VIA 693/693A AT MAINBOARD
HARDWARE SETUP
3-17
JP 7
JP 8
JP 9
JP 10
CPU Speed
233/350MHz
266/400MHz
300/450MHz
333/500MHz
JP7
Open
JP8
Short
Open
Open
Short
Short
Short
Open
366/550MHz
Open Open
Ratio
3.5X
4X
4.5X
5X
5.5X
RS
HL
+
-
DIMM 3
DIMM 2
DIMM 1
FDC
IDE 1
IDE 2
JP10
Short
Short
Short
Short
Short
JP9
Short
Open
Open
Open
Open
400/600MHz
433/650MHz
466/700MHz
500/750MHz
Short
Open
Short
Short
Open
Short
Open
Open
533/800MHz
Short Short
6X
6.5X
7X
7.5X
8X
Open
Open
Open
Open
Open
Short
Short
Short
Short
Open
The jumpers above allow you to select the CPU clock ratio. However,
most CPU clock ratio is fixed and "locked" in the CPU and you can not
change the ratio by jumper setting. In word, the jumper setting on the
mainboard is inactive when you are using the processor whose clock ratio
is "locked" inside the CPU. Basically, you have to check the specification
of your CPU carefully before you can make the clock ratio setting.
(F) JP14: CPU Voltage Range Selection
(Optional)
JP14 is a special design on the mainboard which allows you to select the proper
CPU voltage range (Vcore) for the Pentium II/!!! Processors so that it will provide
good protection to the CPU.
The voltage regulator on the mainboard generates 1.3V ~ 3.5V DC voltage to
support different processors. Basically, mainboards will use the VID signal
(VID0~VID4) from the processor to generate the proper CPU voltage (Vcore). In
case that there is the poor connection between Slot 1 connector and CPU, or
uninstall the CPU from the mainboard while the system power is "ON". Under
such circumstance, mainboard may receive wrong VID signal and send wrong
Vcore to the CPU.
Unfortunately, wrong Vcore may destroy the CPU. So JP14 is designed on the
mainboard to control the Vcore within the safe range so that it won't make any
damage to the CPU because of wrong VID signal. Since most Pentium II/!!!
processors require the Vcore below 2.05V except few Pentium II processors. So
