Intel PT-6IBT User Manual page 35

440BX/ZX AT
(F) JP14: CPU Voltage Range Selection (Optional)
JP14 is a special design on the mainboard which allows you to select the CPU
voltage range (Vcore) for the Pentium II/III processors.
The voltage regulator on the mainboard will generate 1.3V ~ 3.5V DC to support
different processors. Basically, Most Pentium II mainboards will use the VID
signal (VID0~VID4) from the processor to decide 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.
JP14 is designed 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/III processors require the Vcore below 2.05V except few
Pentium II processors. So the default setting of JP14 will limit the Vcore at
1.3V~2.05V. Please do not change the setting on JP14 unless your CPU needs the
voltage higher than 2.05V.
OPEN: Vcore = 1.3V ~ 2.05V
SHORT : Vcore = 1.3V ~ 3.5V.
MAINBOARD
+
-
BAT 1
IDE 2
IDE 1
AWARD BIOS SETUP
DIMM 3
DIMM 2
DIMM 1
FDC
JP14
3-21