A delay in transmitting data between a computer’s RAM
and its processor
. Since RAM is not necessarily fast compared to the computer’s processor, RAM latency can occur, causing a delay between the time a computer’s hardware recognizes the need for a RAM access (initiates a request for data) and the time the data or instruction is available to the processor. If the CPU requests data that is not stored in the cache
, then it will have to wait for the RAM to retrieve the data, opening the door to latency problems.
Also see latency.