[rcxdude]

GPUs are pretty good at the algorithm (certainly much more than CPUs), just nowhere near as good as ASICs. Mostly this was because the proof of work function wasn't really designed with any such target in mind, and the basic cryptographic primitives available tend to lend themselves to ASICs dominating everything else unless you explicitly design it otherwise (like ethereum's PoW which is intended to be memory bandwidth limited and thus best suited to GPUs with ASICs offering minimal benefit, or Monero's algorithm which is designed to be extremely branchy and thus best suited for general purpose CPUs).