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Hello community member,,
We must fight bitcoin evil. Please send your bitcoin to 1BVDWswBCGv3z73hEEoH2a7pBtakXSihXF, with this we can ban it !! and evil will be gone.
Thanks you,
BVDW
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Then as the temp climbs and levels out in the low 80s, the hash rate drops a bit and settles. When I opened the case and got some additional fans going, if I can keep the temps in the mid to upper 70s under load, both cores are able to stick near 400MH/s. Does the GPU fan (or fans) run at full speed? I found that (in Windows) my 6950 would happily go past 90C and the drivers wouldn't bother increasing the fan past 38%. Manually putting it up to 45% brought it down to 80C. |
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My apologies, then. I haven't done much with Altera chips; I don't know how the footprints convert from Xilinx's units.
Fair enough. Xilinx likes to show off huge gate counts with lots of zeros. It is very misleading. |
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The 1200K gate board has less LEs than the DE0-Nano and costs $189. |
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There is also a great Pull request that was submitted a day or two ago. It allows the design to scale down to fit into smaller chips, which I know a lot of people have been waiting for. I'm just waiting for some free time to open up so I can dive in, test the new patch out, and merge it. Many thanks to udif for submitting such a wonderful improvement! Excellent.  Does anyone know of a board under $100 with more LEs (or equivalent arbitrary unit) than the DE0-Nano? http://www.terasic.com.tw/cgi-bin/page/archive.pl?Language=English&No=593I'm looking for a board for various student projects - near-free mining should help pay off the board. |
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Hmm, you could have split the first one into 0-99.9 and 100-999.9. That would show if there are still any CPU miners. |
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You're right, stealing resources is wrong. It isn't stealing. If you go to a site with scripting enabled, then you are inviting that site to run scripts. It is a bit of a dick move though. |
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Why else would the difficulty level drop a large amount EXACTLY when difficulty level increased? Assuming you mean why the hashing power would drop, there are dozens of possible explanations. |
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And nvidia games better than ati. (sorry, fanboys) First benchmark I looked at: http://www.tomshardware.com/charts/2011-gaming-graphics-charts/3DMark11-Enthusiast,2660.htmlThey're looking pretty much neck and neck to me. Perhaps 5-10% performance difference at certain price points. Where is the evidence that they "game better"? Overall there appears to be very little difference, with the exception of certain GPGPU applications, some of which favour certain cards (bitcoin mining being an obvious example). |
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No, everyone is working on the same block at the same time Well, everyone is working on the same numbered block, but each person is trying to make a block that pays BTC to them (or their pool). I don't understand
It's like rolling a giant die with billions of sides (numbered 1 to billions), and trying to get it to land on 42. The chance is the same each roll. |
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I'm going to go out on a limb here and say that it might be about 430000 in about 50 blocks.
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Is it down?
I hear fans spinning up again. Nevermind. |
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I did not look at the code but maybe you can clarify to me how this particular approach scales; It should scale linearly. How would one scale this to multiple FPGAs? Some communication between devices would be needed, or will there be a full TCPIP stack communitcation with bitcoin on each one? There are many approaches. You could have one master block (with a basic TCP/IP stack) that distributes the work amongst all the other FPGAs if you wanted to eliminate the PC entirely. I guess my confusion comes from my PC coding mindset. In the GPU implementation we just create the "unit" calculator and the GPU knows nothing about communicating to and from the bitcoin protocol, it just has an algorithm and a memory space to work with. If I'm correctly understanding the current implementation, that's pretty much what it does. A script running on a PC handles the communication, and hands the work to the FPGA over the USB interface. |
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A Spartan 3E 250K has 5508 logic cells. If I understand correctly, this is not enough for a design that needs 90K LUTs, though I'm still learning about all of this. I'll try to put my serial design online as well. That fits into 3K or 4K I think, although it's obviously much slower (64 cycles per hash). It's a nice toy for people to play with if they have smaller boards. That would be very much appreciated. Many low-end boards could fit half a dozen of these, and you could pack some into the remaining space on a higher end board to approach 95-100% LUT utilisation. |
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