Asus TX97-N - Manual (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:
R CPU : BUS Frequency Ratio
CPU A
CPU B
CPU C
CPU D
CPU E ----
----
----
----
4.0X(4/1)
3
2
1
BF1 BF0 BF2
3
2
1
BF1 BF0 BF2
3.0x(3/1)
3.0x(3/1)
----
----
3.0x(3/1)
3
2
1
BF1 BF0 BF2
2.5x(5/2)
2.5x(5/2)
1.0x(1/1)
2.0x(2/1)
2.5x(5/2)
3
2
1
BF1 BF0 BF2
2.0x(2/1)
2.0x(2/1)
2.0x(2/1)
2.0x(2/1)
2.0x(2/1) ----
----
----
----
(4.5X)(9/2)
3
2
1
BF1 BF0 BF2
2
3
1
BF1 BF0 BF2
1.5x(3/2)
3.5x(7/2)
3.0x(3/1)
3.0x(3/1)
3.5x(7/2)
CPU External Clock (BUS) Frequency Selection
50MHz
FS1
3
2
1
FS0 FS2
60MHz
FS1 FS0 FS2
3
2
1
66MHz
FS1 FS0 FS2
3
2
1
68MHz
FS1 FS0 FS2
3
2
1
75MHz
FS1 FS0 FS2
3
2
1 (Jumpers)
III. INST
ALLA
TION