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BIOS SETUP
MB820 User’s Manual 37
Memory Frequency For
This field sets the frequency of the DRAM memory installed. The default
setting is Auto. The other settings are DDR266, DDR333, DDR320 and
DDR400.
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.
Video BIOS Cacheable
The Setting Enabled allows caching of the video BIOS ROM at
C0000h-F7FFFh, resulting in better video performance. However, if any
program writes to this memory area, a system error may result.
Memory Hole At 15M-16M
In order to improve performance, certain space in memory can be reserved
for ISA cards. This memory must be mapped into the memory space
below 16 MB. The choices are Enabled and Disabled.
Delay Prior to Thermal
This field activates the CPU thermal function after the systems boots for
the set number of minutes. The options are 16Min and 64Min.
AGP Aperture Size
The field sets aperture size of the graphics. The aperture is a portion of the
PCI memory address range dedicated for graphics memory address space.
Host cycles that hit the aperture range are forwarded to the AGP without
any translation. The default setting is 128M.
Init Display First
This field allows the system to initialize first the VGA on chip or the
display card on the PCI Slot.
DRAM Data Integrity Mode
This BIOS feature controls the ECC feature of the memory controller.
ECC, which stands for Error Checking and Correction, enables the
memory controller to detect and correct single-bit soft memory errors.
The memory controller will also be able to detect double-bit errors
although it will not be able to correct them. This provides increased data
integrity and system stability. However, this feature can only be enabled if
you are using special ECC memory modules.