440EX/LX AT
MAINBOARD
HARDWARE SETUP
3-20
For example, if you are installing the 300MHz Pentium™ II processor
onto the mainboard. You may look into the data sheet which comes with
the processor and you will see the FSB clock is 66.6MHz.
Now you may introduce these parameters in to the formula and get:
300MHz
(CPU Frequency)
÷
66.6MHz
(FSB Clock)
= 4.5X
(Clock Ratio)
According to the example above, you can see that it is very easy to
calculate the CPU clock ratio when you have the information of the CPU
frequency and its FSB speed. In order to let you have a better picture of the
calculation, the procedures are summarized as followings:
1.
Check the data sheet for your CPU frequency.
2.
Check the data sheet and get the FSB clock of your CPU.
3.
Use the following formula to calculate the CPU clock ratio.
CPU Frequency
÷
FSB Clock = CPU Clock Ratio
(D) JP 11: Flash ROM (BIOS) type Selection (
optional
)
CN4
CN 5
BAT 1
CN
1
SYS.
B
IO
S
+
-
CN10
CN11
CN6
SLOT
1
CN
7
CN 9
CN 2
CN 16
CN 1
5
CN
1
4
CN17
CN18
RS
HL
TL
SL
PW
PL KBLOCK
SPKR
JP 7
JP 8
JP 9
JP 3
JP
4
JP
5
JP
6
JP 11
CN 8
CN
1
9
JP 11
1
2
3
PIN 1-2 : For +5V FLASH ROM
PIN 2-3: For +12V FLASH ROM
