Partner PT-6212, Руководство по обслуживанию

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14 C H A P T E R 2 B I O S S E T U P
Advanced Chipset Features
This option displays critical timing parameters of the mainboard. Leave the items on this menu at their default
settings unless you are very familiar with the technical specifications of the system hardware. If you change
the values incorrectly, you may introduce fatal errors or recurring instability into the system.
Advanced Figure 2.7
Chipset Features menu
Phoenix - AwardBIOS CMOS Setup Utility
Advanced Chipset Features
DRAM Timing Selectable [By SPD]
CAS Latency Time 2 x
DRAM RAS# to CAS# Delay 3 x
DRAM RAS# Precharge 3 x
Precharge dealy (tRAS) 9 x
System Memory Frequency 400MHz x
System BIOS Cacheable [Enabled]
Video BIOS Cacheable [Enabled]
** VGA Setting **
On-Chip Frame Buffer Size [8MB]
Boot Display [CRT+LFP(LVDS)]
Panel Type [1024 x 768 24]
Item Help
↑↓→←:Move Enter:Select +/-/PU/PD:Value F10:Save ESC:Exit F1:General Help
F5:Previous Values F6:Fail-Safe Defaults F7:Optimized Defaults
DRAM Timing Selectable
Set this to the default value to enable the system to automatically set the SDRAM timing by SPD (Serial
Presence Detect). SPD is an EEPROM chip on the DIMM module that stores information about the memory
chips it contains, including size, speed, voltage, row and column addresses, and manufacturer.
CAS Latency Time
When the
DRAM Timing Selectable
is set to [Manual], this field is adjustable. When synchronous DRAM is
installed, the number of clock cycles of CAS latency depends on the DRAM timing.
DRAM RAS# to CAS# Delay
When the
DRAM Timing Selectable
is set to [Manual], this field is adjustable. 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. Fast gives faster performance; and Slow gives more stable performance. This field applies only
when synchronous DRAM is installed in the system.
DRAM RAS# Precharge
When the DRAM Timing Selectable is set to [Manual], this field is adjustable. This setting controls the
number of cycles for Row Address Strobe (RAS) to be allowed to precharge. If insufficient time is allowed
for the RAS to accumulate its charge before DRAM refresh, refresh may be incomplete and DRAM may fail
to retain data. This item applies only when synchronous DRAM is installed in the system.
Precharge dealy (tRAS)
When the
DRAM Timing Selectable
is set to [Manual], this field is adjustable. This item controls the number
of cycles for Row Address Strobe (RAS) to be allowed to precharge. If insufficient time is allowed for the
RAS to accumulate its charge before DRAM refresh, refresh may be incomplete and DRAM may fail to retain
data. This item applies only when synchronous DRAM is installed in the system.
System Memory Frequency
When the DRAM Timing Selectable is set to [Manual], this field is adjustable. This item allows you select the
memory frequency.