SOYO SY-7VBA 133 Quick Start Manual page 10

SY-7VBA 133 Quick Start Guide
CPU AJ33 and AJ31 Settings: JP6, JP7, CJ1 and CJ2
Step 5.
For certain Intel CPUs, the multiplier is not locked such that setting a multiplier higher than
specified on the CPU is possible. For technical details read the following:
Your PII /III 100/66 MHz FSB CPU has a pin AJ33 (100/66# signal) to tell it what FSB
frequency the CPU requires; The PIII 133 MHz FSB CPU has two pins AJ33and AJ31
(133/100# signal). JP6 and JP7 are connected to the AJ33 and AJ31 input respectively and
are used to tell the motherboard what the CPU FSB frequency is. If these two jumpers are
shorted the motherboard will automatically run at the frequency the CPU was specified to
run at.
However, the FSB Frequency can also be set through jumpers CJ1 and CJ2 and it may
therefore differ from the Frequency the CPU specifies. If CJ1 and CJ2 are to be used, JP6 &
JP7 must be open. Doing so may however force your CPU to operate out of its
specifications and therefore SOYO can not guarantee the proper functioning of your system.
Refer to the following table:
CPU Frequency
Automatic
66MHz
Manual 100MHz
133MHz
JP6 JP7
Short Short
1 2
Open
Open
1 2
Open Open
1 2
Open Open
1 2
10
CJ1
Open Open
1 2 3
1 2
2-3 2-3
1 2 3
1 2
1-2 2-3
1 2
1 2 3
1-2 1-2
1 2
1 2 3
CJ2
1 2 3
1 2 3
1 2 3
1 2 3