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MS-5172
CPU Speed and Voltage Setting: SW1, JV1 & JV3
To set the proper speed and voltage of the CPU, you must know the
specifications of your CPU (always ask the vendor for CPU specifications).
Then refer to Table 5 (Intel Processors), Table 6 (Cyrix Processors),
and Table 7 (AMD Processors) for proper setting.
1.JV1 & JV3
a: CPU Signle or Dual Voltage Setting: JV1
|
CPU Voltage
|
JV1
|
|
Single
|
OPEN
OPEN
|
|
Dual
|
SHORT
SHORT
|
b: CPU Vcore Voltage Setting: JV3
|
JV3
|
VI/O
|
Vcore
|
|
1
|
2
|
3
|
4
|
5
|
|
OPEN
|
SHORT
|
SHORT
|
SHORT
|
SHORT
|
3.5
|
3.5
|
|
OPEN
|
SHORT
|
SHORT
|
SHORT
|
OPEN
|
3.3
|
3.4
|
|
OPEN
|
SHORT
|
SHORT
|
OPEN
|
SHORT
|
3.3
|
3.3
|
|
OPEN
|
SHORT
|
SHORT
|
OPEN
|
OPEN
|
3.3
|
3.2
|
|
OPEN
|
SHORT
|
OPEN
|
SHORT
|
SHORT
|
3.3
|
3.1
|
|
OPEN
|
SHORT
|
OPEN
|
SHORT
|
OPEN
|
3.3
|
3.0
|
|
OPEN
|
SHORT
|
OPEN
|
OPEN
|
SHORT
|
3.3
|
2.9
|
|
OPEN
|
SHORT
|
OPEN
|
OPEN
|
OPEN
|
3.3
|
2.8
|
|
OPEN
|
OPEN
|
SHORT
|
SHORT
|
SHORT
|
3.3
|
2.7
|
|
OPEN
|
OPEN
|
SHORT
|
SHORT
|
OPEN
|
3.3
|
2.6
|
|
OPEN
|
OPEN
|
SHORT
|
OPEN
|
SHORT
|
3.3
|
2.5
|
|
OPEN
|
OPEN
|
SHORT
|
OPEN
|
OPEN
|
3.3
|
2.4
|
|
OPEN
|
OPEN
|
OPEN
|
SHORT
|
SHORT
|
3.3
|
2.3
|
|
OPEN
|
OPEN
|
OPEN
|
SHORT
|
OPEN
|
3.3
|
2.2
|
|
OPEN
|
OPEN
|
OPEN
|
OPEN
|
SHORT
|
3.3
|
2.1
|
|
OPEN
|
OPEN
|
OPEN
|
OPEN
|
OPEN
|
3.3
|
2.0
|
2. Intel Processors: Intel Processors
a. Intel Pentium Processors
|
CPU Type
|
CPU Speed & Voltage
|
|
VI/O
|
Vcore
|
JV1
|
JV3
|
SW1
|
| |
|
|
|
1
|
2
|
3
|
4
|
5
|
1
|
2
|
3
|
4
|
5
|
6
|
|
90MHz
|
3.3
|
Open
Open
|
|
OPEN
|
SHORT
|
SHORT
|
OPEN
|
SHORT
|
|
|
OPEN
|
OPEN
|
OPEN
|
SHORT
|
SHORT
|
SHORT
|
|
|
3.5
|
|
OPEN
|
SHORT
|
SHORT
|
SHORT
|
SHORT
|
|
|
100MHz
|
3.3
|
|
OPEN
|
SHORT
|
SHORT
|
OPEN
|
SHORT
|
|
| OPEN |
OPEN |
OPEN |
OPEN |
SHORT
|
SHORT
|
|
|
120MHz
|
|
SHORT
|
OPEN
|
OPEN
