Computer Science / CS 0259 · Atom · ~20 seconds
Main Memory: DRAM
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Dynamic RAM builds main memory from capacitors — charge held means 1, absent means 0 — larger and cheaper than cache, volatile, and leaky enough to need continual refresh.
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A machine advertising thirty-two gigabytes is claiming roughly thirty-two billion capacitor-backed bytes.
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The charge fades; the hardware re-pours it constantly.