I registered with CoinWorker today, to give it a try and I would like to share my experience with you. I picked a task to answer questions about what people felt about a movie called Project X, judging by their tweets. At the beginning, I was in training mode. The system was asking me questions so I could get the hand of it. I think there were 12-15 question in training mode. After that, the real thing started and I was trying to figure out what the people were feeling about the movie. The payout was 6 points for every 3 pages work, each page containing 4 questions (i.e. 6 points for every 12 questions). I answered 15 pages of questions (not counting the ones in the training mode), which is 60 questions and spend about 45 minutes. I checked my account and the balance was 0.067BTC. At that rate I was able to make 0.089BTC per hour (this is roughly 37 euro cents per hour with today's exchange rates). I guess those kind of questions were too difficult for me.... I might try sometime with a different task and see how it goes  But let me clear something out. The service WargeGeoshington provides is not bad at all. This post is only about my experience. For other people, it might be a lot more useful. Try Amazon's Mechanical Turk and see how well you fare. Bet CoinWorker pays better than mturk. |
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You cant, unless there is some sort of crazy usb to pci-e device =) I'm pretty sure the use for these with mining would be as a host for FPGAs or maybe to run monitoring on a farm. You could probably also run P2Pool on this if you wanted to.
there might be, i saw some article for external vidcards for laptops once ... Seemed vaporware tho. or maybe 1st of April joke. Nope, they are real. They use PCMCIA cards or Expresscards and convert to PCI and/or PCIe. Here is one example of such a product: http://www.netstor.com.tw/_03/03_02.php?ODI |
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Large-format FPGA people won't bother with most commodity hardware in such a manner. They know the value of their time, and want something fast and reliable, so they choose something turnkey like LargeCoin.
By the same logic, Google would also choose something turnkey instead of off the shelf hardware, since they know the value of their time. The key thing to remember is whether your custom solution is actually cheaper than the off-the-shelf solution. Let's take the example of singles vs. largecoin: LargeCoin is supposed to get 20ghash at 100 watts, in a 1U rack formfactor. BFL singles do ~830mhash at 70 watts (before PSU losses). So, about 25 Singles to each Largecoin. 70x25=1750 watts. Space taken up would be a lot more than 1U, not sure how you would fit it into a rack properly anyway. ~$599x25=$14,975 plus shipping. LargeCoin was (for a brief moment) $15,000, but presumably that is sold out at that price and it will go back to $30,000. Now, assuming you were a lucky first-25 LC customer at 15 grand, we can compare the 2 solutions based on price. Most anyone has 1U somewhere and 100 watts is just another lightbulb's worth of power and heat. 25 Singles is probably going to take up a bit of square footage, but if you have the space that is cool too. The main killer I think would be the power - sure 1750 watts is the same as a powerful quad 6990 rig with an OC, but it is 17.5x the LC wattage, not to mention associated cooling. If you have free power, BFL is the way to go. It just has drastically reduced scalability. Now let's say you were too late, and LC is going to cost you the full 30k. If you have free power and lots of space, BFL is certainly the winner. You could even develop a watercooling system just for them. But if you want to put them in a datacenter, I'd say that 25 would probably take up 6 to 8 U for a bunch on a shelf with some fans for cooling, and a 1U atom-based rig to run them. Calculations based on 19x29 inch rack and BFL measurements of about 4.5 inches cubed plus space for air and wires (15 per 4u shelf). Since power and space are the primary cost of any datacenter, LC starts looking better (although still not very competitive). The only other main point is reliability. Where there are more parts, or more moving parts, or more anything, there is more to fail and go wrong. LC being a single solid-state appliance with presumably just a few fans would likely be less hassle than 25 units with 3 fans each, statistically speaking. |
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I was going to give a percent of the money to p2pool but I'm really put off on their .5% hidden fee. I need to see how aware people are of this before I move in that direction. I definitely wasn't aware of this fee. It isn't "hidden", and you can adjust the fee to whatever you want, including disabled (no fee at all). I believe that recent versions have it disabled by default anyway. |
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Similar ones I've seen only have something like a .6A 5V rail, so just management connections I would think.
