DFI P5XV3, User Manual

Page: 21 / 78

2
Hardware Installation
21
2.2.2.1 Jumper Settings of the Processors
A processor’s internal clock speed is the actual internal operating
clock of the processor. Its frequency ratio differs from one
processor to another. An Intel
 processor will multiply the external
bus clock by the frequency ratio to become the internal clock
speed. Internal clock speed is the commonly known speed of
Intel
 processors in the market and is the actual operating clock of
the processor (external bus clock x frequency ratio = internal
clock speed). Cyrix
 and AMD  processors use the PR-rating
system which is the overall processor performance rating.
The voltage of the processors are divided into Single voltage and
Dual voltage processors. Single voltage processors include Intel
Pentium

, Cyrix

6x86 and AMD

K5 processors. Dual voltage
processors include Intel Pentium

processors with MMX
technology, Cyrix

6x86L and 6x86MX, and AMD

K6 processors.
Make sure all jumpers are set correctly before applying power or
you may damage the processor or system board. Use a needle-
nosed plier to move the jumpers if necessary.
The table below shows the External System Bus Clock of the
processors supported by the system board and their
corresponding PCI Clock and ISA Bus Clock.
Ext. System Bus Clock
60MHz
66MHz
PCI CLK
30MHz
33MHz
ISA Bus CLK
7.5MHz
8.25MHz