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duo processer

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  • 18-01-2009 10:03pm
    #1
    scully74
    Banned (with Prison Access) Posts: 202 ✭✭


    when you have a duo processer say a 1.5ghz does that give you a 3ghz machine 1.5ghz x 2 = 3ghz.........


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    #2
    Alanstrainor
    Moderators, Motoring & Transport Moderators Posts: 23,157 Mod ✭✭✭✭Alanstrainor


    scully74 wrote: »
    when you have a duo processer say a 1.5ghz does that give you a 3ghz machine 1.5ghz x 2 = 3ghz.........

    Nope, unfortunately, 1+1 does not = 2 in that case. It gives you two 1.5Ghz processors, which means your machine will be able to run more applications simultaneously.


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    #3
    The_Conductor
    Moderators, Society & Culture Moderators Posts: 32,279 Mod ✭✭✭✭The_Conductor


    In a lot of cases- unless the applications are capable of making use of multiple cores, or multiple threading (for virtual cores)- from the perspective of running applications you will get identical performance to a 1.5Ghz computer (though you will be able to run more applications on a simultaneous basis).

    It is not like having a 3Ghz machine- despite some ridiculous claims to the contrary........


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    #4
    Overheal
    Registered Users Posts: 81,865 ✭✭✭✭Overheal


    Some applications are begining to take advantage of multiple cores however. Meaning that it will split the load of processing the application between the 2 cores, and in that circumstance, would have perceivably similar processing power to a single core 3ghz processor.

    However as smcarrick says, 99% of applications do not, and so will only run through a single core, at 1.5ghz, rather than 2 or more. All but a handful of video games only run on a single core: bear this in mind when considering system requirements.

    Presumably in the future we'll see 2 types of application: those that run on one core and those that distribute among several. Those single core applications would then be distributed among the cores evenly by the Operating system, so that each core is running as much throughput as every other core, maximizing performance. At the moment, this really doesnt appear to be the case too much. But ive been wrong before.


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    #5
    scully74
    Banned (with Prison Access) Posts: 202 ✭✭scully74


    cheers


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