This is something that I appreciate about ethash (Ethereum's current PoW algo)... it is tied to GPUs (and memory controllers). One side effect is that older GPUs tend to drive higher ROI numbers vs. an arms race of always having the latest smaller nm ASIC technology.
Oh and CPUs don't work well because that drives people to create botnets. FPGAs kind of sit out there in an esoteric expensive and difficult to run island all by themselves.
Oh and CPUs don't work well because that drives people to create botnets. FPGAs kind of sit out there in an esoteric expensive and difficult to run island all by themselves.