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Hardware Installation SY-6BA+ IV
44
Step 3. CPU multiplier release Jumper: (JP8)
Closing JP8 can make higher multiplier settings available on some
INTEL CPUs. For technical details read the following:
Your Pentium CPU has an input pin B21 (100/66# signal) to tell it at
what Front Side Bus (FSB) Frequency it is running; JP8 is connected to
this input pin. The actual FSB Frequency is however set through the
BIOS and it may therefore differ from the Frequency specified to the
CPU through JP8.
Because some INTEL CPUs have their multipliers limited at a FSB
Frequency of 100MHz and higher, telling the CPU that it is running at
66MHz though JP8 while setting a different (higher) FSB Frequency in
the BIOS may allow the user to set a higher multiplier value. Doing so
will 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:
Mode JP8
66MHz FSB clock CPUs Setting
66MHz FSB clock CPUs must use
this setting
short
100MHz FSB clock CPUs Setting
Normal open
Possible higher multiplier limit short
Note: Shorting the jumper will tell the CPU that it is running on
66MHz, this will release more multiplier settings on some INTEL
CPUs, but will make the system operate out of its specifications if
the actual frequency is 100 MHz or higher.
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