64-bit CPU

Peter L. Peres plp-ysDPMY98cNQDDBjDh4tngg at public.gmane.org
Thu Sep 16 16:09:30 UTC 2004


On Wed, 15 Sep 2004, Sergey Kuznetsov wrote:

> There is no any decrease in speed, because the bus also 64-bit, it means it 
> can deliver 64-bits of data in one-two CPU clocks.
> Therefore if it's architected correctly, in 32-bit mode can be delivered 
> 2x32-bit words, it probably can give ~35-50% of
> speed up for memory intence operations.

That requires programs optimized for this type of cpu afaik. Many (most) 
data accesses will be on 32 bits or less unless high level programs are 
rewritten to specifically avoid this. Afaik current multimedia programs 
for PC are written with 32-bit optimisation and would probably clash with 
the 64 bit mode.

Peter
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