MS-5184

CPU Speed and Voltage Setting: SW, JV1
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 the following tables for proper setting.

1. The DIP switch SW1 is used to adjust the CPU, AGP, and PCI clock frequency.

SW1
Clock
1
2
3
4
5
CPU
AGP
PCI
ON
ON
OFF
OFF
ON
133.3
88.7
44.3
ON
OFF
ON
OFF
ON
124
82.7
41.3
ON
ON
ON
OFF
ON
112
74.7
37.3
OFF
OFF
OFF
OFF
ON
100.2
66.6
33.3
ON
OFF
OFF
OFF
ON
92.25
63.5
31.7
OFF
ON
OFF
OFF
OFF
83.5
66.6
33.3
OFF
OFF
ON
ON
ON/OFF
75
75
37.5
OFF
ON
ON
ON
ON/OFF
66.8
66.6
33.4

a: The JP3 jumper setting is used to set the DRAM clock for CPU or AGP

JP3
DRAM Clock

1 ON
2 ON
3 OFF
CPU Clock
1 OFF
2 ON
3 ON
AGP Clock

Warning: We provide CPU Bus Frequency setting for over 100MHz. But setting the Bus Frequency over 100MHz may cause unstable or damaging result. We do no guarantee overclocking. (Damages resulting from overclocking will not be covered by the warranty or entertained by our technical support)

2. The SW2 (6,7, & 8) is sued 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.

SW2
CPU
5
6
7
Core/Bus Ratio
OFF
OFF
OFF
1.5
ON
OFF
OFF
2.0
ON
ON
OFF
2.5
OFF
ON
OFF
3.0
OFF
OFF
OFF
3.5
ON
OFF
ON
4.0
ON
ON
ON
4.5
OFF
ON
ON
5.0
OFF
OFF
ON
5.5

3. Processor Voltage Setting:
a: Vcore Voltage Setting: SW2
The Dip Switch SW2 (1-5) is used to set the processor Vcore voltage setting.

SW2
1
2
3
4
5
Vcore
ON
ON
ON
ON
OFF
3.5
OFF
ON
ON
ON
OFF
3.40
ON
OFF
ON
ON
OFF
3.3
OFF
OFF
ON
ON
OFF
3.2
ON
ON
OFF
ON
OFF
3.1
OFF
ON
OFF
ON
OFF
3.0
ON
OFF
OFF
ON
OFF
2.9
OFF
OFF
OFF
ON
OFF
2.8
ON
ON
ON
OFF
OFF
2.7
OFF
ON
ON
OFF
OFF
2.6
ON
OFF
ON
OFF
OFF
2.5
OFF
OFF
ON
OFF
OFF
2.4
ON
ON
OFF
OFF
OFF
2.3
OFF
ON
OFF
OFF
OFF
2.2
ON
OFF
OFF
OFF
OFF
2.1
OFF
OFF
OFF
OFF
OFF
2.0
ON
ON
ON
ON
ON
2.05
OFF
ON
ON
ON
ON
2.0
ON
OFF
ON
ON
ON
1.95
OFF
OFF
ON
ON
ON
1.9
ON
ON
OFF
ON
ON
1.85
OFF
ON
OFF
ON
ON
1.8

b: V I/O Voltage Setting: JP5

VI/O
JP5
1-2
3-4
5-6
7-8
9-10
3.3V
SHORT
OPEN
OPEN
OPEN
OPEN
3.45V
OPEN
SHORT
OPEN
OPEN
OPEN
3.6V
OPEN
OPEN
SHORT
OPEN
OPEN
3.8V
OPEN
OPEN
OPEN
SHORT
OPEN
4.0V
OPEN
OPEN
OPEN
OPEN
SHORT


4. Intel Processors: Intel Processors
a. Intel Pentium Processors

CPU Type
CPU Speed & Voltage
VI/O
Vcore
JP5
SW1
SW2
100MHz
3.5
 1-2 OPEN
3-4 SHORT
5-6 OPEN
7-8 OPEN
9-10 OPEN
1
2
3
4
5
OFF
ON
ON
ON
ON
1
2
3
4
5
6
7
8
ON
ON
ON
ON
OFF
OFF
OFF
OFF
133MHz
1
2
3
4
5
6
7
8
ON
ON
ON
ON
OFF
ON
OFF
OFF
166MHz
1
2
3
4
5
6
7
8
ON ON ON ON OFF ON ON OFF
200MHz
1
2
3
4
5
6
7
8
ON
ON
ON
ON
OFF
OFF
ON
 OFF

b: Intel Pentium Processor with MMX Technology

166MHz
3.3
2.8
1-2 SHORT
3-4 OPEN
5-6 OPEN
7-8 OPEN
9-10 OPEN
1
2
3
4
5
OFF
ON
ON
ON
ON
1
2
3
4
5
6
7
8
OFF
OFF
OFF
ON
OFF
ON
ON
OFF
200MHz
1
2
3
4
5
6
7
8
OFF OFF OFF ON OFF OFF ON OFF
233MHz
1
2
3
4
5
6
7
8
OFF OFF OFF ON OFF OFF OFF OFF

