Asus P5QSEPLUS PCIE Frequency [Auto], Control, DRAM Timing, FSB Frequency, Front Side Bus, DRAM Frequency, CPU External Frequency, 2.4.3DRAM Frequency [Auto]

FSB/CPU External Frequency Synchronization

Front Side Bus	CPU External Frequency
FSB 1600	400 MHz
FSB 1333	333 MHz
FSB 1066	266 MHz
FSB 800	200 MHz

PCIE Frequency [Auto]

Allows you to set the PCI Express frequency. Use the <+> and <-> keys to adjust the PCIE frequency. The values range from 100 to 180.

2.4.2FSB Strap to North Bridge [Auto]

When set to [Auto], the FSB Strap will be adjusted automatically by FSB Frequency and DRAM Frequency. Configuration options: [Auto] [200MHz] [266MHz] [333MHz] [400 MHz]

2.4.3DRAM Frequency [Auto]

Allows you to set the DDR2 operating frequency.

Configuration options: [Auto] [DDR2-533 MHz] [DDR2-639 MHz] [DDR2-667 MHz] [DDR2-709 MHz] [DDR2-800 MHz] [DDR2-852 MHz] [DDR2-887 MHz] [DDR2- 1066 MHz] [DDR2-*1200 MHz*]

The DRAM Frequency configuration options vary with the FSB Frequency item settings.

Selecting a very high DRAM frequency may cause the system to become unstable! If this happens, revert to the default setting.

2.4.4DRAM Timing Control [Auto]

Allows you to set the DRAM timing control. Configuration options: [Auto] [Manual]

•The following sub-items appear only when you set the DRAM Timing

Control item to [Manual].

•The configuration options for some of the following items vary depending on the DIMMs you install on the motherboard.

2-18 Chapter 2: BIOS setup