Datasheet

Chapter 4: BIOS

4-13

Global Activation Throttle

Select Enabled to enable open-loop global thermal throttling on a fully buffered

(FBD) memory module to make it active whenever the number of activation exceeds

a predeﬁ ned number. The options are Enabled and Disabled.

Snoop Filter

Select Enabled to eliminate snoop trafﬁ c to the graphics port to greatly improve

system performance when running graphics-intensive applications. The options are

Enabled and Disabled.

Crystal Beach Features

This feature is intended to work with the Intel I/O AT (Acceleration Technology) to

accelerate the performance of TOE devices. (Note: A TOE device is a specialized,

dedicated processor that is installed on an add-on card or a network card to

handle some or all packet processing of the card. For this motherboard, the TOE

device is built inside the ESB 2 South Bridge chip.) The options are Enabled and

Disabled.

Route Port 80h Cycles to

This feature allows the user to decide which bus to send debug information to. The

options are Disabled, PCI and LPC.

Clock Spectrum Feature

If Enabled, the BIOS will monitor the level of Electromagnetic Interference caused

by the components and will attempt to decrease the interference whenever needed.

The options are Enabled and Disabled.

High Precision Event Time

Select Yes to activate the High Precision Event Timer (HPET), which is capable of

producing periodic interrupts at a much higher frequency than a Real-time Clock

(RTC) can in synchronizing multimedia streams, providing smooth playback and

reducing the dependency on other timestamp calculation devices, such as an x86

RDTSC Instruction embedded in a CPU. The High Precision Event Timer is used

to replace the 8254 Programmable Interval Timer. The options for this feature are

Yes and No.

USB Function

Select Enabled to use USB devices. The settings are Enabled and Disabled.

Legacy USB Support

This setting allows you to enable support for Legacy USB devices. The settings

are Enabled and Disabled.