|
SHORT
|
SHORT
|
SHORT
|
|
|
133MHz
|
3.5
|
|
OPEN
|
SHORT
|
SHORT
|
SHORT
|
SHORT
|
|
|
SHORT
|
OPEN
|
OPEN
|
OPEN
|
SHORT
|
SHORT
|
|
| 150MHz |
|
SHORT
|
SHORT
|
OPEN
|
SHORT
|
SHORT
|
SHORT
|
|
| 166MHz |
|
SHORT
|
SHORT
|
OPEN
|
OPEN
|
SHORT
|
SHORT
|
|
| 200MHz |
|
OPEN
|
SHORT
|
OPEN
|
OPEN
|
SHORT
|
SHORT
|
|
b: Intel Pentium Processor with MMX Technology
| 166MHz |
3.3
|
2.8
|
Short
Short
|
|
1
|
2
|
3
|
4
|
5
|
|
OPEN
|
SHORT
|
OPEN
|
OPEN
|
OPEN
|
|
|
1
|
2
|
3
|
4
|
5
|
6
|
|
SHORT
|
SHORT
|
OPEN
|
OPEN
|
SHORT
|
SHORT
|
|
| 200MHz |
|
1
|
2
|
3
|
4
|
5
|
6
|
|
OPEN
|
SHORT
|
OPEN
|
OPEN
|
SHORT
|
SHORT
|
|
| 233MHz |
|
1
|
2
|
3
|
4
|
5
|
6
|
|
OPEN
|
OPEN
|
OPEN
|
OPEN
|
SHORT
|
SHORT
|
|
BACK TO TOP
3. 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 and Speed
|
|
VI/O
|
Vcore
|
JV1
|
JV3
|
SW1
|
| 6x86 PR150 |
3.5
|
Open
Open
|
|
1
|
2
|
3
|
4
|
5
|
|
OPEN
|
SHORT
|
SHORT
|
SHORT
|
SHORT
|
|
|
1
|
2
|
3
|
4
|
5
|
6
|
|
SHORT
|
OPEN
|
OPEN
|
SHORT
|
SHORT
|
SHORT
|
|
|
6x86 PR166
|
|
1
|
2
|
3
|
4
|
5
|
6
|
|
SHORT
|
OPEN
|
OPEN
|
OPEN
|
SHORT
|
SHORT
|
|
|
6x86L_PR166
|
3.3
|
2.8
|
Short
Short
|
|
1
|
2
|
3
|
4
|
5
|
|
OPEN
|
SHORT
|
SHORT
|
SHORT
|
SHORT
|
|
|
6x86 PR200
|
3.5
|
Open
Open
|
|
1
|
2
|
3
|
4
|
5
|
|
OPEN
|
SHORT
|
SHORT
|
SHORT
|
SHORT
|
|
|
1
|
2
|
3
|
4
|
5
|
6
|
|
SHORT
|
OPEN
|
OPEN
|
SHORT
|
SHORT
|
OPEN
|
|
|
6x86L PR200
|
3.3
|
2.8
|
Short
Short
|
|
1
|
2
|
3
|
4
|
5
|
|
OPEN
|
SHORT
|
SHORT
|
OPEN
|
SHORT
|
|
b. Cyrix 6x86MX Processor
|
CPU Type
|
CPU Speed & Voltage
|
|
VI/O
|
Vcore |
JV1
|
JV3
|
|
SW1
|
6x86MX
PR166 |
3.4 |
2.9 |
Short
Short |
|
1
|
2
|
3
|
4
|
5
|
|
OPEN
|
SHORT
|
OPEN
|
OPEN
|
SHORT
|
|
60x2.5
|
|
1
|
2
|
3
|
4
|
5
|
6
|
| SHORT |
SHORT |
OPEN |
SHORT |
SHORT |
SHORT |
|
|
66x2
|
| 1 |
2 |
3 |
4 |
5 |
6 |
| SHORT |
OPEN |
OPEN |
OPEN |
SHORT |
SHORT |
|
6x86MX
PR200 |
66x2.5
|
| 1 |
2 |
