DRAM - What is POST?

POST (Power On Self Test) occurs as the computer is turned on. The BIOS checks each necessary component is responding and reads info for access timings. In the case of memory modules, it will read the SPD (Serial Presence Detect) to check compatibility and access timings. If the wrong type of memory is installed or if the memory has become faulty - there may be a POST error reported, sometimes with beeps.

 

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