Asus P5-99VM - Manual (Page 16)

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
1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3
HOST
SDRAM
PCI
133MHz
133MHz
33MHz
1 2 3
124MHz
124MHz
31MHz
112MHz
112MHz
37.3MHz
1 2 3
100MHz
100MHz
33.3MHz
95MHz
95MHz
31.7MHz
83.3MHz
83.3MHz
33MHz
75MHz
75MHz
30MHz
FS2
FS1
FS3
FS0
1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3
HOST
SDRAM
PCI
133MHz
88.9MHz
33MHz
1 2 3
124MHz
82.7MHz
31MHz
112MHz
74.7MHz
37.3MHz
1 2 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.