Asus TX97-N User Manual download pdf (Page 14)

14 ASUS TX97-N User’s Manual

III. INSTALLATION

2. CPU to BUS Frequency Ratio (BF0, BF1, BF2)

These jumpers set the frequency ratio between the Internal frequency of the CPU

and the External frequency (called the BUS Clock) within the CPU. These must

be set together with the above jumpers CPU External (BUS) Frequency Selection.

3. CPU External (BUS) Frequency Selection (FS0, FS1, FS2)

These jumpers tell the clock generator what frequency to send to the CPU. These

allow the selection of the CPU’s External frequency (or BUS Clock). The BUS Clock

times the BUS Ratio equals the CPU’s Internal frequency (the advertised CPU speed).

WARNING! Frequencies above 66MHz exceed the specifications for the

onboard Intel Chipset and are not guaranteed to be stable.

Match the table’s Ratio column

to these CPU types:

CPU : BUS Frequency Ratio

CPU A

CPU B

CPU C

CPU D

CPU E

----

4.0X(4/1)

BF1

BF0

BF2

BF1

BF0

BF2

3.0x(3/1)

----

3.0x(3/1)

BF1

BF0

BF2

2.5x(5/2)

1.0x(1/1)

2.0x(2/1)

2.5x(5/2)

BF1

BF0

BF2

2.0x(2/1)

----

(4.5X)(9/2)

BF1

BF0

BF2

BF1

BF0

BF2

1.5x(3/2)

3.5x(7/2)

3.0x(3/1)

3.5x(7/2)

CPU External Clock (BUS) Frequency Selection

50MHz

FS1

FS0

FS2

60MHz

FS1

FS0

FS2

66MHz

FS1

FS0

FS2

68MHz

FS1

FS0

FS2

75MHz

FS1

FS0

FS2

(Jumpers)

III. INSTALLATION

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