RAM memories

RAM memories

1. The first RAM memory was invented in 1947 by John von Neumann. He called it a "carousel"; he later called it "random access memory" as well.

   • The history of RAM Memory begins between the years 1949 and 1952, when some of the first types of RAM with a magnetic core began to be developed and used.
     • In the 60s, RAM memories based on semiconductor chips would arrive, created by Intel, such as its 3101 chip. The following year, Intel would present DRAM, a new design that it used for the 1103
       • In 1973 another innovation would arrive that allowed to miniaturize the DRAM chips and. This is the multiplexing of memory addresses. Something that MOSTEK launched with its MK4096.
         • By the end of the 70s, these types of chips were used by most of the computers of the time, both in SIPP format, and later in SIMM, and DIMM/SODIMM, as we know them today.
           • Dynamic RAM (DRAM) It was used from the early 70's to the 90's.
             • It began to be used in 1990, we can still find it today in some devices
               • Synchronous Dynamic RAM (SDRAM): Since 1993 until now it is used in PCs and consoles
                 • Single Data Rate Synchronous Dynamic RAM (SDR SDRAM): second generation of SDRAM, it began to be used in 1993 and continues today
                   • Double Data Rate Synchronous Dynamic RAM (DDR SDRAM):This is the type of standard RAM since the year 2000, being the basis for the following generations: DDR2, DDR4 and DDR5
                     • Graphics Double Data Rate Synchronous Dynamic RAM (GDDR SDRAM): designed for video rendering in conjunction with a GPU on a graphics card, the latest versions are GDDR6 and GDDR6X
                       • RAM High Bandwidth Memory (HBM): created by AMD and SK Hynix, with Samsung currently replacing AMD, it is characterized by the enormous number of memory channels it supports, up to 8 different ones
                         • DDR4 SDRAM came to market in Q2 2014, focusing on ECC memory, while non-ECC DDR4 modules became available in Q3 2014, accompanying the release of Haswell-E processors that require DDR4 memory.
                           • DDR5 memory was first announced in 2012. but it hasn't come out until 2021

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