ESM-2740/2743
56 ESM-2740/2743 User’s Manual
3.5.3.3 Active
to
Precharge Delay
This item is the minimum delay time between Active and Precharge.
The Choices: 5, 6, 7.
3.5.3.4 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 performance of the SDRAM
while increasing it reduces performance.
The Choices: 2, 3.
3.5.3.5 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.
The Choices: 2, 3.
3.5.3.6 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.
The choices: ECC, Non ECC.
3.5.3.7 MGM Core Frequency
This field sets the frequency of the DRAM memory installed.
The 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, 533/333/166/266 MHz, 400/333/166/250 MHz,
Auto Max 400/333 MHz, Auto Max 533/333.
3.5.3.8 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.
The Choice: Disabled, Enabled.
Summary of Contents for ESM-2740
Page 22: ...ESM 2740 2743 22 ESM 2740 2743 User s Manual 2 Hardware Configuration...
Page 23: ...User s Manual ESM 2740 2743 User s Manual 23 2 1 Product Overview...
Page 79: ...User s Manual ESM 2740 2743 User s Manual 79 5 Measurement Drawing...
Page 80: ...ESM 2740 2743 80 ESM 2740 2743 User s Manual...
Page 82: ...ESM 2740 2743 82 ESM 2740 2743 User s Manual Appendix B AWARD BIOS POST Messages...
