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Lanner electronics MB-X71 Series Manual page 38

Socket 478 network security appliance control board ( 2xgbe, 4x10/100 lans )

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AWARD BIOS SETUP
SDRAM Cycle Length : This item allows you to select the SDRAM cycle length. The
settings are 2 or 3.
CAS latency Time: When synchronous DRAM is installed, the number of clock cycles
of CAS latency depends on the DRAM timing. Do not reset this field from the default value
specified by the system designer.
DRAM RAS# to CAS# Delay: This field lets you insert a timing delay between the CAS
and RAS strobe signals, used when DRAM is written to, read from, or refreshed. Fast
gives faster performance. This field applies only when synchronous DRAM is installed in
the system.
DRAM RAS# Precharge Time: If an insufficient number of cycles is allowed for the
RAS to accumulate its charge before DRAM refresh, the refresh may be incomplete and
the DRAM may fail to retain data. Fast gives faster performance; and Slow gives more
stable performance. This field applies only when synchronous DRAM is installed in the
system.
System BIOS Cacheable : Selecting "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. The settings are "Enabled" and
"Disabled".
Video BIOS Cacheable: Selecting Enabled allows caching of the video BIOS ROM at
C0000h to C7FFFh, resulting in better video performance. However, if any program
writes to this memory area, a system error may result.
Memory Hole At 15M-16M: You can reserve this area of system memory for ISA adapter
ROM. When this area is reserved, it cannot be cached. The user information of
peripherals that need to use this area of system memory usually discusses their memory
requirements.
AGP Aperture Size : Select the size of the Accelerated Graphics Port (AGP) aperture.
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.
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