Asus P5-99VM P5-99VM User Manual - Page 16

ASUS P5-99VM User's Manual, CPU External BUS Frequency Selection, FS0, FS1, FS2, FS3, CPU to BUS

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01 III. H/W SETUP Motherboard Settings III. HARDWARE SETUP 6. CPU External (BUS) Frequency Selection (FS0, FS1, FS2, FS3) These jumpers tell the clock generator what frequency to send to the CPU, chipset, and AGP. 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). 7. CPU to BUS Frequency Multiple (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 jumpers for CPU External (BUS) Frequency Selection. P5-99VM CPU Settings Match the Mult. (Multiple) column of the table on the opposite page to these CPU types: CPU A: CPU B: CPU C: CPU D: CPU E: AMD-K6-III, AMD-K6-2/400&faster AMD-K6-2/380&slower, AMD-K6 Intel Pentium P54C, AMD-K5 Intel Pentium P55C, IBM/Cyrix 6x86MX, IBM/Cyrix M II IBM/Cyrix 6x86, IBM/Cyrix 6x86L 123 123 FS3 FS2 FS1 FS0 HOST 133MHz 124MHz SDRAM 133MHz 124MHz PCI 33MHz 31MHz 123 123 123 123 112MHz 100MHz 95MHz 83.3MHz 112MHz 100MHz 95MHz 83.3MHz 37.3MHz 33.3MHz 31.7MHz 33MHz 123 75MHz 75MHz 30MHz 123 66.6MHz 66.6MHz 33MHz 123 FS3 FS2 FS1 123 123 123 123 123 123 123 FS0 HOST 133MHz 124MHz 112MHz 100MHz 100MHz 95MHz 66.7MHz SDRAM 88.9MHz 82.7MHz 74.7MHz 75MHz 66.7MHz 63.3MHz 100MHz PCI 33MHz 31MHz 37.3MHz 30MHz 33.3MHz 31.7MHz 33.3MHz 90MHz 90MHz 30MHz CPU External Frequency BF→2 1 0 3 2 1 210 210 210 210 210 210 210 CPU A → 3.5x(7/2) 6.0x(6/1) 2.5x(5/2) 3.0x(3/1) CPU B → 3.5x(7/2) 2.0x(2/1) 2.5x(5/2) 3.0x(3/1) CPU C → 1.5x(3/2) 2.0x(2/1) 2.5x(5/2) 3.0x(3/1) CPU D → 3.5x(7/2) 2.0x(2/1) 2.5x(5/2) 3.0x(3/1) CPU E → 3.0x(3/1) 2.0x(2/1) 1.0x(1/1) - 4.0x(4/1) 4.0x(4/1) - - - 4.5x(9/2) 4.5x(9/2) - - - 5.0x(5/1) 5.5x(11/2) 5.0x(5/1) 5.5x(11/2) - - - - - - CPU Core : BUS Frequency Multiple WARNING! Frequencies above 100MHz exceed the specifications for the onboard chipset and are not guaranteed to be stable. The table on the following page is for general reference purposes only. Always refer to the instructions included with your CPU when possible. 16 ASUS P5-99VM User's Manual

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16
ASUS P5-99VM User’s Manual
III. HARDWARE SETUP
Motherboard Settings
III. H/W SETUP
6.
CPU External (BUS) Frequency Selection
(FS0, FS1, FS2, FS3)
These jumpers tell the clock generator what frequency to send to the CPU, chipset,
and AGP.
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
fre-
quency (the advertised CPU speed).
7.
CPU to BUS Frequency Multiple (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 jumpers for
CPU External (BUS) Frequency Selection.
5.5x(11/2)
5.5x(11/2)
—
—
—
0
1
Match the
Mult.
(Multiple) column of the table on
the opposite page to these CPU types:
P5-99VM CPU Settings
CPU External Frequency
FS2
FS1
FS3
FS0
12
3
12
3
12
3
12
3
12
3
12
3
HOST
SDRAM
PCI
133MHz
133MHz
33MHz
12
3
124MHz
124MHz
31MHz
112MHz
112MHz
37.3MHz
12
3
100MHz
100MHz
33.3MHz
95MHz
95MHz
31.7MHz
83.3MHz
83.3MHz
33MHz
75MHz
75MHz
30MHz
FS2
FS1
FS3
FS0
12
3
12
3
12
3
12
3
12
3
12
3
HOST
SDRAM
PCI
133MHz
88.9MHz
33MHz
12
3
124MHz
82.7MHz
31MHz
112MHz
74.7MHz
37.3MHz
12
3
100MHz
75MHz
30MHz
100MHz
66.7MHz
33.3MHz
95MHz
63.3MHz
31.7MHz
66.7MHz
100MHz
33.3MHz
90MHz
90MHz
30MHz
CPU Core : BUS Frequency Multiple
3.0x(3/1)
3.0x(3/1)
3.0x(3/1)
3.0x(3/1)
—
2.5x(5/2)
2.5x(5/2)
2.5x(5/2)
2.5x(5/2)
1.0x(1/1)
6.0x(6/1)
2.0x(2/1)
2.0x(2/1)
2.0x(2/1)
2.0x(2/1)
3.5x(7/2)
3.5x(7/2)
1.5x(3/2)
3.5x(7/2)
3.0x(3/1)
CPU A
CPU B
CPU C
CPU D
CPU E
4.0x(4/1)
4.0x(4/1)
—
—
—
4.5x(9/2)
4.5x(9/2)
—
—
—
→
→
→
→
→
5.0x(5/1)
5.0x(5/1)
—
—
—
66.6MHz
66.6MHz
33MHz
1
2
3
BF
→
2
1
0
2
1
0
2
1
0
2
1
0
2
1
0
2
1
0
2
1
0
2
1
0
CPU A:
AMD-K6-III, AMD-K6-2/400&faster
CPU B:
AMD-K6-2/380&slower, AMD-K6
CPU C:
Intel Pentium P54C, AMD-K5
CPU D:
Intel Pentium P55C, IBM/Cyrix 6x86MX,
IBM/Cyrix M II
CPU E:
IBM/Cyrix 6x86, IBM/Cyrix 6x86L
WARNING!
Frequencies above 100MHz exceed the specifications for the on-
board chipset and are not guaranteed to be stable. The table on the following
page is for general reference purposes only. Always refer to the instructions
included with your CPU when possible.