Pro-Tech EB-471LF M1 Frequency Control Setup Screen, Auto Detect PCI CLK, Spread Spectrum

Chapter 4 Award BIOS Setup

4-10. FREQUENCY CONTROL

Choose 〝FREQUENCY CONTROL〞 from the main menu, a display will be shown on screen as below:

Phoenix - AwardBIOS CMOS Setup Utility

Frequency Control

Auto Detect PCI Clk	[Enabled]	Item Help
Spread Spectrum	[Enabled]
		Menu Level ►
↑↓→←: Move Enter: Select	+/-/PU/PD:Value F10:Save ESC:Exit F1:General Help
F5: Previous Values	F6: Fail-Safe Defaults F7:Optimized Defaults

Frequency Control Setup Screen

This setup menu allows you to specify your settings for frequency control.

AUTO DETECT PCI CLK:

This item allows you to enable or disable auto detect PCI Clock.

SPREAD SPECTRUM:

When the system clock generator pulses, the extreme values of the pulse generate excess EMI. Enabling pulse spectrum spread modulation changes the extreme values from spikes to flat curves, thus reducing EMI. This benefit may in some cases be outweighed by problems with timing- critical devices such as a clock-sensitive SCSI device.

EB-471LF USER′S MANUAL Page: 4-21