sentence: even so , several asynchronous cpus have been built , including the ordvac and the identical illiac i ( 1951 ) the illiac ii ( 1962 ) , the fastest computer in the world at the time the caltech asynchronous microprocessor , the world-first asynchronous microprocessor ( 1988 ) the arm - implementing amulet ( 1993 and 2000 ) the asynchronous implementation of mips r3000 , dubbed ( 1998 ) the seaforth multi-core processor from charles h. moore optical communication one interesting possibility would be to eliminate the front side bus .