MATSONIC MS9007C, Руководство пользователя

Страница: 55 / 78

49
DRAM Timing Selectable (By 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: (3)
When synchronous DRAM is installed, the number of clock cy-
cles 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 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 (3)
Select the number of CPU clocks allocated for the Row Ad-
dress Strobe (RAS#) signal to accumulate its charge before
the DRAM is refreshed. If insufficient time is allowed, refresh
may be incomplete and data lost.
DRAM Data Integrity Mode (Non-ECC)
Select Parity or ECC (error-correcting code), according to the
type of installed DRAM.
Memory Frequency For (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.