User Guide

Hardware Installation
2-4
2.2 Jumpers
With the help of VID signal and SMbus, this motherboard is jumper-less design.
2.2.1 Selecting the CPU Frequency
Celeron PPGA VID signal and SMbus clock generator provide CPU voltage
auto-detection and allow user to set CPU frequency through CMOS setup, no
jumper or switch is needed. The correct CPU information is saved into
EEPROM, with these technologies, the disadvantages of Pentium base
jumper-less design are eliminated. There will be no worry of wrong CPU
voltage detection and no need to re-open the housing if CMOS battery loss.
The CPU frequency selection is set by going into:
BOIS Setup Æ Chipset Features Setup Æ CPU Clock Frequency
(The possible setting is 66.8, 75, 83.3, 100, 103, 105, 110, 112, 120, 124, 133,
140, 150 MHz)
BOIS Setup Æ Chipset Features Setup Æ CPU Clock Ratio
(The possible setting is 1.5x, 2x, 2.5x, 3x, 3.5x, 4x, 4.5x, 5x, 5.5x, 6x, 6.5x, 7x,
7.5x, and 8x)
Core frequency = Ratio * External bus clock
INTEL Celeron PPGA CPU Core Frequency Ratio External Bus Clock
Celeron PPGA 300A 300MHz= 4.5x 66MHz
Celeron PPGA 333 333MHz= 5x 66MHz
Celeron PPGA 350 350MHz= 3.5x 100MHz
Celeron PPGA 366 366MHz= 5.5x 66MHz
Celeron PPGA 400 400MHz= 6x 66MHz
Celeron PPGA 433 433MHz= 6.5x 66MHz
Warning: INTEL 440ZX chipset supports maximum 100MHz FSB
clock, the higher clock settings are for internal test only. These
settings exceed the specification of ZX chipset, which may
cause serious system damage.