User`s guide

Chapter 3: BIOS Setup Utility

DRAM CAS# Latency

This item determines the operation of SDRAM memory CAS (column address

strobe). It is recommended that you leave this item at the default value. The 2T

setting requires faster memory that specifically supports this mode.

DRAM Bank Interleave

Enable this item to increase DRAM memory speed. When enabled, separate

memory banks are set for odd and even addresses and the next byte of memory

can be accessed while the current byte is being refreshed.

Auto detect DIMM/PCI Clock

When this item is enabled, BIOS will disable the clock signal of free DIMM/PCI

slots.

Spread Spectrum

If you enable spread spectrum, it can significantly reduce the EMI (Electro-

Magnetic Interference) generated by the system.

Hyper Threading Function

You can set “Disabled” or “Enabled” to control HT CPU support in O.S. Set

“Enabled” to test HT CPU function.

Max CPUID Value Limit

When this item is enabled, you can use Prescott CPU and LGA-775 CPU and

there will be a normal NT4.0 installation; otherwise, the automatically restarting

will occur while installing.

Execute Disable Bit

It allows the processor to classify areas in memory by where application code

can execute and where it cannot. When a malicious worm attempts to insert code

in the buffer, the processor disables code execution, preventing damage or worm

propagation. Replacing older computers with Execute Disable Bit-enabled

systems can halt worm attacks, reducing the need for virus related repairs.

DRAM Driving

When this item is defaulted at “Normal”, some DDRs might cause the problem

of booting or system stability; in that case, please set it at “High”.