Primary storage


Martin McBride, 2017-03-03
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Primary storage is the fastest type of storage in the computer. It includes the system RAM (Random Access Memory), and also the ROM (Read Only Memory) which contains the code needed to boot the system.

Primary storage is accessed directly by the CPU bus, which makes it very fast - it only takes a few clock cycles to access data. However it is relatively expensive compared to hard drive storage, so most computers use a combination of both.

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