ECS 915G-M5, Руководство пользователя, Страница: 41 / 94

35
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.
Phoenix-AwardBIOS CMOS Setup Utility
Advanced Chipset Features
f DRAM Timing Selectable [By SPD]
CAS Latency Time [Auto]
DRAM RAS# to CAS# Delay [Auto]
DRAM RAS# Precharge [Auto]
Precharge delay (sRAS) [Auto]
System Memory Frequency [Auto]
System BIOS Cacheable [Disabled]
Video BIOS Cacheable [Disabled]
PCI Express Root Port Func [Press Enter]
***VGA Setting***
On-Chip Video memory size
[Press Enter]
On-Chip Frame Buffer Size [8M]
Fixed Memory Size [8M]
DVMT Memory Size [128M]
Boot Display [Auto]
f
12
12
12
Item Help
Menu Level
f
: Move Enter: Select +/-/PU/PD:Value F10:Save ESC:Exit F1: General Help
mnlk
F5:Previous Values F6:Fail-Safe Defaults F7:Optimized Defaults
DRAM Timing Selectable (By SPD)
Enables you to select the CAS latency time in HCLKs of 2, 2.5, or 3. The value is set at the
factory depending on the DRAM installed. Do not change the values in this field unless you
change specifications of the installed DRAM or the installed CPU.
X
X
X
X
X
f
X
X
X
•
CAS Latency Time (Auto): This item controls the timing delay (in clock
cycles) before the DRAM starts a read command after receiving it.
•
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
forthe Row Address Strobe (RAS#) signal to accumulate its charge before
the DRAM is refreshed. If insufficient time is allowed, refresh may be incom
plete and data lost.
•
Precharge delay (tRAS): The precharge time is the number of cycles it
takes for DRAM to accummulate charge before refresh.
•
System Memory Frequency (Auto): This item sets the main memory fre
quency. When you use an external graphics card, you can adjust this to
enable the best performance for your system.