Advanced Chipset Features - ECS PF4 Extreme User Manual

3.3-3 Advanced Chipset Features

These items define critical timing parameters of the mainboard. 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, this may cause fatal errors or
instability into your system.
Phoenix-AwardBIOS CMOS Setup Utility
DRAM Timing Selectable
CAS Latency Time
DRAM RAS# to CAS# Delay [Auto]
DRAM RAS# Precharge
System BIOS Cacheable
Video BIOS Cacheable
PCI Express Root Port Func [Press Enter]
DDR Voltage
: Move Enter: Select
F5:Previous Values
DRAM Timing Selectable [By SPD]
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.
3-8

Advanced Chipset Features

[By SPD]
Item Help
[Auto]
Menu Level
[Auto]
[Disabled]
[Disabled]
[1.80V]
+/-/PU/PD:Value F10:Save ESC:Exit F1: General Help
F6:Fail-Safe Defaults F7:Optimized Defaults
CAS Latency Time [Auto]
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 [Auto]
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. Disabled gives faster performance;
and Enabled gives more stable performance.
DRAM RAS# Precharge [Auto]
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.
System BIOS Cacheable [Disabled]
This item allows the system to be cached in memory for faster execution. Enable this
item for better performance.
Video BIOS Cacheable [Disabled]
This item allows the video BIOS to be cached in memory for faster execution. Enable
these items for better performance.