What does clock speed mean in a dual or quad core CPU?

Osama Javaid September 30, 2012

My processor is a 3.1GHz Core-i3 which is in fact a dual core processor. Does it mean that I have two 3.1GHz processors OR does it mean that I have two 1550MHz processors?

  1. Knut H. Flottorp
    October 20, 2012 at 2:03 am

    It means that the clock frequency used on the CPU chip runs at 3.1GHz - or about 10cm/4" of light distance per cycle. So, this frequency is for the single-chip only.Now you have to look at the cache speed, and the code the cache controller and then the full stop a memory fetch will cause.

    So, if your 4GB of RAM runs at 300MHz, and need 5 cycles to fully load a 32 bit word - 10 cycles to fetch a 64 bit word, this is what will make things go slow. Bear in mind that most numbers you use is small, you are right if your wonder about the benefit of a 64bit processor and 6GB of memory. It may go faster as 32 bit, on a 1GB memory located next to the CPU - the 2 inches away may be a more than a nano-second. The other is how the code is written: Java is interpreted as is VBA, Perl and Python on Mac. It may look good, but if you want it to go fast, it should be compiled, like C and C++.

  2. Alex Perkins
    October 18, 2012 at 10:57 pm

    Both cores run at 3.1 GHz.

  3. dhanunjayarao chunduri
    October 6, 2012 at 2:06 am

    clock speed means speed of a processor.
    on which speed processor do their job.
    if u have 3.1 ghz dual core processor then u have 2 core each core is of 3.1 ghz …

  4. Usman Mubashir
    October 5, 2012 at 6:30 am

    clock speed means the the number of times your processor can process he data in one second.
    check My Computer's properties, there it will show something like this:
    Intel Core i3 CPU @ 3.1 GHz 3.1 GHz

    This shows that both your cores have same speed of 3.1 GHz.

  5. Alex Perkins
    October 3, 2012 at 7:51 pm

    Each core is running at 3.1 GHz

  6. Jacob
    October 3, 2012 at 5:53 am

    It means you have two processors (Dual core) and each processor is capable of running at 3.1 GHz.

  7. Dimal Chandrasiri
    October 2, 2012 at 3:19 pm

    you have two processor cores that are running at 3.1Ghz. dual core means, twice the processing power as a single core CPU. not that, you have a CPU with 6.2Ghz total clock or a CPU with 2 cores that run at 1.5Ghz.

  8. Isaac Elesha
    October 1, 2012 at 10:57 pm

    this is the rate at which the processor completes a particular task.All things been equal,the the clock speed,the faster the processor completes a given task.note that clock speed alone ay not be enough standard to use when comparing two or more processors-the bus speed also comes into play..

  9. Ahmed Khalil
    October 1, 2012 at 1:54 pm

    3.1Ghz is the clock ferquency of the processor and it not devided on the 2 cores.

  10. Nikhil Gupta
    October 1, 2012 at 12:30 pm

    clock speed means speed of a processor.
    on which speed processor do their job.
    if u have 3.1 ghz dual core processor then u have 2 core each core is of 3.1 ghz ....

  11. ha14
    September 30, 2012 at 7:22 pm

    each one is working on 3.1GHZ, the clock speed is per core

  12. Bruce Epper
    September 30, 2012 at 7:18 pm

    The processor clock speed is a chip-level spec not core-level so if your CPU is running at 3.1GHz, each core is running at that speed. (One clock to control them all.)

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