RobIvy has thrown a faster clock into his PCEngine and, apparently, it was a success. Games run faster, but so does the sound. A marginal increase in speed reduces slowdown in some games without raising the pitch too much.
Unknown to more or less everyone, I give you the Korean Vistar, a recycled TurboGrafx-16. As far as I know this is the first bit of information about it in the western world.