Arista AP-3500, Руководство пользователя

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23
Advanced Chipset Features
Since the features in this section are related to the chipset on the CPU board and are completely
optimized, you are not recommended to change the default settings in this setup table unless you
are well oriented with the chipset features.
DRAM Timing Selectable (By SPD)
The value in this feild 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 (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 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 (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.
Precharge Delay (tRAS) (Auto): The precharge time is the number of cycles it
takes for DRAM to accumulate its charge before refresh.
System Memory Frequency (Auto): This item sets the main memory frequency.
When you use an external graphics card, you can adjust this to enable the best
performance for your system.
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Phoenix-AwardBIOS CMOS Setup Utility
Advanced Chipset Features


Menu Level
 
: Move
DRAM Timing Selectable [By SPD]
CAS Latency Time [Auto]
DRAM RAS# to CAS# Delay [Auto]
DRAM RAS# Precharge [Auto]
Precharge delay (tRAS) [Auto]
System Memory Frequency [Auto]
SLP_S4# Assertion Width [4 to 5 Sec.]
System BIOS Cacheable [Enabled]
Video BIOS Cacheable [Disabled]
Memory Hole At 15M-16M [Disabled]
PCI Express Root Port Func [Press Enter]
** VGA Setting **
On-Chip Frame Buffer Size [8MB]
DVMT Mode [DVMT]
DVMT/FIXED Memory Size [128MB]
Boot Display [Auto]
Item Help
Enter: Select
F10: Save ESC: Exit F1: General Help
F5: Previous Values
F6: Fail-Safe Defaults F7: Optimized Defaults
+/-/PU/PD: Value
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x
x
x
x