|
MS-5182 version 1.0
1. CPU Core Speed Derivation Procedure
The DIP Switch SW (8, 9, & 10) is used to adjust the CPU clock
frequency.
|
SW
|
CPU
|
|
8
|
9
|
10
|
Clock
|
|
ON
|
ON
|
ON
|
60MHz
|
|
OFF
|
ON
|
ON
|
66MHz
|
|
OFF
|
OFF
|
ON
|
75MHz
|
|
OFF
|
ON
|
OFF
|
83MHz
|
|
OFF
|
OFF
|
OFF
|
100MHz
|
|
ON
|
OFF
|
OFF
|
95MHz
|
2. The DIP Switch SW (5,6, and 7) is used to set the Core/Bus (Fraction)
ratio of the CPU. The actual core speed of the CPU is the Host Clock
Frequency multiplied by the Core/Bus ratio.
|
SW
|
CPU
|
|
5
|
6
|
7
|
Core/Bus Ratio
|
|
OFF
|
OFF
|
OFF
|
3.5x
|
|
OFF
|
ON
|
OFF
|
3x
|
|
ON
|
OFF
|
OFF
|
2x
|
|
ON
|
OFF
|
OFF
|
2.5x
|
|
OFF
|
OFF
|
ON
|
5.5x
|
|
OFF
|
ON
|
ON
|
5x
|
|
ON
|
OFF
|
ON
|
4x
|
|
ON
|
ON
|
ON
|
4.5X
|
3. CPU Voltage Setting: SW
|
V I/O
|
VCore
|
SW
|
|
1
|
2
|
3
|
4
|
|
3.4
|
3.5
|
ON
|
ON
|
ON
|
ON
|
|
3.4
|
3.4
|
OFF
|
ON
|
ON
|
ON
|
|
3.4
|
3.3
|
ON
|
OFF
|
ON
|
ON
|
|
3.4
|
3.2
|
OFF
|
OFF
|
ON
|
ON
|
|
3.4
|
3.1
|
ON
|
ON
|
OFF
|
ON
|
|
3.4
|
3.0
|
OFF
|
ON
|
OFF
|
ON
|
|
3.4
|
2.9
|
ON
|
OFF
|
OFF
|
ON
|
|
3.4
|
2.8
|
OFF
|
OFF
|
OFF
|
ON
|
|
3.4
|
2.7
|
ON
|
ON
|
ON
|
OFF
|
|
3.4
|
2.6
|
OFF
|
ON
|
ON
|
OFF
|
|
3.4
|
2.5
|
ON
|
OFF
|
ON
|
OFF
|
|
3.4
|
2.4
|
OFF
|
OFF
|
ON
|
OFF
|
|
3.4
|
2.3
|
ON
|
ON
|
OFF
|
OFF
|
|
3.4
|
2.2
|
OFF
|
ON
|
OFF
|
OFF
|
|
3.4
|
2.1
|
ON
|
OFF
|
OFF
|
OFF
|
|
3.4
|
2.0
|
OFF
|
OFF
|
OFF
|
OFF
|
Note: The DIP Switch SW (1,2,3, and 4) is used to adjust the CPU
voltage setting).
4. CPU Single/Dual Voltage Setting: JV1
This is used to set the CPU voltage from single to dual voltage
setting.
|
JV1
|
CPU
|
|
All Short
|
Single Voltage CPU
VI/O = Vcore
|
|
All Open
|
Dual Voltage CPU
VI/O = 3.45V
|
5. CPU Speed and Voltage Setting: SW and JV1
To set the proper speed and voltage of the CPU, you must know the
specifications of your CPU (always ask the vendor for the CPU specifications).
Then refert to the Table 6 (Intel Processor), Table 7 (Cyrix), and
Table 8 (AMD Processor) for proper setting.
