Asus PU-DLS PU-DLS User Manual - Page 75

4.4.1 Chip Configuration SDRAM Configuration [By SPD] This parameter allows you to set the optimal timings for items 2-5, depending on the memory modules that you are using. The default setting is [By SPD], which configures items 2-5 by reading the contents in the SPD (Serial Presence Detect) device. The EEPROM on the memory module stores critical information about the module, such as memory type, size, speed, voltage interface, and module banks. Configuration options: [User Defined] [By SPD] The SDRAM parameters (items 2~5) become configurable only when you set the SDRAM Configuration to [User Defined]. SDRAM CAS Latency [2.5T] This item controls the latency between the SDRAM read command and the time the data actually becomes available. It is recommended to keep the default setting for stable system operation. SDRAM RAS to CAS Delay [3T] This item controls the latency between the DDR SDRAM active command and the read/write command. It is recommended to keep the default setting for stable system operation. ASUS PU-DLS motherboard user guide 4-17