[CPU Speed] Dual Core? .

Discussion in 'Hardware Components and Aftermarket Upgrades' started by Undertaxxx, Jul 8, 2009.

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  1. Undertaxxx

    Undertaxxx Notebook Consultant

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    Okay so I have a kind off stupid question.

    I know dual cores have core speeds and Front bus speeds .. But, lets say my cpu had 2.2 Ghz, and my FBS is 800 mhz, does this mean i have 3 ghz in total? or do i just look at the highest (in this case 2.2) and take that as my cpu speed?

    Also is i have 'dual' core, does this mean i have 2 cores running at 2.2?

    Gz, Under~
     
  2. Andy

    Andy Notebook Prophet

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    2.2GHz is the CPU Speed. Since its dual core, so each core has a maximum frequency of 2.2GHz.

    FSB is 800MHz, or to be precise 800MT/s. The actual FSB frequency is 200MHz. Because the FSB is quad-pumped (performs 4 transfers per clock cycle), it is rated at 800MT/s or 800MHz. (MT = megatransfers)

    FSB connects the CPU to the northbridge (or memory controller hub basically). So faster the FSB, quicker the CPU and the memory controller will communicate with each other.

    At the moment the communication b/w the two is at 200MHz or 800MT/s.
     
  3. King of Interns

    King of Interns Simply a laptop enthusiast

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    Yes you have 2x2.2ghz. The fsb governs the speed of your ram. So your ram will be running at 400 mhz at stock cpu speed of 2.2 ghz. On a 1066mhz fsb the ram runs at 533mhz and 1333mhz 667mhz. Your total processing power is 4.4ghz.
     
  4. Undertaxxx

    Undertaxxx Notebook Consultant

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    okay thanks :D Now i know what that FBS stands for!
     
  5. sgogeta4

    sgogeta4 Notebook Nobel Laureate

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    While you have two cores at 2.2GHz, it doesn't necessarily mean processing power is 4.4GHz since processing power rarely scales linearly with more than one core. Also, RAM speed is totally separate as there are memory dividers to the FSB. Just because your RAM runs at a certain speed, doesn't mean your FSB is running at a similar speed. While clock speed has some importance, unless you're running intensive calculation programs, then not much difference will be seen between faster processors. FSB also has little (if any) importance since the speed between the CPU and memory controller is never saturated in order to take advantage of faster FSB.
     
  6. moral hazard

    moral hazard Notebook Nobel Laureate

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    CPU speed = FSB times a "multiplier"
    in your case, (800mhz * 2.75) = 2200mhz
     
  7. TehSuigi

    TehSuigi Notebook Virtuoso

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    Or more accurately, since the base clock of the 800 MT/s FSB is 200 MHz...
    (200 MHz * 11) = 2200 MHz CPU clock
     
  8. Undertaxxx

    Undertaxxx Notebook Consultant

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    I see! Thats why my max multiplier is 6, thx guys!
     
  9. TehSuigi

    TehSuigi Notebook Virtuoso

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    You mean your MINIMUM multiplier is 6 (for a speed of 1200 MHz). ;)
     
  10. PurpleSkyz

    PurpleSkyz Notebook Evangelist

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    Actually, you dont because noone here has said what it stood for.

    Front Side Bus. :p
     
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