this post was submitted on 05 Jul 2023
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Steam Deck

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Useful information about SD cards.

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[–] [email protected] 7 points 1 year ago

1 bit of information in flash memory is stored using one cell. Each cells is very similar to a transistor in a processor. We already know that through years of development we can fit 100s of millions of transistors in a very small space - these days they're only a few thousand atoms big. If you look at any chip on a circuit board mostly what you're seeing is the plastic packaging - the actual functional area of the chip (called a die) is much smaller. Even a massive processor like an i7 is only a few millimeters square.

Flash can actually pack in even smaller than a CPU. The structure of cells is much more regular, and they can be packed in 3 dimensions as well rather than just laid out on one flat surface. And that's how you can fit a trillion memory cells into a micro SD card.