Intel IB868 user manual Advanced Chipset Features, Dram Timing Selectable, CAS Latency Time

BIOS SETUP

Advanced Chipset Features

This Setup menu controls the configuration of the chipset.

Phoenix - AwardBIOS CMOS Setup Utility

Advanced Chipset Features

DRAM Timing Selectable	By SPD	ITEM HELP
CAS Latency Time	4	Menu Level >
DRAM RAS# to CAS# Delay	4
DRAM RAS# Precharge	4
Precharge delay (tRAS)	12
System Memory Frequency	533MHZ
SLP_S4# Assertion Width	1 to 2 Sec
System BIOS Cacheable	Enabled
Video BIOS Cacheable	Disabled
Memory Hole at 15M-16M	Disabled
PCI Express Root Port Func	Press Enter
** On-Chip VGA Setting **
PEG/On Chip VGA Control	Auto
On-Chip Frame Buffer Size	8MB
DVMT Mode	DVMT
DVMT/FIXED memory Size	128MB
Boot Display	CRT+LVDS
Panel Scaling	Auto
Panel Number	1024x768 18 bit SC
Onboard PCU-E LAN	Enable

DRAM Timing Selectable

This option refers to the method by which the DRAM timing is selected. The default is By SPD.

CAS Latency Time

You can configure CAS latency time in HCLKs as 2 or 2.5 or 3. The system board designer should set the values in this field, depending on the DRAM installed. Do not change the values in this field unless you change specifications of the installed DRAM or the installed CPU.

DRAM RAS# to CAS# Delay

This option allows you to insert a delay between the RAS (Row Address Strobe) and CAS (Column Address Strobe) signals. This delay occurs when the SDRAM is written to, read from or refreshed. Reducing the delay improves the performance of the SDRAM.

30 IB868 User’s Manual