User's Manual

25 BIOS SETUP
• SDRAM RAS-to-CAS Delay
This controls the latency between SDRAM active command and the read/write command.
Leave on default setting.
• SDRAM RAS Precharge Time
This controls the idle clocks after issuing a precharge command to SDRAM. Leave on de-
fault setting.
• SDRAM CAS Latency Time
This controls the SDRAM performance, default is 3 clocks. If your SDRAM DIMM specifica-
tion is 2 CAS latency, change 3 to 2 for better performance.
• SDRAM Precharge Control
This option is to determine the number of clocks required to deassert RAS and the timing for
SDRAM to do precharge before next RAS can be issued.
• DRAM Data Integrity Mode
NON-ECC : Disable Error Correct Check function.
ECC : Enable Error Correct Check Function.
• System BIOS Cacheable
Selecting “Enabled” allows caching of the system BIOS. This action can increase system
performance.
• Video BIOS Cacheable
Selecting “Enabled” allows caching of the video BIOS. This action can increase system per-
formance.
• Video RAM Cacheable
Selecting “Enabled” allows caching of the video RAM, which results in better system perfor-
mance. However, if any program writes to this memory area, a system error may occur.
• 8 Bit I/O Recovery Time
Recovery time is needed for old 8-bit ISA cards. Default setting is 1 ISA clock. If you find any
unstable 8-bit ISA card, you may try to extend the I/O recovery time.
• 16 Bit I/O Recovery Time
Recovery time is needed for 16-bit ISA cards. Default setting is 1 ISA clock. If you find any
unstable 16-bit ISA cards, you may try to extend the I/O recovery time.