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MS-5170
CPU Speed and Voltage Setting: SW1 & JV0~JV3, JSD
To adjust the speed and voltage of the CPU, you must know the specifications
of your CPU (always ask the vendor for CPU specifications). Then
refer to the following tables for proper setting.
1.CPU Core Speed Derivation Procedure
The Switch SW1 (4&5) is used to adjusted the CPU clock frequency.
|
SW1
|
CPU
|
|
4
|
5
|
Clock
|
|
ON
|
ON
|
55MHz
|
|
ON
|
OFF
|
60MHz
|
|
OFF
|
OFF
|
66MHz
|
b: The Switch SW1 (1,2, & 3) 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.
|
SW1
|
Intel
|
Cyrix
|
AMD
|
|
1
|
2
|
3
|
6x86
|
6x86MX
|
K5
|
K6
|
|
OFF
|
OFF
|
OFF
|
1.5
|
3
|
3.5
|
1.5
|
3.5
|
|
ON
|
OFF
|
OFF
|
2
|
2
|
2
|
2
|
|
|
OFF
|
ON
|
OFF
|
3
|
|
3
|
|
3
|
|
ON
|
ON
|
OFF
|
2.5
|
|
2.5
|
|
|
|
ON
|
OFF
|
ON
|
|
|
|
|
4
|
2. CPU Voltage Setting: JV0 ~ JV3
|
V I/O
|
Vcore
|
JV0-JV3
|
|
JV3
|
JV2
|
JV1
|
JV0
|
|
3.5
|
3.5
|
SHORT
|
SHORT
|
SHORT
|
SHORT
|
|
3.3
|
3.4
|
SHORT
|
SHORT
|
SHORT
|
OPEN
|
|
3.3
|
3.3
|
SHORT
|
SHORT
|
OPEN
|
SHORT
|
|
3.3
|
3.2
|
SHORT
|
SHORT
|
OPEN
|
|
|
3.3
|
3.1
|
SHORT
|
OPEN
|
SHORT
|
SHORT
|
|
3.3
|
3.0
|
SHORT
|
OPEN
|
SHORT
|
OPEN
|
|
3.3
|
2.9
|
SHORT
|
OPEN
|
OPEN
|
SHORT
|
|
3.3
|
2.8
|
SHORT
|
OPEN
|
OPEN
|
OPEN
|
|
3.3
|
2.7
|
OPEN
|
SHORT
|
SHORT
|
SHORT
|
|
3.3
|
2.6
|
OPEN
|
SHORT
|
SHORT
|
OPEN
|
|
3.3
|
2.5
|
OPEN
|
SHORT
|
OPEN
|
SHORT
|
|
3.3
|
2.4
|
OPEN
|
SHORT
|
OPEN
|
OPEN
|
|
3.3
|
2.3
|
OPEN
|
OPEN
|
SHORT
|
SHORT
|
|
3.3
|
2.2
|
OPEN
|
OPEN
|
SHORT
|
OPEN
|
|
3.3
|
2.1
|
OPEN
|
OPEN
|
OPEN
|
SHORT
|
|
3.3
|
2.0
|
OPEN
|
OPEN
|
OPEN
|
OPEN
|
CPU Single or Dual Voltage Setting: JSD
This jumper is used to set the CPU single or dual voltage
|
JSD
|
CPU
|
|
S
|
Open
|
Dual Voltage CPU
|
|
D
|
Short
|
|
S
|
Short
|
Single Voltage CPU
|
|
D
|
Open
|
3. Intel Processors: Intel Processors
Intel Pentium Processor with MMX Technology
JV0-JV3:
|
CPU Type
|
CPU Voltage
|
CPU Speed
|
|
V I/O
|
Vcore
|
JSD
|
JV0-JV3
|
SW1
|
| 90MHz |
Short
Open
|
JV3
|
JV2
|
JV1
|
JV0
|
1
|
2
|
3
|
4
|
5
|
6
|
|
3.3
|
SHORT
|
SHORT
|
OPEN
|
SHORT
|
OPEN
|
OPEN
|
OPEN
|
SHORT
|
OPEN
|
OPEN
|
|
3.5
|
SHORT
|
SHORT
|
SHORT
|
SHORT
|
| 100MHz |
3.3
|
SHORT
|
SHORT
|
OPEN
|
SHORT
|
OPEN
|
OPEN
|
OPEN
|
OPEN
|
OPEN
|
OPEN
|
| 120MHz |
3.3
|
SHORT
|
OPEN
|
OPEN
|
SHORT
|
OPEN
|
OPEN
|
| 133MHz |
3.5
|
SHORT
|
SHORT
|
SHORT
|
SHORT
|
SHORT
|
OPEN
|
OPEN
|
OPEN
|
OPEN
|
OPEN
|
| 150MHz |
3.5
|
SHORT
|
SHORT
|
OPEN
|
SHORT
|
OPEN
|
OPEN
|
| 166MHz |
3.5
|
SHORT
|
SHORT
|
OPEN
|
OPEN
|
OPEN
|
OPEN
|
| 200MHz |
3.5
|
OPEN
|
SHORT
|
OPEN
|
OPEN
|
OPEN
|
OPEN
|
BACK TO TOP
Intel Pentium Processors with MMX technology
| 166MHz |
3.3 |
2.8 |
Open
Short
|
SHORT |
OPEN |
OPEN |
OPEN |
SHORT |
SHORT |
OPEN |
OPEN |
OPEN |
OPEN |
| 200MHz |
OPEN |
SHORT |
OPEN |
OPEN |
OPEN |
OPEN |
| 233MHz |
OPEN |
OPEN |
OPEN |
OPEN |
OPEN |
OPEN |
4. Cyrix Processors: 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 has 120MHz core speed in Cyrix. Cyrix
6x86 processor should always use a more powerful fan (ask vendor for
proper cooling fan).
