" Can someone explain to me the rules of CPU multipliers and correspondent
FSB speed ? "
The speed of the frontside bus is the basic clock speed of the motherboard.
Many system components (including the processor and the PCI and AGP buses)
run at speeds derived from the frontside bus speed. In general, a faster
frontside bus means higher processing speeds. How fast your processor
actually runs in your computer is determined by applying a clock multiplier
to the frontside bus speed: for example, a processor running at 550MHz might
be using a 100MHz FSB with a clock multiplier setting of 5.5 (most boards
offer several clock multiplier settings, although CPU manufacturers now
often *lock* the multiplier to a specific setting). For some processors, the
FSB speed can be increased to boost processing speed (called
*overclocking*). The PCI and AGP buses, which usually run more slowly than
the frontside bus, use dividers to reduce the clock speed.
