs could significantly undercut him. Ignoring FPGAs, AMD GPUs are probably the best for this type of application, for the same reason that they are faster per $, compared to Nvidia, for ALU-bound workloads like pw cracking or Bitcoin mining. A very popular GPU pw cracking tool is oclhashcat, which has excellent support for AMD GPUs. bulanula doesn't know what he is talking about  |
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zvs: I am pretty sure I read your post saying 50... If I misremember, sorry.
The more I think about it, zvs was probably right... He never edited his bid. Sorry buddy! |
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This 50core card is designed to do double precision calculations, consumer GPUs only do single precision.
High-end AMD consumer GPUs (69xx, 77xx, 78xx, 79xx) do support double precision. Most Nvidia ones support it too (albeit artificially throttled). |
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sub
What is with all this "sub" spam? Is there some reason you guys can't just click to stupid "notify" link next to "reply"? Yes, because the "notify" link sends an e-mail when there is a new post. If you are watching 20 or so threads, that's 20 or so junk e-mails you get. Where as if you make a post in the topic, "sub", then you can just click on the nice "Show new replies to your posts." at the top of the forums and get a list of all the threads you follow with new activity. I concur with TheHarbinger. I wish forum admins would install the SMF Bookmark Mod, which provides the same user experience as "subscribing" to a thread. |
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kjj, run this to sample what bitcoind is doing: $ gdb -ex "set pagination 0" -ex "thread apply all bt" --batch -p $(pidof bitcoind)
Quite useful as a quick way to profile a running process... |
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