VIA 693 Socket 370 AT Mainboard
HARDWARE SETUP
3-17
The jumpers mentioned in this chapter labeled with “optional” means
they are the optional choice for customers and the related components are
normally not populated on the mainboard. In order to make the
mainboard works properly in your PC system, please make sure all
jumper settings are at correct before installing this mainboard.
(A) JP4: CPU Front Side Bus (FSB) clock selection
JP4 is designed on the board for the purpose when you want to choose differtne
FSB clock. You can use the setting on JP4 to force the FSB clock at 66/100MHz
despite of the CPU type detected by the system BIOS.
CPU
JP 3
1
2
3
Pin 1 & Pin 2 Short:
(Default setting)
CPU will detect the FSB clock
automatically.
Pin 2 & Pin3 Short:
FSB clock will be forced to run at
66MHz frequency.
Open:
FSB clock will be forced to run at
100MHz frequency.
Note: When you have installed the CPU onto the mainboard, most processor
itself will decide the FSB clock and you don't have to make any choice
on the FSB clock. JP4 allows you to select different FSB clock for your
CPU. However, if you use JP4 on the "Over clock" purpose, it is not
recommended because the system board may become unstable.
