User's Manual 8
CPU Clock Speed Selection
HOT-617 mainboard features a clock generator to provide adjustable System Bus Clocks
and PCI Bus Clocks. JP3 is a 6-pin jumper that determine the System Bus Clock from 50
MHz to 66 MHz and PCI Bus Clock from 25MHz to 33MHz.
HOT-617 mainboard also provides Jumper JP4 to figure the CPU Core Clock multiplier.
By inserting or removing jumper caps on JP4, the user can change the
System Bus
Clock
/
CPU Core Clock
ratio from 1 : 2 to 1 : 4.
System Bus Clock & PCI Bus Clock Selection - JP3
System Bus Clock
50 MHz
60 MHz
66 MHz
PCI Bus Clock
25 MHz
30 MHz
33 MHz
JP3
Pentium Pro Processor Frequency Reference Table
Pentium Pro
System Bus
Clock - JP3
Multiplier-JP4
Remark
180 MHz
60 MHz
3 X
200 MHz
66 MHz
3 X
Factory Default
CPU Frequency Multiplier Selection - JP4
Frequency
Multiplier
2 X
2.5 X
3 X
3.5 X
4 X
JP4