So it sounds like my best bet may actually be to get a "regular" PSU for the low voltage, and use these for the 12v bulk? I was hoping to avoid a mix-'n-match situation, but if I can't avoid that, then does anyone know of a good PSu that provides lots of +5v and +3.3v? Don't need much +12v, but it needs to be reliable. Why do you need a "lot". Most modern MB pull 90%+ of their current from the 12V rail. 3.3V was used a lot a decade ago when CPU run at 3.3V. Today with memory, RAM, northbridge, etc all using different voltages (and all below 3.3V) the MB simply pulls enough current on 12V rail and does DC to DC conversion to voltages as needed. Somewhat off topic hopefully someday we can scrap 3.3V and 5V and simply make the next ATX standard just 12V. Nothing but 12V. I dunno, to be honest. I guess I just like having everything connected. Who knows if some options cards use it, if this is in a different application. |
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Would it be feasible and affordable to do water cooling on a large FPGA mining cluster with hundreds of FPGA chips instead of AC and airflow cooling?
For instance each radiator (that's what they are called, right?) could be covering 4 FPGA chips. As you can probably tell, I have no idea about water cooling and I have no idea if stock equipment is available that could be used.
But if FPGA prices come down, and somebody is going to build a larger cluster of hundreds or thousands of boards, they will eventually run into cooling problems.
Say you are building a rig box equivalent of 50.4 GH/s, that means you already have around 250 FPGA right there.
Large-format FPGA people won't bother with most commodity hardware in such a manner. They know the value of their time, and want something fast and reliable, so they choose something turnkey like LargeCoin. Watercooling is difficult at best, and FPGA based bitcoin miners don't really have a standard way of mounting a waterblock, for example. |
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Similar ones I've seen only have something like a .6A 5V rail, so just management connections I would think.
So it sounds like my best bet may actually be to get a "regular" PSU for the low voltage, and use these for the 12v bulk? I was hoping to avoid a mix-'n-match situation, but if I can't avoid that, then does anyone know of a good PSu that provides lots of +5v and +3.3v? Don't need much +12v, but it needs to be reliable. |
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That particular PSU only has 12V output :-)
I'm fairly sure I saw a 5v bus when I had it open. Have you opened the PSU up yet? Maybe tracing the connectors to where they go inside the PSU might help you determine what circuit turns it on.
Using connectivity tester or multi-meter might help with that (w/ unit unplugged to avoid destroying it). Doubt you will be that lucky but seeing for example two pins connected to a relay or micro controller likely is the "clue" you need.
Yeah I've opened it up, but it is far more compact than most PSUs and tracing things is extremely difficult. Several heatsinks in the way that I am loathe to remove because it could cause thermal issues if done incorrectly. Arent these just generic redundant PSU modules?
Pretty much. |
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I've been sitting graduated and out of school for 2 weeks now. Bitcoin.su has been receiving a lot of my attention but I need to immediately put more money in my pocket and I need people.
Because I'm also a greedy bastard hungry for more Bitcoins, I will now be applying for a 40+ hour job wherever I can find one, with the goal of accumulating as many Bitcoins as possible.
I will also use this as a social experiment to show what it's like for low-wage workers to be paid in money that gains in value, in addition to saving it as opposed to our inflationary economy.
Places applied:
Walmart (4 locations)
Panda Express
Write up a diary for us, it could be called "The angsty rambling of the greedy teenager, Part 1: In which I discover Bitcoin" |
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Well, for starters I can't be bothered to look through the cgminer thread to find out what I am doing wrong. What flags are usually used for no gpus and only BFL units with cgminer? For ufasoft, I use this: bitcoin-miner-x64.exe -i 2 -o http://user:pass@pool.com:8332 And I can add and remove devices without a software hiccup, since it recognizes them as soon as they are plugged in. If you're using the cgminer binaries, it won't work - BFL is disabled by default, you need re-compile it with it enabled. Ah that's where I was tripping up. I like the plug-n-play ufasoft version, so I don't have to specify each device, but I want my BAMT charts and graphs  |
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What's the bounty for figuring out the wiring?
