> But when we consider the consuming power of ASIC platform, I think this board has strength.
No, it can't possibly have.
SHA is half bitshifts-by-constants. On an ASIC platfrom, those essentially refactor to no-ops. There is no way, no how general-purpose hardware could ever possibly get anywhere near even a piss-poor special purpose ASIC for this task. If you think otherwise you simply don't understand the domain. Those 600-watt ASIC systems contain multiple chips and run at tens of GHashes/s. That 5-watt chip, if it's very, very good, might maybe break 40MHash/s.
It's nowhere near fast enough. My 7970s can push out about 1.3Ghash/s and combined they are capable of around 7 TFLOPs. When (/if) they release the BFL Jalapeño it'll run at 5 Ghash/s and be powered by USB. 90 GFLOPs is equivalent to a decent processor, but nowhere near powerful enough for bitcoin mining.