HI, folks

SHA256 is the core for Bitcoin mining.
https://www.kncminer.com/
KNCminer provides a Hardware(ASIC, 20nm/28nm) Bitcoin mininig system.

Could anyone comment why need 20nm for multi-SHA256(multi-Core) design?
Can we use a FPGA to implement this function?
Is it need a higher speed than FPGA?


thank you in advance.

> Could anyone comment why need 20nm for multi-SHA256(multi-Core) design?
That's because with smaller elements one can achieve higher frequencies and higher operations-per-watt ratios. With larger elements you'll have lower frequencies and worse power consumption and thermal dissipation, so you'll have to spend more real money for the same amount of those virtual bitcoins.

> Can we use a FPGA to implement this function?
Of course, one can use FPGA implementation but performance would be rather miserable. Remember that there are to many ASIC bitcoin miners nowadays, so complexity (it's not fixed, you know) was increased too much.
Btw, some studies show that bitcoin ASICs are not just so-called hard-copies but their designers even use custom hand-crafted element libraries to achieve better density of elements, i.e. chip design is heavily optimized (smth that is impossible with FPGA).

If you are interested in implementing miners, you can try litecoins, their complexity is not so high (e.g.: it's even still possible to mine them using GPGPU) although I don't know about required RAM amount, may be it's too high for FPGA.

YES YOU CAN DESIGN ON fpga

can you please give me your code

I'm new to this forum, but I keep reading this kind of statement, which puzzles me:


All cores on OpenCores are open-source, so there is really nothing to "give" per se, right? You just check out the project with SVN and there you go. Yet I have seen this kind of demand in many topics, why is that?