6. Intel Processor:
a: Intel Pentium Processor
|
CPU Type
|
CPU Voltage
|
CPU Speed
|
|
V I/O
|
Vcore
|
JV1
|
SW
|
|
All Short
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
|
90 MHz
|
3.38
|
OFF
|
ON
|
ON
|
ON
|
OFF
|
OFF
|
OFF
|
ON
|
ON
|
ON
|
|
100 MHz
|
3.52
|
ON
|
ON
|
ON
|
ON
|
OFF
|
OFF
|
OFF
|
OFF
|
ON
|
ON
|
|
120 MHz
|
ON
|
ON
|
ON
|
ON
|
ON
|
OFF
|
OFF
|
ON
|
ON
|
ON
|
|
133 MHz
|
ON
|
ON
|
ON
|
ON
|
ON
|
OFF
|
OFF
|
OFF
|
ON
|
ON
|
|
150 MHz
|
ON
|
ON
|
ON
|
ON
|
ON
|
ON
|
OFF
|
ON
|
ON
|
ON
|
|
166 MHz
|
ON
|
ON
|
ON
|
ON
|
ON
|
ON
|
OFF
|
OFF
|
ON
|
ON
|
|
180 MHz
|
ON
|
ON
|
ON
|
ON
|
OFF
|
ON
|
OFF
|
ON
|
ON
|
ON
|
|
200 MHz
|
ON
|
ON
|
ON
|
ON
|
OFF
|
ON
|
OFF
|
OFF
|
ON
|
ON
|
b: Intel Pentium Processor with MMX Technology
|
CPU Type
|
CPU Voltage
|
CPU Speed
|
|
V I/O
|
Vcore
|
JV1
|
SW
|
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
|
166 MHz
|
3.3
|
2.8
|
All Open
|
OFF
|
OFF
|
OFF
|
ON
|
ON
|
ON
|
OFF
|
OFF
|
ON
|
ON
|
|
200 MHz
|
OFF
|
OFF
|
OFF
|
ON
|
OFF
|
ON
|
OFF
|
OFF
|
ON
|
ON
|
|
233 MHz
|
OFF
|
OFF
|
OFF
|
ON
|
OFF
|
OFF
|
OFF
|
OFF
|
ON
|
ON
|
Note: In case, you encounter a CPU with different voltage , just
go to section 3 and look for the proper voltage settings.
Back To Top
7. Cyrix Processor
Cyrix 6x86 processor uses PR To rate the speed of their processors
based on Intel Pentium processor core speed. For example, PR150
(120MHz) has 150MHz core speed of Intel Pentium processor, but it
has 120MHz core speed in Cyrix Processor. Cyrix 6x86 processor should
always use a more powerful fan (ask vendor for proper cooling fan).
a. Cyrix 6x86 Processor
|
CPU Type
|
CPU Voltage
|
CPU Speed
|
|
V I/O
|
Vcore
|
JV1
|
SW
|
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
| PR166 133MHz (66x2) |
3.5
|
All Short
|
ON
|
ON |
ON |
ON |
ON |
OFF |
OFF |
OFF |
ON |
ON
|
| PR150 120MHz (60x2) |
ON
|
ON |
ON |
ON |
ON |
OFF |
OFF |
ON |
ON |
ON
|
| PR200 166MHz (66x2.5) |
ON
|
ON |
ON |
ON |
ON |
OFF |
OFF |
OFF |
OFF |
ON
|
b: Cyrix 6x86L Processor
|
CPU Type
|
CPU Voltage
|
CPU Speed
|
|
V I/O
|
Vcore
|
JV1
|
SW
|
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
| PR166 133MHz (66x2) |
3.4
|
2.8
|
All Short
|
OFF |
OFF |
OFF |
ON |
ON |
OFF |
OFF |
OFF |
ON |
ON |
| PR150 120MHz (60x2) |
OFF |
OFF |
OFF |
ON |
ON |
OFF |
OFF |
ON |
ON |
ON |
| PR200 166MHz (66x2.5) |
OFF |
OFF |
