Are there 2 FSB Concepts?

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Hello. I have shuttle ak32 mainboard.

In the specification there is written:
1)Support Socket462 package CPU with 200/266 MHz FSB
2)Self configuration FSB (The FSB speed is software configurable from 100MHz
to 166MHz by 1 MHz step in the Frequency/Voltage Control of BIOS setup

- So one FSB is 200 or 266 and second is 100-166. Do I think well that this
Socket 462 FSB can not be changed and the 100-166 MHz FSB is for
overclocking?? (Why 2 FSBs?) And if the second FSB is for overclocking then
how should I know the nominal value if I only know that FSB of my processor
is 266 MHz? How do you call this nominal value if 266MHz for my processor is
called FSB?

Please, help!!
(I can't understand this 2 FSB concepts)

Re: Are there 2 FSB Concepts?

On Feb 27, 2:14 pm, "Przemek B." <przembWIADOMO_COastercity-kropka-
net> wrote:
Quoted text here. Click to load it

You have a main clock, which drives everything.
e.g. say your main clock is 133MHz.
your fsb is double pumped so it runs at 266MHz
your ram IF running 1:1 will run at an actual 133MHz, or 266MHz
effective - this is also based against the main clock
your cpu - say you have an athlon xp 1500+ has a x10 multiplier -
133MHz * 10 = 1.33GHz

pentium 4's and core 2's use quad pumped fsb.

athlon 64's hyper transport paths run with a configurable multiplier
against the main clock. For 754 and a few low end 939 mobos, it was
800MHz, i.e. 1600 Mega TRANSFERS (2 way, so it's reported as double,
but that's marketing!). main clock on these chips is 200MHz, so the HT
multiplier was x4. For most 939 and am2 it's 2000MT (mega transfers)
or 1000MHz HT bus, which is 200MHz on a x5 multiplier.

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