Term of the Moment

ASCIIbetical


Look Up Another Term


Definition: SPD


(Serial Presence Detect) The method used by DIMM memory modules to communicate their capacity and features to the computer. Data such as manufacturer, size, speed, voltage and row and column addresses are stored in an EEPROM chip on the module. Two pins are used to transmit the data in serial, in contrast to the earlier parallel method (PPD), in which each pin represented one bit. See PPD.