Why does RAM memory disappear when power switches off, but HD/SSD memory stays intact regardless of power status?
In: Technology
RAM is what is called “dynamic” memory while the other kinds you mention are considered “static” memory. RAM trades being volatile (losing contents if you turn it off) for speed, cost and size. It also helps when memory bloat starts making programs act up to have the memory wipe with a restart.
Static RAM used to be much more a thing back in the 80s or so. But it’s not really necessary to keep the contents of RAM typically, while an SSD or HDD are specifically designed to keep contents.
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