Intel I815E user manual Advanced Chipset Features

BIOS SETUP

Advanced Chipset Features

This Setup menu controls the configuration of the chipset.

CMOS Setup Utility – Copyright © 1984-2001 Award Software

Advanced Chipset Features

SDRAM CAS Latency Time	3	ITEM HELP
SDRAM Cycle Time Tras/Trc	Auto	Menu Level
SDRAM RAS-to-CAS Delay	Auto
SDRAM RAS Precharge Time	Auto
System BIOS Cacheable	Disabled
Video BIOS Cacheable	Disabled
CPU Latency Timer	Enabled
Delayed Transaction	Enabled
AGP Graphics Aperture Size	64MB
System Memory Frequency	100Mhz
On-Chip Video Window Size	64MB

SDRAM CAS Latency Time

You can select CAS latency time in HCLKs of 2/2 or 3/3. 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. The choices are 2 and 3.

SDRAM Cycle Time Tras/Trc

The default setting for the SDRAM Cycle Time Tras/Trc is Auto.

SDRAM RAS-to-CAS Delay

You can select RAS to CAS Delay time in HCLKs of 2/2 or 3/3. 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. The choices are Auto, 2 and 3.

SDRAM RAS Precharge Time

This option defines the length of time for Row Address Strobe is allowed to precharge. The choices are Auto, 2 and 3.

System BIOS Cacheable

The setting of Enabled allows caching of the system BIOS ROM at F000h-FFFFFh, resulting in better system performance. However, if any program writes to this memory area, a system error may result.

34 I815E User’s Manual