SOYO SY-6VBA 133 FSB boot-up frequency and AGP divider JP2 and JP7, Tell CPU its PII, Celeron

SY-6VBA 133 Quick Start Guide

Refer to the following table:

JP9	JP8	tell CPU its	PII, Celeron	PII,PIII	PIII
133/100#	100/66#	FSB Speed	66MHz FSB	100MHz FSB	133MHz FSB

Short		Short	FSB = 66MHz	Normal setting	*Possible higher
					multiplier setting
1	2	1	2

Short		Open	FSB = 100MHz	Normal setting
1	2	1	2
Open		Open	FSB = 133MHz	Normal
				setting
1	2	1	2

*This setting will tell CPU that it is running on 66MHz; this will release more multiplier

settings on some Intel CPUs, but it will make the system operate out of its specifications if the actual FSB frequency is 100MHz higher.

Step 5. FSB boot-up frequency and AGP divider: JP2 and JP7

The settings of JP2 and JP7 determine the FSB frequency at boot-up, and more important, they determine the AGP divider and the group of FSB frequencies that can be selected in the BIOS. Refer to the following table:

JP7		JP2	Boot-up	BIOS FSB	AGP divider
			FSB	group
Short		Short Pin 1-2	66	66~83	1
1	2	1 2	3
Open		Short pin 1-2	100	90~122	1.5
1 2		1 2	3
Open		Short pin 2-3	133	124~155	2.0
1 2		1 2	3

As example, if JP7 is set to open and JP2 to (1-2), the boot-up FSB frequency will be 100MHz. When the BIOS takes control, it will write the BIOS FSB setting to the clock generator. This happens shortly after power-up, and the FSB frequency will then be in accordance to the BIOS setting. The group from which the FSB Frequency can be selected in the BIOS is 90~122MHz and AGP Clock will be 60~81MHz. Note that all FSB Frequencies are available in the BIOS, but that only those in the group as determined by JP2 and JP7 will have effect when selected.

Hardware Installation

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