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I bought a few packages of honey caramels a couple of weeks ago.
Surely it is not cheap to send them across the ocean (Italy), but well worth it!
They're delicious and Bees Bros. have a really caring customer support.
Recommended!
spiccioli
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It probably won't be cheap and you get into an equation that it's probably cheaper just have more boards and keep it simple. This sort of stuff can make a horrible mess if it leaks or spills.
It should not it is a dielectric fluid which evaporates very quickly. spiccioli. The Novac and similar low boiling point dialectrics used for phase change cooling are very expensive. Something like $700 / gal IIRC. Ok, back to fans for the foreseeable future  spiccioli |
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It probably won't be cheap and you get into an equation that it's probably cheaper just have more boards and keep it simple. This sort of stuff can make a horrible mess if it leaks or spills.
It should not it is a dielectric fluid which evaporates very quickly. spiccioli. |
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It is 181.403mm x 126.492mm plus or minus a little tolerance.
Note the dual sets of heatsink holes on the latest CAD image. We have a fairly good northbridge type heatsink ordered for the front that will user the bigger pair. Optionally you can have a smaller standard one on the back if you like. We are hoping to offer some addition options for heatsinks e.g. like copper options and maybe a water coolers. We will also be looking at some other techniques as well that might work well but that's for us to experiment with here first.
Yohan
yohan, I think that submerging them in fluid like this http://solutions.3m.com/wps/portal/3M/en_US/ElectronicsChemicals/Home/Products/ElectronicLiquids/?WT.mc_id=Electronics_Redirect&WT.tsrc=Redirectcould make a good solution. Don't know how much it costs though. spiccioli. |
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yohan,
awsome!
I really like the presence of temperature sensors and the use of a pci-e connector to power the board which makes using a normal rig PSU a snap!
spiccioli.
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If you want to be accurate the EU law I believe that it applies only to consumer purchases. I'm not a lawyer but in my humble opinion as most miners aim to earn money by these purchases they would not count as consumers and hence they won't be covered by that law. That's probably a gray area so you can all argue about that.
There is a second part of this law as far as i understand it is that after 6 months it is up to the consumer to prove that they didn't abuse a product. In most things this isn't likely to be an issue but Bitcoining where everyone is trying to overclock that's going to be a hard one.
We are looking at our design in terms of the warranty and we have some features that might allow us to do 1yr and maybe 2 yr warranties at minimal risk. At the moment the decision simply isn't made so I won't say any more on this until we do.
yohan, as far as I know, EU law dictates a two year warranty for end users and one year for companies. I don't know if Great Britain is subject to this law, though. spiccioli |
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So, how are the public pools doing? Are miners taking advantage of these public pools?
check_status, nobody here :/ spiccioli. |
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The design side is easy for our very able team. To give you an idea the design, and first proto was built, of Merrick1 in 8 weeks. That's 100X the complexity of what we are doing on this first Bitcoin product. I could give a very long list of similar examples of other projects. This is a professional design and manufacture team that's at the top of profession teams.
We will look at FPGA optimisations and software aspects but I won't promise any timelines. That's part of the reason for the current price. You will have to do a bit of work yourself so this may not be for everyone in this raw form. The timelines on this will depend on what else the design team end up doing. The team is rarely underloaded so this sort thing can take time.
yohan, some rough edges are not a problem as long as the board has its FPGA bitstream and there is a description of the protocol used to communicate with onboard FPGAs so that mining programs can be upgraded to use your boards. if, on the other hand, you're selling a "naked" board, without any software nor FPGA bitstream, then this should be clearly stated since very few here will be able to use them even adding a lot of work  spiccioli. |
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The electricity alone costs about $15K per day at average US power rates. They would do something else.
MoonShadow, 15K a day, for the USA, is a rounding error or even less. spiccioli Again, that's after they bought the hardware and built the most powerful supercomputer the world has ever seen, and did so while outpacing not just the current network growth, but also the reserve hashing power of the network. Something like this wouldn't go unnoticed or unchallenged by factions within the government itself, due to the cost of construction alone. Moon, the USA have a 15 trillions (and growing) national debt last time I checked, do you think they would mind spendig a few billions to destroy bitcoin if or when bitcoin becomes a problem? http://www.zerohedge.com/news/gross-us-debt-surges-240-billion-overnight-us-debt-gdp-hits-post-world-war-ii-high-972-officialFor example, 240 billions overnight! spiccioli |
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The electricity alone costs about $15K per day at average US power rates. They would do something else.
MoonShadow, 15K a day, for the USA, is a rounding error or even less. spiccioli |
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For the industrial motherboards with no fan directly above the board it would be possible to use every slot. That does need very good case fans then. Our solution in development will also allow every slot to be used.
Sweet. In my application, I need power density. Have you considered a design that will allow you to cram a larger number on a board? The reason I ask is because most boards with 2 Spartan 6 FPGAs are no more than $500, and having more of them on a board could lower the per-chip cost. A six FPGA unit a 1200 US$/950 EUR would be really sweet, you need to have a motherboard to use them, but they would replace GPUs in current rigs very nicely. spiccioli. |
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For the industrial motherboards with no fan directly above the board it would be possible to use every slot. That does need very good case fans then. Our solution in development will also allow every slot to be used.
Sweet. In my application, I need power density. Have you considered a design that will allow you to cram a larger number on a board? The reason I ask is because most boards with 2 Virtex 6 FPGAs are no more than $500, and having more of them on a board could lower the per-chip cost. rjk, they are spartan 6 not virtex, if I'm not wrong. spiccioli |
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Ente, I'm not able to see your images, I had to answer your message and copy and paste urls (safari and firefox on a mac). In this answer I've removed the img tag from the quote so that the url is clickable. spiccioli |
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Grabbed the winning one this morning... spiccioli |
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antirack,
what about putting a single big fan over the four low-profile heatsinks?
spiccioli
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Anyone ordering some of the new quad boards in the UK? (PM me.)
I think Chefnet is already doing a group buy in .de. Check the German forum. It seems to me, I don't speak german, they're doing a group order of single-fpga cards. I think we could make a pan-european group order for quad-fpga cards, written in english. spiccioli |
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Anyone ordering some of the new quad boards in the UK? (PM me.)
What about creating a group order for us Europeans? If we reach 50+ units price becomes interesting IMHO. spiccioli |
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719€ (25+ without vat in a company) for 1 Ztex Quad: 0,54 BTC per Day = 2€ (energy costs already removed) per day = 719/2 = 359,5 days ROI
No, it's longer since around december you drop to 1 EUR/DAY if BTC price does not double. And 25 quads it's a 18K EUR investment (even more if you have to pay VAT). spiccioli |
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P2pool is open source and there is nothing suspect in the code. Do you know what variability and luck is? 
