What chips can be “overclocked?
Just about any chip can be “overclocked.” The most popular ones are Intel 386/486, AMD 386/486, and Cyrix 486. The Motorola 680×0 series of processors do not “overclock” to as high a margin as to Intel processors and require a much better memory subsystem than Intel because they do not gain much from a second-level cache. In fact, most Motorola 68040 systems do not have a second-level cache (William Fang). II.
