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Rated front side bus

  • CPUs
  • Bus
  • Bus Speed
Last response: in CPUs
September 24, 2008 1:04:33 AM

I'm new here and have done some searching but can't find the answer to my question. I have an E7300 cpu. When I run CPU-Z it tells me that my bus speed is 267 and rated FSB is 1066. From searching this I understand that CPU speed equals bus speed X muliplier. My question is why is the "rated" FSB 1066 when the actual bus speed is 267?

More about : rated front side bus

September 24, 2008 1:24:38 AM

You take the fsb and multiply it by 4 to get the rated speed. This is what the rest of your components (nb and sb) will run at.
September 24, 2008 1:47:16 AM

thanks for the info but why is it muliplied by 4?
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September 24, 2008 1:50:57 AM

Well according to the A+ certification test, since P4 era the fsb has been "quad pumped". Basically it is multiplied by 4 just because that is how it is designed. No other reason for it.
September 24, 2008 3:05:13 AM

got it, I looked up quad pumping and it makes sense now. Thanks