I have question in my mind now for maybe 2 weeks already. As I can see, new efficient miner would not come out any time soon (and I'm not capable of writeing one by myself). I'm thinking to replace my Pentium G3220 with way more powerfull i5 4460 with 4 cores. My idea is that CGminer is using CPU at 100%, so if I give it power boost with powerfull CPU, maybe I can squeeze more hashes from GPU? Any oppinions is very welcome, than I will decide what to do.