I didn't post one, but that is a good idea. I have already called Dell, but they refused to give me spec sheets or any such data for the PSUs. How much do you want? I'd be wanting more than just the pins to turn it on, since I intend to use all the outputs properly. That means 3.3v, 5v, -12v, pwrgood, enable, and so forth. Do you know what server uses that PSU? If so might find some info in the manual for the server. Dell M1000e blade servers, with 6 PSUs per server. I've looked at its manual, but no go (other than telling me that they also offer a 2700 watt version in the same formfactor). |
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What's the bounty for figuring out the wiring?
I didn't post one, but that is a good idea. I have already called Dell, but they refused to give me spec sheets or any such data for the PSUs. How much do you want? I'd be wanting more than just the pins to turn it on, since I intend to use all the outputs properly. That means 3.3v, 5v, -12v, pwrgood, enable, and so forth. Add a pic of the label? Here you go, I spent several hours googling it to no avail.  |
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Honestly miners only include transactions in blocks to be nice.
Time and resources better spent increasing adoption, improving wallet security, and promoting Bitcoin.
Great, all miners let's not include any transactions and just mine for new blocks as long as the reward is higher than for transactions. So you really think that will 'increase adoption' and 'promote Bitcoin'? That would make mining for blocks a rather useless exercise, because until the new block reward dropped substantially in a few years from now hardly anyone but miners will use the system. Yes that's just the other extreme view, I hope reality stays somewhere in between, to actually enable sufficient adoption (meaning using this currency for transactions and pay stuff with it not just hoard and speculate with coins). Sooooo 'nice' to let other kids play in your sandbox too. You have some other solution for when the subsidy no longer exists? Or are you just trying to milk it until you think you have squeezed everything out of the economy that you can? 0.01 BTC tx fee is not unreasonable. |
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What's the bounty for figuring out the wiring?
I didn't post one, but that is a good idea. I have already called Dell, but they refused to give me spec sheets or any such data for the PSUs. How much do you want? I'd be wanting more than just the pins to turn it on, since I intend to use all the outputs properly. That means 3.3v, 5v, -12v, pwrgood, enable, and so forth. |
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Postan 4 teh lawlz
spam
Neither of these two posts add anything to the thread. I am really trying to keep this thread clean. It's something called "irony". Google it. |
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The pump did arrive today. UPS ground and it got here in 2 days. It is impressive. Everything about it screams build quality and performance. Did some testing and ended up soaking myself. Even at 10ft of head it moves a ton of water. Lol, I bet the sequence of events was something similar to the following: Hell yes, the pump is here! *rips open the box like a kid at christmas* Lets see if it works - *plugs in for only 3 seconds with no primer water, cause 3 seconds won't kill it, right?* Sweet, it works. *runs off to the garage to attach some hose to the intake, and maybe a little bit to the output* *fills up tub of water, primes pump and plugs in again* Oh shit son, water everywhere hopefully none got on my rigs shitshitshit *stupid grin while cleaning up the mess*  |
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Shit son, that is expensive! I'd rather gang together a bunch of $100 PSUs, but the issue at the moment is that I don't know the correct pinout to connect to them with HP (EDIT sorry it's a Dell) 2360 watt blade server PSU. |
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Hello fellow bitcoiners, Since BFL singles are flying out all over the world to eagerly awaiting purchasers, I wanted to start a thread to find and list the best settings to use with the single. So if you have a single and have tested some settings, share them! Thanks, gigavps * Looks at Fred0  Well, for starters I can't be bothered to look through the cgminer thread to find out what I am doing wrong. What flags are usually used for no gpus and only BFL units with cgminer? For ufasoft, I use this: bitcoin-miner-x64.exe -i 2 -o http://user:pass@pool.com:8332 And I can add and remove devices without a software hiccup, since it recognizes them as soon as they are plugged in. |
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How is it free coins if people who use the service have to pay your fee?
Think of it as a way to have a no-fee transfer, if you calculate how much you put in properly. |
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