3 |
4 |
5 |
6 |
| SHORT |
SHORT |
OPEN |
OPEN |
SHORT |
SHORT |
|
|
75x2
|
| 1 |
2 |
3 |
4 |
5 |
6 |
| SHORT |
OPEN |
OPEN |
SHORT |
SHORT |
OPEN |
|
6x86MX
PR233 |
66x3
|
| 1 |
2 |
3 |
4 |
5 |
6 |
| OPEN |
SHORT |
OPEN |
OPEN |
SHORT |
SHORT |
|
|
75x2.5
|
| 1 |
2 |
3 |
4 |
5 |
6 |
| SHORT |
SHORT |
OPEN |
SHORT |
SHORT |
OPEN |
|
|
83x2
|
| 1 |
2 |
3 |
4 |
5 |
6 |
| SHORT |
OPEN |
OPEN |
OPEN |
SHORT |
OPEN |
|
6x86MX
PR266 |
66x3.5
|
| 1 |
2 |
3 |
4 |
5 |
6 |
| OPEN |
OPEN |
OPEN |
OPEN |
SHORT |
SHORT |
|
|
75x3
|
| 1 |
2 |
3 |
4 |
5 |
6 |
| OPEN |
SHORT |
OPEN |
SHORT |
SHORT |
OPEN |
|
|
83x2.5
|
| 1 |
2 |
3 |
4 |
5 |
6 |
| SHORT |
SHORT |
OPEN |
OPEN |
SHORT |
OPEN |
|
BACK TO TOP
4. 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 133 MHz core
speed of Intel Pentium processor but has 100MHz core speed in AMD
K5 processor.
AMD K5 Processor
|
CPU Type
|
CPU Voltage
|
| VI/O |
Vcore |
JV1
|
JV3
|
SW1
|
|
PR90
|
3.5
|
Open
Open
|
|
1
|
2
|
3
|
4
|
5
|
|
OPEN
|
SHORT
|
SHORT
|
SHORT
|
SHORT
|
|
|
1
|
2
|
3
|
4
|
5
|
6
|
|
OPEN
|
OPEN
|
OPEN
|
SHORT
|
SHORT
|
SHORT
|
|
|
PR100
|
|
1
|
2
|
3
|
4
|
5
|
6
|
|
OPEN
|
OPEN
|
OPEN
|
OPEN
|
SHORT
|
SHORT
|
|
| PR120 |
|
1
|
2
|
3
|
4
|
5
|
6
|
|
SHORT
|
OPEN
|
OPEN
|
SHORT
|
SHORT
|
SHORT
|
|
PR133/
PR150 |
|
1
|
2
|
3
|
4
|
5
|
6
|
|
SHORT
|
OPEN
|
OPEN
|
OPEN
|
SHORT
|
SHORT
|
|
| PR166 |
|
1
|
2
|
3
|
4
|
5
|
6
|
|
SHORT
|
SHORT
|
OPEN
|
OPEN
|
SHORT
|
SHORT
|
|
AMD K6 Processor:
| 166MHz |
3.3
|
2.9
|
Short
Short |
|
1
|
2
|
3
|
4
|
5
|
|
OPEN
|
SHORT
|
OPEN
|
OPEN
|
SHORT
|
|
|
1
|
2
|
3
|
4
|
5
|
6
|
|
SHORT
|
SHORT
|
OPEN
|
OPEN
|
SHORT
|
SHORT
|
|
| 200MHz |
|
1
|
2
|
3
|
4
|
5
|
6
|
| OPEN |
SHORT |
OPEN |
OPEN |
SHORT |
SHORT |
|
| 233MHz |
3.3
|
3.2
|
|
1
|
2
|
3
|
4
|
5
|
|
off
|
on
|
on
|
off
|
off
|
|
|
1
|
2
|
3
|
4
|
5
|
6
|
|
OPEN
|
OPEN
|
OPEN
|
OPEN
|
SHORT
|
SHORT
|
|
BACK TO TOP
|