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Memory refers to the physical devices used to store programs or data on a temporary or permanent basis for use in a computer or other digital electronic device.

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in one nanosecond*. If a CPU is operating at 3GHz, then that implies a distance of 4" per clock cycle. This is a hard physical limit on memory access speeds. This is a large part of why being close … to CPU (as L1 cache is), allows memory to be faster. EDIT *actually how far light can travel in a vacuum, the distance through copper/silicon is less. …
answered Mar 31 '14 by Matthew Finlay