Inside a better CUDA-based Scrypt miner

I was very eagerly awaiting the optimizations mentioned in part 1[0]. Unfortunately the optimizations work primarily on the Kepler architecture (Geforce 6xx, 7xx, and the GridGPU chips on EC2) and not the older Fermi chips that are so popular for CUDA/Scientific Computing. All that said those quoting khash figures still seem to be getting poorer performance than the GTX 580, so I've got no right to complain.[1]

In any case it is very commendable that someone is making an effort towards bringing nVidia GPUs performance in line with that experienced by AMD owners. I'm glad someone with experience in memory usage optimization is looking into this.

To Dave: If you're reading this then thank you from the collective of nVidia GPU owners.

[0] http://da-data.blogspot.ca/2013/12/briefly-profitable-alt-co...

[1] http://da-data.blogspot.co.uk/2013/12/scrypt-mining-changes-...

Previous discussion of part 1: https://news.ycombinator.com/item?id=6889027

Greatly thankful to Christian Buchner, and now Dave, who have helped double my hashing