ASUS ap55tv 用户手册
10
ASUS P/I-AP55TV User’s Manual
III. INSTALLATION
6. CPU External (BUS) Frequency Selection (JP14, JP15, JP16)
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).
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 Ratio (JP18, JP19)
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.
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.
50MHz
55MHz
60MHz
66MHz
CPU External Clock (BUS) Frequency Selection
CPU : BUS Frequency Ratio (1.5x, 2.0x, 2.5x, 3.0x)
1.5 x
JP19
JP18
1
2
3
2
3
2.0 x
2.5 x
3.0 x
1
2
3
2
3
1
2
3
2
3
1
2
3
2
3
JP19
JP18
JP19
JP18
JP19
JP18
JP15
JP14
JP16
JP15
JP14
JP16
JP15
JP14
JP16
JP15
JP14
JP16
Set the jumpers by the Internal speed of the Intel, AMD, or Cyrix CPU as follows:
(BUS Freq.)
(Freq. Ratio)
CPU Model
Freq.
Ratio
BUS Freq.
JP16 JP15 JP14
JP19 JP18
Intel Pentium
200MHz
3.0x
66MHz
[2-3] [2-3] [1-2]
[1-2] [2-3]
Intel Pentium
166MHz
2.5x
66MHz
[2-3] [2-3] [1-2]
[2-3] [2-3]
Intel Pentium
150MHz
2.5x
60MHz
[1-2] [2-3] [2-3]
[2-3] [2-3]
Intel Pentium
133MHz
2.0x
66MHz
[2-3] [2-3] [1-2]
[2-3] [1-2]
Intel Pentium
120MHz
2.0x
60MHz
[1-2] [2-3] [2-3]
[2-3] [1-2]
Intel Pentium
100MHz
1.5x
66MHz
[2-3] [2-3] [1-2]
[1-2] [1-2]
Intel Pentium
90MHz
1.5x
60MHz
[1-2] [2-3] [2-3]
[1-2] [1-2]
Intel Pentium
75MHz
1.5x
50MHz
[2-3] [2-3] [2-3]
[1-2] [1-2]
AMD
100MHz
1.5x
66MHz
[2-3] [2-3] [1-2]
[1-2] [1-2]
AMD
90MHz
1.5x
60MHz
[1-2] [2-3] [2-3]
[1-2] [1-2]
AMD
75MHz
1.5x
50MHz
[2-3] [2-3] [2-3]
[1-2] [1-2]
*Cyrix 166+
133MHz
2.0x
66MHz
[2-3] [2-3] [1-2]
[2-3] [1-2]
*NOTE:
Only Cyrix Revision 2.7 or later is supported on this motherboard. See next page for revision
identification. Bootup screen will show 6x86-P166+ -S CPU at 133MHz with the Cyrix
166+ installed on this motherboard.
identification. Bootup screen will show 6x86-P166+ -S CPU at 133MHz with the Cyrix
166+ installed on this motherboard.
(Jumpers)
III. INST
ALLA
TION