What is the relationship between CPU speed and the capacity of the memory (RAM)?

Abongeh C September 13, 2013
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For example, if the speed of the CPU is 2.66GHz, what will be the minimum and the maximum capacity of RAM required for the optimum functioning of the system?

  1. Oron J
    September 14, 2013 at 9:16 am

    As others have pointed out, there's not relationship at all between CPU speed and amount of RAM. That said, there are some limitations. The most important is your motherboard's design. Some motherboards are limited to a maximum of 4GB, some to 8 GB, and some older ones "max out" at 2GB, so check your motherboard's manual. Also, if you have a 32 bit processor, then you can use up to 4GB of which only about 3.2 GB will be recognised by Windows. To use more than that, you would have to use a 64 bit CPU and a 64 bit version of Windows.

  2. Jan F
    September 13, 2013 at 10:14 pm

    There is no relation between the CPUs clock speed and the amount of RAM.

    There only used to be a relation between the CPUs bus speed and the RAMs clock speed. However, with manufacturers having moved from the front-side bus communication to other technologies like HyperTransport or QuickPath Interconnect (both Intel) going into that detail is obsolete.

    Basically all you have to check are the modules supported by your CPU and motherboard.

  3. Hovsep A
    September 13, 2013 at 9:15 pm

    the minimum and maximum ram is related to your Linux system as well on motheboard and cpu
    https://help.ubuntu.com/community/32bit_and_64bit#Memory
    Ubuntu 4 GB max for 32 bit version , 64 GB on 32-bit PAE and 128 GB on 64 bit (theoretically the cap is much higher for 64 bit).
    Ubuntu 64 Bit - 2^64 RAM!!!
    http://en.wikipedia.org/wiki/Physical_Address_Extension
    for instance:
    Your CPU Maximum Supported Memory - 16GB
    Your Motherboard Maximum Supported Memory - 64GB
    Your Maximum Supported Memory - 16GB (which is the lowest value between the Motherboard and CPU)

    another example
    Your CPU Maximum Supported Memory - 16GB
    Your Motherboard Maximum Supported Memory - 8GB
    Your Maximum Supported Memory - 8GB (which is the lowest value between the CPU and Motherboard)

  4. Matt S
    September 13, 2013 at 7:52 pm

    There's no relationship between CPU speed and the RAM capacity you need. The amount of RAM you need will depend on the operating system you run and the programs you use. Most computers are good with 4GB of starts, 8GB for running serious apps.