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Seriously, the XC7V2000T is not a cost effective part for bitcoin mining. It's really targeted for ASIC emulation.
You don't say...  It would certainly not be for production use. You guys should really put out a trimmed down chip with just a crapload of LUTs/logic cells, maybe an ADC or two, and a couple PCIe lanes... like the K325 with more logic. I'm sure Xilinx knows its own market better, but the premium chips are are a bit too premium. Just sayin'...  |
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P.S. I work for Xilinx, so I can't ethically build or sell my own FPGA miner. But I want to help! Xilinx users can message me for help or advice!
For those who want to keep their VHDL/verilog private, I can execute a Xilinx NDA if you are nervous.
Cool! So, ostensibly, you could lend me an XC7V2000T engineering sample, rrrright? You're a swell guy. |
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Your wrong on if Newegg is paying in USD for their parts, they are. They are basically an eCommerce frrontend to the real Tier 1 Disti's.
I said, "from the manufacturer." You would need the entire process, from mining, refining, design, fabrication, etc. to be in USD for exchange rates to not be relevant. Their margin is very slim on most items and they make this up in that they are not actually warehousing, shipping or dealing directly with importing the parts. They do appear at times to handle things directly skipping the Disti such as when they bought and sold the fake CPU's last year or the year before but for the bulk of their product you can look at them as nothing more than a customer service web front to the backend importers. I would argue that those backend importers, the Disti's also pay for their products in dollars but I can't say that is a fact. Orders for most products are done months in advanced by the Disti's directly with the manufacturer and although those Intel chips may come from Taiwan it's Intel TechData, Synnex and Arrow are buying from and paying.
I agree that refunds would be based on what you paid but as I said if you paid 5BTC because that's what Newegg's backend API called for when doing the math you would not be a happy camper if Newegg sent just 4BTC back if the market had fallen nor could Newegg survive many returns if the market went the other way and 100 people all returned those video cards because Newegg based returns on current pricing and the price had gone through the roof. The dollar does not vary by 5% in a day, BTC does. Somebody in the exchange is going to be very unhappy.
Yes, but all of that is irrelevant. Everyone knows that a refund does not mean fair market value. I have never received a reduced refund through them, and this is the only part in their return policies that says anything like that: Out-of-Stock (Back-Order) Items
If Newegg no longer carries an item that is sent in for replacement, or if that item is simply out of stock, the item will be sent to our Back-Order RMA Department. You will be notified via email of two options: 1) Newegg can send you a comparable replacement item, or 2) Newegg can issue you a refund at the current market value of the product. A current-market-value refund may not exceed the original invoice price. If the item is returned within 30 days of the original invoice date, a full refund will be issued. If someone wishes to cash out on a low, that is their problem. I wouldn't expect Newegg or anyone else to do that. They only need an EMA on the exchange rate, profit margin, possibly a little buffer at first which they can remove over time to remain competitive, and price and exchange at or above that level. It's not rocket science. If they want to limit or reduce their risk, they can only offer certain items for sale with BTC, not offer a return policy at all on them, insure themselves by investing an equivalent amount of their risk elsewhere, etc. So let's say you have Newegg accepting BTC how does Newegg get it's dollars out of it? The exchanges are limited in the amount they can pull out in a day, MTGox is what $1000? They would have to limit sales to the amount they could reclaim to cover cost not to mention sending those dollars to DWolla or however would show up as thousands in possible international money transfers, RED FLAG IRS!
The same way we do. Yes, the exchanges are small, but once you get retail markets involved, it will expand, probably rapidly. Few are willing to tie up capital in order to be the counterparty to any deal, so they are mostly simple brokers between parties at this point. I think the better idea if for Newegg to offer on a daily basis X number of $10 Gift Cards, limit per user to say 5 (yes some people would just backdoor multiple accounts). They could thwart the scammers by offering those cards in batches spread throughout the day so one users could be sitting at his PC with multiple accounts open at 12:01AM PST in order to pick up ever single Gift card.With a limited number of cards in the wild they should be able to cover any withdrawals they need to make per day to cover the dollar cost of the cards, the price of the cards are fixed and Gift cards are not refundable. Now if you use that card today or a month from now doesn't overly matter and any returns would be based on the dollar price of the product purchased with the gift card. There may be some legal room in there too since they would only be exchange a card for BTC vs. BTC for a physical product.
Good idea. At least it's something. |
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Given the time and electricity cost, only those very high end card can generate a profit
It all depends on timeframe and investment. As long as the kWH/BTC is less than the tradable price of BTC then it is profitable depending on how patient you are. I started mining about 5 weeks ago, I bought a new midrange card for it. I have now just about broken even on that card with regard to the BTC I've generated. No, I can't quit my job, but it does effectively reduce the cost of the new card (that I can then use for games) to zero, assuming I cash in my BTC for "real money". Technically I have "profited". "Profit" is relative. With regard to BTC a huge pitfall people hit is that PROFITABLE has to mean I CAN LIVE OFF THE MONEY GENERATED. That's simply not going to realistic and, frankly, trying to achieve that is reckless. True, some people do that, but some people also win the lottery, and spending your paycheck on lottery tickets is never considered a stable form of income. Financially, profit is a positive difference between revenue and expenses. If you only count revenue as profit, you are ripping yourself off. Maybe you will profit psychologically, but is that what we're talking about? |
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Up to and including definition #6? |
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Diablo, I ran into a few NPEs from commit 63d5dbb9732c6253cde2ae962aa2ae456f4ce02f. Would you like a patch sent somewhere?
