2-18 Chapter 2: BIOS setup
2.4.2 Chipset
The Chipset menu allows you to change the advanced chipset settings.
Select an item then press <Enter> to display the sub-menu.
Advanced Chipset Settings
WARNING: Setting wrong values in below sections
may cause the system to malfunction.
Congure DRAM Timing by SPD [Enabled]
Performance Acceleration Mode [Auto]
DRAM Idle Timer [Auto]
DRAM Refresh Rate [Auto]
Graphic Adapter Priority [AGP/Int-VGA]
Graphics Aperture Size [64MB]
MPS Revision [1.4]
Configure DRAM Timing by SPD [Enabled]
When this item is enabled, the DRAM timing parameters are set according
to the DRAM SPD (Serial Presence Detect). When disabled, you can
manually set the DRAM timing parameters through the DRAM sub-items.
The following sub-items appear when this item is Disabled.
Conguration options: [Disabled] [Enabled]
DRAM CAS# Latency [2.5 Clocks]
Controls the latency between the SDRAM read command and the time
the data actually becomes available.
Conguration options: [2.0 Clocks] [2.5 Clocks] [3.0 Clocks]
DRAM RAS# Precharge [4 Clocks]
Controls the idle clocks after issuing a precharge command to the DDR
SDRAM. Conguration options: [4 Clocks] [3 Clocks] [2 Clocks]
DRAM RAS# to CAS# Delay [4 Clocks]
Controls the latency between the DDR SDRAM active command and
the read/write command. Conguration options: [4 Clocks] [3 Clocks]
[2 Clocks]
DRAM Precharge Delay [8 Clocks]
Sets the RAS Activate timing to Precharge timing.
Conguration options: [8 Clock] [7 Clocks] [6 Clocks] [5 Clocks]
DRAM Burst Length [8 Clocks]
Sets the DRAM Write Recover Time.
Conguration options: [4 Clocks] [8 Clocks]
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