*sigh* I have better things to do with my time than deal with this.
My personal opinion:Nothing indicates to me this is real. Until further notice, I do not advice purchasing this product.We used fpga miner as a starting base to develop our design. When we said it is 'compact' we meant it fits into 45K gates.
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If you used the
Open Source FPGA Bitcoin Mining project as your starting base, I am making you publicly legally aware that that project is covered entirely by the terms of the
GNU General Public License. By using any part of the Open Source FPGA Bitcoin Mining project, you must conform to the legal obligations set forth in the GNU GPL. If you do not conform to the legal obligations set forth in the GNU GPL, you will be prosecuted in all applicable legal jurisdictions.
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our asic has 45K logical gates and gathers 500 Mhash\sec at 120MHz and one cycle per full-hash.
SHA-256, by its very nature,
cannot be optimized.
(1) The Open Source FPGA Bitcoin Miner uses 75K Altera Logic Elements to perform a full Bitcoin hash per clock cycle. This translates to somewhere between 225K gates and 975K gates. You say you get ~4 Bitcoin hashes per clock cycle from 45K gates. This is massively incorrect on your part.
(1) For curious parties, SHA-256 itself cannot be optimized. Optimization of SHA-256 is akin to an attack on the algorithm itself. You can, however, provide application specific implementations that exploit constant data in various ways. This applies to Bitcoin, as it does have some constant data fed into the hashing function, but only to a limited extent. The 75K Logic Elements figure I quoted above is already taking advantage of a good majority of these optimizations.