Asus CUBX-E, CUBX-L 4.4.1Chip Configuration, SETUP BIOS, DRAM Idle Timer, SDRAM CAS Latency, SDRAM RAS to CAS Delay, SDRAM RAS Precharge Time, SDRAM Configuration [By SPD]

4.BIOS SETUP

4.4.1Chip Configuration

SETUP BIOS .4

Configuration Chip

(Scroll down to see more items as shown.)

SDRAM Configuration [By SPD]

This sets 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) de- vice. The EEPROM on the memory module stores critical parameter information about the module, such as memory type, size, speed, voltage inter- face, and module banks. Configuration options: [User Define] [7ns (143MHz)] [8ns (125MHz)] [By SPD]

SDRAM CAS Latency

This controls the latency between the SDRAM read command and the time that the data actually becomes available. NOTE: To make changes to this field, the SDRAM Configuration field must be set to [User Define].

SDRAM RAS to CAS Delay

This controls the latency between the SDRAM active command and the read/write command. NOTE: To make changes to this field, the SDRAM Configuration field must be set to [User Define].

SDRAM RAS Precharge Time

This controls the idle clocks after issuing a precharge command to the SDRAM. NOTE: To make changes to this field, the SDRAM Configuration field must be set to [User Define].

DRAM Idle Timer

This controls the amount of time in HCLKs that the DRAM controller waits to close a DRAM page after the CPU becomes idle. Leave on default set- ting. NOTE: To make changes to this field, the SDRAM Configuration field must be set to [User Define].

58 ASUS CUBX-L\CUBX-E User’s Manual