Why Do I Have 4 RAM Slots?

A computer’s memory is important for storing data temporarily, for running programs, and for allowing the computer to access files. A computer has two basic types of memory: random access memory (RAM) and read-only memory (ROM).

RAM is where the computer stores data that it can access quickly. Programs and data that a user wants to keep open often stay in RAM.

RAM also helps the computer run faster because it can hold more information at once.

ROM stores data that the computer needs to start up, such as the operating system (OS) and the software that users have installed. The OS contains instructions that tell the computer how to start up and work.

ROM also stores user preferences, such as which applications to open when the computer starts up.

Most computers have four RAM slots because that’s how many bytes (units of information) a standard SIMM can hold. A byte is 8 bits, so a SIMM can hold up to 4 gigabytes (GB) of data.

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