Computer Science / Unit 5 CS 0259 short lesson, about 20 seconds
Main Memory: DRAM
Captions available
The idea
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.
In practice
A machine advertising thirty-two gigabytes is claiming roughly thirty-two billion capacitor-backed bytes.
Where people slip
The charge fades; the hardware re-pours it constantly.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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