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3: Random Access Memory (RAM)

  • Page ID
    432676
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    Random Access Memory (RAM) is volatile quick access memory. You could say there are three types of memory; cache, primary (RAM) and secondary (hard drive). An analogy could be made to studying.  The cache are the books on your desk that you are currently using.  The RAM is the books on your bookshelf that you have instant access to. The hard drive are like the books in the library, that you have to go and get before you can use.  The cache and RAM memory are volatile and you do not preserve the data in them when you shut down the computer (each semester you use a new set of textbooks), while the hard drive is non-volatile and preserves data when you shut down the computer. 

     

    clipboard_eaaa38961173599f3f9a0d770318ed931.pngFigure \(\PageIndex{1}\): Random Access Memory chip on a Pi 4 B. (Belford cc 0.0)
    • 1,2,4,8 GB options
      • LPDDR4 SDRAM
        • Low-Power Double Data Rate Synchronous Dynamic Random Access Memory
        • Transfers data on rise and fall of clock signal
      • 2400 MHz

     

    Memory Functions

    Information on Memory

    cat /proc/meminfo
    

    Free memory

    free -h
    

     


    This page titled 3: Random Access Memory (RAM) is shared under a not declared license and was authored, remixed, and/or curated by Robert Belford.

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