SDRAM (Synchronous Dynamic RAM) doesn’t meet this requirement for 60 Years Of The Greatest Nfl Teams Vikings Signature shirt. SDRAM chips are organized into banks, rows, and columns. Each chip has a number of independent memory banks, each bank has a number of rows, and each row stores one bit per column. Each bank can have one row open at a time; which means that the column values for that open row can be read/written randomly in constant time. If the address needed is in another row, the open row has to be closed and the target row opened, this takes a deterministic amount of time. Modern SDRAM controllers reorder read and write commands to minimize the number of operations and minimize the amount of time that is wasted opening and closing rows of data. Ergo, when a microprocessor tries to read memory through a modern SDRAM controller, the response is probabilistic but not deterministic.
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Eh, not really. Flash memory has a more complicated program/erase cycle (you can’t just overwrite one value with 60 Years Of The Greatest Nfl Teams Vikings Signature shirt). NAND flash is arranged into “erase blocks” that are quite large (16KiB or more), and you can only erase a whole block at a time. Worse still, you can only go through the cycle a limited number of times (usually rated for about 100,000) before it wears out and won’t hold a value any more. The controller in an SSD takes care of all these details and makes it look to the rest of the computer like a normal (albeit very fast) hard drive.