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D.5 A Few Notes On Clocking

All of the current Alpha CPUs use high-speed clocks, because their microarchitectures have been designed as so-called short-tick designs. None of the sytem busses have to run at horrendous speeds as a result though:

Aside: someone suggested that they were getting bad performance on a 21066 because the 21066 memory controller was only running at 33MHz. Actually, it's the superfast 21064A systems that have memory controllers that 'only' run at 33MHz.



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