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ARK-6310 User Manual 50
4.5.3.3 Active to Precharge Delay
This item is the minimum delay time between Active and Precharge. Choices: 5, 6, 7.
4.5.3.4 DRAM RAS# to CAS# Delay
This option allows you to insert a delay between the RAS ( Row Address Strobe )
and CAS ( Column Address Strobe ) signals. This delay occurs when the SDRAM is
written to, read from or refreshed. Naturally, reducing the delay improves the perfor-
mance of the SDRAM while increasing it reduces performance. Choices: 2, 3.
4.5.3.5 DRAM RAS# Precharge
This option sets the number of cycles required for the RAS to accumulate its charge
before the SDRAM refreshes. Reducing the precharge time to 2 improves SDRAM
performance but if the precharge time of 2 is insufficient for the installed SDRAM, the
SDRAM may not be refreshed properly and it may fail to retain data
So, for better SDRAM performance, set the
SDRAM RAS Precharge Time to 2 but
increase it to 3 if you face system stability issues after reducing the precharge time.
Choices: 2, 3.
4.5.3.6 DRAM Data Integrity Mode
Select ECC if your memory module supports it. The memory controller will detect and
correct single-bit soft memory errors. The memory controller will also be able to
detect double-bit errors though it will not be able to correct them. This provides
increased data integrity and system stability. Choices: Non-ECC, ECC.
4.5.3.7 MGM Core Frequency
This field sets the frequency of the DRAM memory installed.
Choices: Auto Max 266MHz, 400/266/133/200 MHz, 400/200/100/200 MHz, 400/200/
100/133 MHz, 400/266/133/267 MHz, 533/266/133/200 MHz, 533/266/133/266 MHz,
400/333/166/250 MHz, Auto Max 400/333 MHz,
Auto Max 533/333 MHz.
4.5.3.8 System BIOS Cacheable
This feature is only valid when the system BIOS is shadowed. It enables or disables
the caching of the system BIOS ROM at F0000h-FFFFFh via the L2 cache. This
greatly speeds up accesses to the system BIOS. However, this does not translate
into better system performance because the OS does not need to access the system
BIOS much. Choices are: Disabled, Enabled.
4.5.3.9 Video BIOS Cacheable
This feature is only valid when the video BIOS is shadowed. It enables or disables
the caching of the video BIOS ROM at C0000h-C7FFFh via the L2 cache. This
greatly speeds up accesses to the video BIOS. However, this does not translate into
better system performance because the OS bypasses the BIOS using the graphics
driver to access the video card's hardware directly. Choices: Enabled, Disabled.
4.5.3.10 Memory Hole At 15M-16M
Enabling this feature reserves 15MB to 16MB memory address space to ISA expan-
sion cards that specifically require this setting. This makes the memory from 15MB
and up unavailable to the system. Expansion cards can only access memory up to
16MB. Choices: Enable, Disable.