Cyrix 6x86/6x86L Processors:
|
CPU Type
|
CPU Voltage
|
CPU Speed
|
|
V I/O
|
Vcore
|
JSD
|
JV0-JV3
|
SW1
|
|
JV3
|
JV2
|
JV1
|
JV0
|
1
|
2
|
3
|
4
|
5
|
6
|
6x86
PR133 |
3.3
|
Short
Open
|
SHORT
|
SHORT
|
OPEN
|
SHORT
|
SHORT
|
OPEN
|
OPEN
|
SHORT
|
SHORT
|
OPEN
|
6x86
PR150 |
3.5
|
SHORT
|
SHORT
|
SHORT
|
SHORT
|
SHORT |
OPEN |
OPEN |
SHORT |
OPEN |
OPEN |
6x86
PR166 |
3.3
|
SHORT
|
SHORT
|
OPEN
|
SHORT
|
SHORT
|
OPEN
|
OPEN
|
OPEN
|
OPEN
|
OPEN
|
6x86l
PR166 |
3.3 |
2.8 |
Open
Short |
SHORT |
OPEN |
OPEN |
OPEN |
Cyrix 6x86MX Processors
PR166
(60x2.5) |
2.9 |
Open
Short
|
SHORT |
OPEN |
OPEN |
SHORT |
SHORT |
SHORT |
OPEN |
SHORT |
OPEN |
OPEN |
| PR166 (66x2) |
SHORT |
OPEN |
OPEN |
OPEN |
OPEN |
OPEN |
| PR200 (66X2.5) |
SHORT |
SHORT |
OPEN |
OPEN |
OPEN |
OPEN |
PR233
(66X3) |
OPEN |
SHORT |
OPEN |
OPEN |
OPEN |
OPEN |
| PR266 (66x3.5) |
OPEN |
OPEN |
OPEN |
OPEN |
OPEN |
OPEN |
BACK TO TOP
5. AMD Processor: AMD K5 processor uses
PR to rate the speed of their processors based on Intel Pentium processor
core speed. For example PR133 (100MHz) has 133 MHz core speed of Intel
Pentium processor but has 100MHz core speed in AMD K5 processor.
AMD K5 Processors:
|
CPU Type
|
CPU Voltage
|
CPU Speed
|
|
V I/O
|
Vcore
|
JSD
|
JV0-JV3
|
SW1
|
|
JV3
|
JV2
|
JV1
|
JV0
|
1
|
2
|
3
|
4
|
5
|
6
|
| PR90 |
3.5
|
Short
Open
|
SHORT
|
SHORT
|
SHORT
|
SHORT
|
OPEN |
OPEN |
OPEN |
SHORT
|
OPEN
|
OPEN
|
| PR100 |
OPEN |
OPEN |
OPEN |
OPEN |
OPEN |
OPEN
|
| PR120 |
SHORT |
OPEN |
OPEN |
SHORT |
OPEN |
OPEN
|
|
PR133/
PR150
|
SHORT |
OPEN |
OPEN |
OPEN |
OPEN |
OPEN
|
| PR166 |
SHORT |
SHORT |
OPEN |
OPEN |
OPEN |
OPEN
|
AMD K6 Processors:
PR166
|
3.3 |
2.9 |
Open
Short
|
SHORT |
OPEN |
OPEN |
SHORT |
SHORT |
SHORT |
OPEN |
OPEN |
OPEN |
OPEN |
| PR200 |
OPEN |
SHORT |
OPEN |
OPEN |
OPEN |
OPEN |
| PR233 |
3.3 |
3.2 |
SHORT |
SHORT |
OPEN |
OPEN |
OPEN |
OPEN |
OPEN |
OPEN |
OPEN |
OPEN |
BACK TO TOP
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