ECS 845PE-A800, Manual, Page: 37 / 70

31
Using BIOS
Advanced Chipset Features
These items define critical timing parameters of the motherboard. You should leave the
items on this page at their default values unless you are very familiar with the technical
specifications of your system hardware. If you change the values incorrectly, you may
introduce fatal errors or recurring instability into your system.
DRAM Timing Selectable [Manual]
CAS Latency Time [2.5]
Active to Precharge Delay [7]
DRAM RAS# to CAS# Delay [3]
DRAM RAS# Precharge [3]
Turbo Mode [Disabled]
Command Pre Clock [Auto]
Memory Frequency For [PC133]
System BIOS Cacheable [Disabled]
Video BIOS Cacheable [Disabled]
Delayed Transaction [Enabled]
AGP Aperture Size (MB) [128MB]
On-chip Video Windows Size [128MB]
On-chip Frame Buffer Size [8M]
Boot Display [Atuo]
Phoenix-AwardBIOS CMOS Setup Utility
Advanced Chipset Feature
Item Help
Menu Level
f
DRAM Timing Selectable (Manual)
The value in this field depends on performance parameters of the installed memory chips
(DRAM). Do not change the value from the factory setting unless you install new memory
that has a different performance rating than the original DRAMs.
CAS Latency Time (2.5)
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.
Active to Precharge Delay (7)
The precharge time is the number of cycles it takes for DRAM to accumulate its charge
before refresh.
DRAM RAS# to CAS# Delay (3)
This field allows you insert a timing delay between the CAS and RAS strobe signals, used
when DRAM is written to, read from, or refreshed. Disabled gives faster performance; and
Enabled gives more stable performance.
DRAM RAS# Precharge (3)
Select the number of CPU clocks allocated for the Row Address Strobe (RAS#) signal to
accumulate its charge before the DRAM is refreshed. If insufficient time is allowed, refresh
may be incomplete and data lost.
Turbo Mode (Disabled)
This item allows you to speed up the external clock by approximately 2.5%. This feature
is used to verify the design flexibility. It is a very important tool for test units to verify
CPU stability.
Command Pre Clock (Auto)
Leave this item at Auto to enhance the system performance.
: Move Enter: Select +/-/PU/PD:Value F10:Save ESC:Exit F1: General Help
mnlk
F5:Previous Values F6:Fail-Safe Defaults F7:Optimized Defaults