Sure, if you can come up with a good proof-of-work algorithm that runs well only on CPUs.
It could be possible. The straightforward way would be, I believe, to use an algorithm that has weak parallelism and depends strongly on branching. CPUs are king of branching, and both GPUs and ASICs get ahead by taking advantage of parallelism.
Although, one nice thing about GPUs being the standard-bearer, is it makes most general purpose server hardware useless for mining. That's good in that it makes hijacking a webserver to mine bitcoins, a largely pointless affair.
Sure, if you can come up with a good proof-of-work algorithm that runs well only on CPUs.
It could be possible. The straightforward way would be, I believe, to use an algorithm that has weak parallelism and depends strongly on branching. CPUs are king of branching, and both GPUs and ASICs get ahead by taking advantage of parallelism.
Although, one nice thing about GPUs being the standard-bearer, is it makes most general purpose server hardware useless for mining. That's good in that it makes hijacking a webserver to mine bitcoins, a largely pointless affair.