6220M Mainboard Chapter 1 Introduction
5
1-4 Running 100 MHz CPU Bus (with JP11)
The mainboard provides
Jumper 11
that allows you to set your CPU host clock
and perform CPU overclock function. There are two ways to set CPU host clock at
‘closed’ and ‘open’. When setting ‘closed’, the system will automatically detect the
CPU host clock, for instance 66MHz and 100MHz. Another way is to set
Jumper 11
at ‘open’ and the system can be operated with a higher frequency than the nominal one
on CPU.
We recommend that users should use Intel Pentium
II/III 100 MHz CPU, running
at 350, 400, 450 and 500MHz internal clock speed. Moreover, the SDRAM memory
module must be 8 nano-second (Maximum Frequency 125 MHz) speed of
memory –die or less. However, based on Intel’s design, we don’t recommend users to
run over 100MHz CPU host bus.
Please note that the default setting of Jumper 11 is ‘closed’.
Jumper 11 BASE CLK
Closed
Auto
Open
100 MHz
(a) Pin Closed (b)
Pin Open
Slot 1
JP11
If you would like to run over 100MHz CPU host bus, like 112 and 124MHz,
please set “CPU Clock Frequency” in “CHIPSET FEATURES SETUP” from
the BIOS setup screen. If the system can’t boot up with the clock frequency
that you set to, you can clear the set frequency by pressing the ‘Insert” key on
keyboard. After restarting the system, you have the system operating at the
default frequency.
