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Technology Stocks : Advanced Micro Devices - Moderated (AMD) -- Ignore unavailable to you. Want to Upgrade?


To: kapkan4u who wrote (64277)11/24/2001 12:54:39 AM
From: Ali ChenRespond to of 275872
 
Kap, "almost 50%, is very likely running at 1GHz on a 2GHz P4."

As I recall, there were some people who aggressively
questioned the existence of half-clock regions in Pentium-4.
Here is an excerpt straight from the mouth:

developer.intel.com

"Different parts of the Pentium 4 processor run at different
clock frequencies. The frequency of each section of logic
is set to be appropriate for the performance it needs to
achieve. The highest frequency section (fast clock) was
set equal to the speed of the critical ALU-bypass
execution loop that is used for most instructions in integer
programs. Most other parts of the chip run at half of the
3GHz fast clock since this makes these parts much easier
to design. A few sections of the chip run at a quarter of
this fast-clock frequency making them also easier to
design. The bus logic runs at 100MHz, to match the
system bus needs."

Regards.

- Ali