Well, I read the whole "NVIDIA Kepler (K20) from 134MHash/s to 330MHash/s with CUDA" topic. As far I know psychocoder has optimalized the cuda code for the GK110 architecture (sm_35 in cuda). There was only 2 card supporting this: Tesla K20, Geforce Titan, but from yesterday you can buy the Geforce 780! It is the same arch, a little cheaper and more consumer. If I had enough donations, I will buy one.

My solution is speeding up the older generations: Fermi and Kepler(sm_20, sm_30), that means geforce 4xx to 6xx. So I hope I can merge them together.

I sent a binary to gaborjakab, others please wait and keep me posted.