Asus P4P800-VM 2.4.2 Chipset, DDR Reference Voltage [Auto], DRAM Frequency [Auto], Configure DRAM Timing by SPD [Enabled], DRAM CAS# Latency [2.5 Clocks]

2.4.2 Chipset

The Chipset menu items allow 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 the sections below may cause system to malfunction.

DDR Reference Voltage	[Auto]
DRAM Frequency	[Auto]
Configure DRAM Timing by SPD	[Enabled]
Graphic Adapter Priority	[AGP/Int. VGA]
Onboard Video Memory	[Enabled, 8MB]
Graphics Aperture Size	[ 64 MB]
Spread Spectrum	[Enabled]
Boot Display Device	[Auto]
Flat Panel Type	[640x480 LVDS]
TV Standard	[Auto]
MPS Revision	[1.4]

Set the CPU external frequency for next boot.

Select Screen

Select Item

+- Change Option

F1 General Help

F10 Save and Exit

ESC Exit

DDR Reference Voltage [Auto]

Controls the DDR SDRAM operating voltage. Configuration options: [Auto] [2.55V] [2.65V]

DRAM Frequency [Auto]

Allows you to set the DDR operating frequency. 6Configuration options: [266 MHz] [333 MHz] [400 MHz] [Auto]

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. Configuration options:

[Disabled] [Enabled]

The following sub-items appear when the item Configure DRAM Timing by SPD is set to Disabled.

DRAM CAS# Latency [2.5 Clocks]

This item controls the latency between the SDRAM read command and the time the data actually becomes available. Configuration options: [2.0 Clocks] [2.5 Clocks] [3.0 Clocks]

DRAM RAS# Precharge [4 Clocks]

This item controls the idle clocks after issuing a precharge command to the DDR SDRAM. Configuration options: [4 Clocks] [3 Clocks]

[2 Clocks]

2-16 Chapter 2: BIOS information