DFI G486VPB User Manual page 43

Jumpers JP4 and JP8
CPU External Clock Speed for PCI Slots
These jumpers should be configured according to the
type of CPU installed on the system board. Set Jumpers
JP4 and JP8 pins 2 and 3 to On if the CPU external
clock speed is greater than 33MHz. If the CPU external
clock speed is less than or equal to 33MHz, set Jumpers
JP4 and JP8 pins 1 and 2 to On.
1 2 3
1-2 On:
CPU External Clock Speed
<= 33MHz (Default)
Set Jumpers JP4 and JP8 pins 2-3 to On if your
G486VPB system board uses one of the following
CPUs: 486DX-50, 486DX2-80, 486DX-40 or
486SX-40. The CPU external clock speed supported
by each of them is greater than 33MHz.
G486VPB
1 2 3
2-3 On:
CPU External Clock
Speed > 33MHz
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