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Chapter 4: BIOS Setup
NOTE! The following 4 SDRAM parameters appear only when you set
the SDRAM Configuration to [User Defined].
SDRAM CAS Latency [3T]
This item controls the latency between the SDRAM read command and the
time the data actually becomes available.
SDRAM RAS Precharge Time [3T]
This item controls the idle clocks after issuing a precharge command to the
SDRAM.
SDRAM RAS to CAS Delay [3T]
This item controls the latency between the SDRAM active command and the
read/write command.
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]
(Scroll down to view all items on the menu.)