SPDShort for serial presence detect, a category of information that is stored in an EEPROM chip on a memory module and communicated to the BIOS when the computer is booted. The SPD tells the BIOS the module��s data, such as its size, data width, manufacturer, speed, row and column addresses and voltage. With the information the BIOS can configure the memory controller to maximize performance and to reduce the chances of performance failures.
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