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It will never pay itself off unless you pay ~$63 for the card.
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The post concerning returns needs to be addressed and I don't see anyone doing that. If you bought that $200 video card for 16BTC and wanted to return it a week later and the current USD price of BTC was $10 would you expect Newegg to send you 20BTC, credit of $200. Maybe they should just return the 16BTC minus fees, I doubt anyone would be happy with that now would they? They certainly are not going to issue you a check, they can't credit your CC so should Newegg be forced to maintain a BTC bank for returns or program a Dwolla draft so they can convert dollars into BTC to send you?
I just don't see this happening. Where is the incentive? They would clearly need to see a huge markup in the price of the products in order to accept BTC and to cover their margins. Who would stand for paying 10% higher for using BTC than cash, kind of defeats why your shopping at Newegg to begin with?
Most computer hardware is probably not purchased from the manufacturer in USD, and the USD exchange rate changes quite a bit each day, but have you ever heard about anyone correcting for that? Refunds return what you paid, not fair market value. The incentive was already mentioned. If customers would pay a premium to use BTC over USD, that is profit. "Maintaining" a BTC account would probably be worth it, considering the effort required is close to nil. Software development to enhance their shopping cart, if done by someone competent, should only take an hour or two. Even on small margins, that would pay for itself rather quickly if they can fill their orders. |
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I say this as a person about to put $4000 into an epic mining rig, and having serious last-minute doubts. Does this not concern anyone? The value of Bitcoin is slowly rotting, on low volume. Difficulty has also peaked. I'm also finding a common theme on these forums - SUPPORT BITCOIN! INVEST! Why does it need your support? If it's viable and has value, why does it need any artificial support? You wouldn't happen to be a large crowd of bagholders slowly realising it, would you? Pic related - from bitcoin charts.  It needs value and volume, not high a high dollar price. It is also likely to be quite inflated right now and "rotting" due to speculators meeting resistance. |
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The HDD is not necessary. |
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What is our current form of our justice? Why is it so righteous?
Rule of LawThere are two of those, though. |
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I have no intention to mine, but rather I want to spend the bitcoins in my wallet. And it should not matter on which PC I am logged in. I want access to the same wallet.
It's a bad idea, anyway. You really should use the JSON API sendfrom or sendtoaddress calls. |
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Uncompromising love,
R
Where are P, L, and U? |
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Could you explain a bit more in detail? I would really like to port it with the least effort.
Oh, there are so many. Basically, you switch your widget toolkit to something multiplatform and rely on those bindings instead of Microsoft APIs, ..., and then you're done. Here's a list of the most common ones to get you started on your research, since I don't know what your app currently looks like (source level): wxWidgets/WX.Net GTK+/GTK# Qt FLTK Also there are multiplatform frameworks available that target android and iOS. But i'll stick to the desktop version for now and make it platform independent... Challenging, but fun As for Android/Apple... if there are any decent ones, I wouldn't rely on any of them at this point. For the most part, the answer is, "No." You have things like Appcelerator's Titanium to help get you up and running, but I would probably individually implement these as clients to web services and just keep them as light as possible. Mobile devices implicitly rely on connectivity, so I don't consider that a downside as many do. |
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Am i mistaken in thinking there is an issue with some people investing hundreds of dollars into video cards to create basements full of mining computers
Mining is both necessary and self-limiting. Too much mining power will make it unprofitable for all but the few, and that may be an issue, but the early adopter problem is an issue regardless. It is a natural system and will balance itself out. interfering with both the value of Bitcoins
It most likely does not. and of graphics cards?
This is certainly an issue for people who just want an old video card, but regarding mining, see my first point. |
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i have a GTS 250 graphics card, what do i have to do to use it to mine, i can't find opencl devices. HELP
You need an alchemist to convert it either into an AMD card... or gold. |
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nope, didn't do the trick.
If I get it right, I have installed opencl in the nvidia version and need to overwrite it with the ati version.
So I need to overwrite libOpenCL.so and libOpenCL.so.1 with the ones from ati-stream-sdk-v2.2-lnx3. But libOpenCL.so.1 is missing there?
Did the error change? Do you have your ATI platform files in /etc/OpenCL/vendors/? What is the output of these: ls -la /usr/lib*/libOpenCL* ls -la /opt/ati-stream-sdk-*/lib/x86 ldd <the binary file from your pyopencl install> |
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aticonfig --adapter=all --odgt
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It looks like there may be two OpenCL distributions installed. As a test:
mv /usr/lib/libOpenCL.so /usr/lib/libOpenCL.so.bak
ln -s libOpenCL.so.1 /usr/lib/libOpenCL.so
Then try again. If that doesn't work:
rm /usr/lib/libOpenCL.so
mv /usr/lib/libOpenCL.so.1 /usr/lib/libOpenCL.so.1.bak
mv /usr/lib/libOpenCL.so.1.0.0 /usr/lib/libOpenCL.so.1.0.0.bak
export LD_LIBRARY_PATH=/opt/ati-stream-sdk-v2.2-lnx32/lib/x86
Then try again.
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why on earth would you need a 1600w power supply for 6950s?
It's probably built as a general purpose/gaming machine, not a trimmed down mining machine. 6950s are 200W stock and far more overclocked for gaming, since the RAM is not underclocked in that case. That puts you at 800. Add another 350 for the base system and peripherals and you're at 1150. That's over the 90% mark for a 1200W PSU. Add a meager 25% for overclocking and expansion and you're already over 1400W. If it was just for mining, he could have gotten away with a 1200W, for sure. |
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