OFF |
ON |
ON |
OFF |
OFF |
OFF |
OFF |
ON |
c: Cyrix 6x86MX Processor
|
CPU Type
|
CPU Voltage
|
CPU Speed
|
|
V I/O
|
Vcore
|
JV1
|
SW
|
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
| PR200 (75x2) |
3.4
|
2.9
|
All Open
|
ON |
OFF |
OFF |
ON |
ON |
OFF |
OFF |
OFF |
OFF |
ON |
| PR233 (66x3) |
ON |
OFF |
OFF |
ON |
OFF |
ON |
OFF |
OFF |
ON |
ON |
| PR233 (75x2.5) |
ON |
OFF |
OFF |
ON |
ON |
ON |
OFF |
OFF |
OFF |
ON |
| PR233 (83x2) |
ON |
OFF |
OFF |
ON |
ON |
OFF |
OFF |
OFF |
ON |
OFF |
| PR266 (83x2.5) |
ON |
OFF |
OFF |
ON |
ON |
ON |
OFF |
OFF |
ON |
OFF |
d: Cyrix MII Processor
|
CPU Type
|
CPU Voltage
|
CPU Speed
|
|
V I/O
|
Vcore
|
JV1
|
SW
|
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
| PR300 (66x3.5) |
3.4
|
2.9
|
All Open
|
ON |
OFF |
OFF |
ON |
OFF |
OFF |
OFF |
OFF |
ON |
ON |
| PR333 (100x2.5) |
OFF |
OFF |
OFF |
ON |
ON |
ON |
OFF |
OFF |
OFF |
OFF |
Back To Top
8. AMD Processor:
AMD K5/K6 processor uses pR to rate the speed of their processors
based on Intel Pentium processor core speed. For example, PR133
(100MHz) has 133Mhz core speed of Intel Pentium processor but has
100MHz core speed in AMD processor.
|
CPU Type
|
CPU Voltage
|
CPU Speed
|
|
V I/O
|
Vcore
|
JV1
|
SW
|
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
| PR133 |
3.52
|
All Short
|
ON |
ON |
ON |
ON |
ON |
OFF |
OFF |
OFF |
ON |
ON |
| PR150 |
ON |
ON |
ON |
ON |
ON |
ON |
OFF |
ON |
ON |
ON |
| PR166 |
ON |
ON |
ON |
ON |
ON |
ON |
OFF |
OFF |
ON |
ON |
b: AMD K6 Processor:
|
CPU Type
|
CPU Voltage
|
CPU Speed
|
|
V I/O
|
Vcore
|
JV1
|
SW
|
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
| 166MHz |
3.4
|
2.9
|
All Open
|
ON |
OFF |
OFF |
ON |
ON |
ON |
OFF |
OFF |
ON |
ON |
| 200MHz |
ON |
OFF |
OFF |
ON |
OFF |
ON |
OFF |
OFF |
ON |
ON |
| 233MHz |
3.4
|
3.2
|
OFF |
OFF |
ON |
ON |
OFF |
OFF |
OFF |
OFF |
ON |
ON |
| 266MHz |
3.4
|
2.2
|
OFF |
ON |
OFF |
OFF |
ON |
OFF |
ON |
OFF |
ON |
ON |
| 300MHz |
OFF |
ON |
OFF |
OFF |
ON |
ON |
ON |
OFF |
ON |
ON |
| K6-2 300MHz |
OFF |
ON |
OFF |
OFF |
OFF |
ON |
OFF |
OFF |
OFF |
OFF |
| K6-2 333MHz |
OFF |
ON |
OFF |
OFF |
OFF |
OFF |
OFF |
ON |
OFF |
OFF |
| K6-2 350MHz |
OFF |
ON |
OFF |
OFF |
OFF |
OFF |
OFF |
OFF |
OFF |
OFF |
Note: In case, you encounter a CPU with different voltage, just
go to section 3 and look for the proper voltage
Back To Top
|