> A memory-hard puzzle resists that consolidation, because specialized chips have enormous computing power but no comparable advantage in memory bandwidth, and memory bandwidth is the bottleneck here. The gap between a twenty-thousand-dollar server and a four-hundred-dollar laptop stays small enough that everyone retains a real chance of finding blocks. The cost of egalitarian mining is that your fan spins. That is the whole cost.

I think one can build specialized hardware with memory bus megabits wide so that memory bandwidth will be enormous. for specialized algorithms one can optimize memory traffic in the same way compute is optimized for other specialized algorithms.