SPD (Serial Presence Detect):
The timing values listed as SPD settings are the values programmed into the Memory Module's SPD. The EEPROM (Electrically Erasable Programmable Read Only Memory) chip on a DIMM module are used for storing Memory chip Specifications, including Capacity, Speed, Voltage, Row and Column Addresses Strobe (RAS & CAS) plus Manufacturer. SPD timimg values are read by system's Bios as default settings for Memory Settings.
Thinking about reprogramming Manufacturer's default SPD values? Don't!
How to read SPD Settings:
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