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What is the relationship between FSB and CPU core frequency?

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November 4, 2010 5:08:52 PM

What is the relationship between FSB and CPU core frequency?
a b à CPUs
November 4, 2010 6:01:18 PM

FSB * Multiplyer = CPU Speed

EG: 333MHz FSB * 10x Multiplyer = 3.33GHz

Note: Most FSB are measured in speeds ranging in the hundreds of Mz, although they are sometimes stated as 1332, 1600, etc. If so, divide by 4 to get the actual FSB speed. [The FSB on intel chipsets is quad pumped, hence the divide by 4 operation.]

On newer systems, the equation is simplified to:

333MHz * Multiplyer = CPU Speed

Note the only way to OC now is to change the Multiplyer, as there is no more FSB.
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