[bemmu]

From the Commodore book, about the early 80s:

"We actually made a couple of really hot processors for a chess tournament for somebody. He literally water-cooled it, and he ran it at something like eight megahertz. It was just ridiculous how fast he ran it."

Earlier it was explained that some processors coming off the production line could run faster than others, and they could test for it to pick the best ones for such purposes. They didn't end up increasing the clock speed for released computers, as other components could not keep up.