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No, the speed increase in other processors is not slowing down at all. The CPU developers have simply changed their methods of achieving the speed-increases. They don't do it by drving up the clock speed anymore (not primarily anway), but by optimising the internal structure of the CPUs. Examples are simultaneous multithreading (permits multiple independent threads to better utilize the multiple execution units of modern CPUs), integration of memory controllers into CPUs, putting multiple CPUs on one chip, increasing the size and speed of CPU's caches and the list goes on.

 is a RISC OS UserJGZimmerle on 29/3/06 11:36AM
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