Abit AB-BF6, Manual

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Introduction of the BIOS 3-21
User’s Manual
SDRAM RAS Precharge Time:
Two options are available: 2 and 3. The precharge time is the number of cycles it takes for
the RAS to accumulate its charge before DRAM refreshs. If insufficient time is allowed,
refresh maybe incomplete and the DRAM may fail to retain data. This field applies only if
synchronous DRAM is installed in the system.
SDRAM CAS Latency Time:
Two options are available: 2 and 3. The default setting is 3 . You can select SDRAM CAS
(Column Address Strobe) latency time according your SDRAM specification.
SDRAM Precharge Control:
This option determines the action taken when a page missing occurs (SDRAM only). When
select Disabled, means SDRAM issue precharge on all command, and gives more stable
performance.
DRAM Data Integrity Mode:
Two options are available: Non-ECC or ECC. This option is used to configure the type of
DRAM in your system. ECC is Error Checking and Correction, when your memory is ECC
memory, choose the ECC option.
System BIOS Cacheable:
You can select Enabled or Disabled. The default setting is Enabled . When you select
Enabled allows caching of the system BIOS ROM at F0000h-FFFFFh, resulting in better
system performance. However, if any program writes to this memory area, a system error
may result.
Video BIOS Cacheable:
You can select Enabled or Disabled. The default setting is Enabled . When you select
Enabled allows caching of the video BIOS, resulting in better system performance.
However, if any program writes to this memory area, a system error may result.