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Iii. installation, 16 asus hx97 user’s manual, Jumpers) iii. inst alla tion – Asus Pentium Motherboard HX97 User Manual

Page 16

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16

ASUS HX97 User’s Manual

III. INSTALLATION

4. 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).

5. CPU to BUS Frequency Ratio (BF0, BF1)

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.

R

CPU External Clock (BUS) Frequency Selection

CPU : BUS Frequency Ratio

50MHz

FS1

1
2
3

FS2

FS0

55MHz

FS1

1
2
3

FS2

FS0

60MHz

FS1

1
2
3

FS2

FS0

66MHz

FS1

1
2
3

FS2

FS0

3.0x(3/1)
3.0x(3/1)
4.0x(4/1)

BF1

BF0

2.5x(5/2)
2.5x(5/2)
1.0x(1/1)

BF1

BF0

2.0x(2/1)
2.0x(2/1)
2.0x(2/1)

BF1

BF0

1.5x(3/2)
3.5X(7/2)
3.0x(3/1)

BF1

BF0

Complete Names:
Intel Pentium P54C, P55C
AMD K5, K6
Cyrix M1, M2

P54C/K5
P55C/K6/M2
Cyrix M1

Set the jumpers by the Internal speed of the Intel, AMD, or Cyrix CPU as follows:

(BUS Frequency)

(Freq. Ratio)

CPU Model

Freq.

Ratio

BUS Freq.

FS0

FS1

FS2

BF1

BF0

Intel Pentium

200MHz

3.0x

66MHz

[2-3] [1-2] [2-3]

[2-3] [1-2]

Intel Pentium

166MHz

2.5x

66MHz

[2-3] [1-2] [2-3]

[2-3] [2-3]

Intel Pentium

150MHz

2.5x

60MHz

[2-3] [2-3] [1-2]

[2-3] [2-3]

Intel Pentium

133MHz

2.0x

66MHz

[2-3] [1-2] [2-3]

[1-2] [2-3]

Intel Pentium

120MHz

2.0x

60MHz

[2-3] [2-3] [1-2]

[1-2] [2-3]

Intel Pentium

100MHz

1.5x

66MHz

[2-3] [1-2] [2-3]

[1-2] [1-2]

Intel Pentium

90MHz

1.5x

60MHz

[2-3] [2-3] [1-2]

[1-2] [1-2]

Intel Pentium

75MHz

1.5x

50MHz

[2-3] [2-3] [2-3]

[1-2] [1-2]

AMD-K6-PR233

233MHz

3.5x

66MHz

[2-3] [1-2] [2-3]

[1-2] [1-2]

AMD-K6-PR200

200MHz

3.0x

66MHz

[2-3] [1-2] [2-3]

[2-3] [1-2]

AMD-K6-PR166

166MHz

2.5x

66MHz

[2-3] [1-2] [2-3]

[2-3] [2-3]

AMD-K5-PR133

100MHz

1.5x

66MHz

[2-3] [1-2] [2-3]

[1-2] [1-2]

AMD-K5-PR120

90MHz

1.5x

60MHz

[2-3] [2-3] [1-2]

[1-2] [1-2]

AMD-K5-PR100

100MHz

1.5x

66MHz

[2-3] [1-2] [2-3]

[1-2] [1-2]

AMD-K5-PR90

90MHz

1.5x

60MHz

[2-3] [2-3] [1-2]

[1-2] [1-2]

AMD-K5-PR75

75MHz

1.5x

50MHz

[2-3] [2-3] [2-3]

[1-2] [1-2]

*Cyrix 166+

133MHz

2.0x

66MHz

[2-3] [1-2] [2-3]

[1-2] [2-3]

*NOTE:

Only Cyrix Rev 2.7 or later is supported on this motherboard. See next page for revision identifi-
cation. Bootup screen will show 6x86-P166+ with the Cyrix 166+ installed on this motherboard.

(Jumpers)

III. INST

ALLA

TION

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