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5. 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
JP5
SW1
SW2
6x86
PR166
3.5
1-2 OPEN
3-4 SHORT
5-6 OPEN
7-8 OPEN
9-10 OPEN
1
2
3
4
5
OFF
ON
ON
ON
ON
1
2
3
4
5
6
7
8
ON
ON
ON
ON
OFF
ON
OFF
OFF
6x86L
PR166
3.4
2.8
1
2
3
4
5
6
7
8
OFF
OFF
OFF
ON
OFF
ON
ON
OFF
6x86L
PR200

Cyrix 6x86MX Processor

CPU Type
CPU Speed & Voltage
VI/O
 Vcore
JP5
SW1
SW2
PR166
(66x2)
3.4
2.9
 1-2 OPEN
3-4 SHORT
5-6 OPEN
7-8 OPEN
9-10 OPEN
1
2
3
4
5
OFF
ON
ON
ON
ON
1
2
3
4
5
6
7
8
ON
OFF
OFF
 ON OFF
ON
OFF
OFF
PR200 (75x2)
1
2
3
4
5
OFF
OFF
ON
ON
ON

1
2
3
4
5
6
7
8
ON OFF OFF ON OFF ON OFF OFF
PR233 (75x2.5)
1
2
3
4
5
6
7
8
ON
OFF
OFF
 ON OFF
ON
ON
OFF
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Cyrix MII Processor:
MII 300
(66x3.5)
3.4
2.9
1-2 OPEN
3-4 SHORT
5-6 OPEN
7-8 OPEN
9-10 OPEN
1
2
3
4
5
OFF
ON
ON
ON
ON
1
2
3
4
5
6
7
8
ON OFF OFF ON OFF OFF OFF OFF
MII 300
(75x3)
1 2 3 4 5
OFF OFF ON ON ON
1
2
3
4
5
6
7
8
ON OFF OFF ON OFF OFF ON OFF
MII 300 (83x3)
1 2 3 4 5
OFF ON OFF OFF OFF
1
2
3
4
5
6
7
8
ON OFF OFF ON OFF OFF ON OFF
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7. AMD Processor
AMD K5 Processor
CPU Type
CPU Voltage
VI/O Vcore
JP5
SW1
SW2
PR133
3.5
1-2 OPEN
3-4 SHORT
5-6 OPEN
7-8 OPEN
9-10 OPEN
1
2
3
4
5
OFF
ON
ON
ON
ON
1
2
3
4
5
6
7
8
ON
ON
ON
ON
OFF
ON
OFF
OFF
PR166
1
2
3
4
5
6
7
8
ON
ON
ON
ON
OFF
ON
ON
OFF

AMD K6 Processor

CPU Type
CPU Voltage & Speed
VI/O Vcore
JP5
SW1
SW2
166MHz
3.4
2.9
 1-2 OPEN
3-4 SHORT
5-6 OPEN
7-8 OPEN
9-10 OPEN
1
2
3
4
5
OFF
ON
ON
ON
ON
1 2 3 4 5 6 7 8
ON OFF OFF ON OFF ON ON OFF
200MHz
1 2 3 4 5 6 7 8
ON OFF OFF ON OFF OFF ON OFF
233MHz
3.4
3.2
1 2 3 4 5 6 7 8
OFF OFF ON ON OFF OFF OFF OFF
266MHz
3.4
2.2
1 2 3 4 5 6 7 8
OFF ON OFF OFF OFF ON OFF ON
300MHz
1 2 3 4 5 6 7 8
OFF ON OFF OFF OFF ON ON ON

AMD K6-2 Processors:

CPU Type
CPU Voltage & Speed
VI/O Vcore
JP5
SW1
SW2
300MHz
(100MHz FSB)
3.4
2.9
 1-2 OPEN
3-4 SHORT
5-6 OPEN
7-8 OPEN
9-10 OPEN
1
2
3
4
5
OFF
OFF
OFF
OFF
ON
1 2 3 4 5 6 7 8
OFF ON OFF OFF OFF OFF ON OFF
350MHz (100MHz FSB)
1
2
3
4
5
OFF
OFF
OFF
OFF
ON
1 2 3 4 5 6 7 8
OFF ON OFF OFF OFF OFF OFF OFF
400MHz
(100MHz FSB)
3.4
3.2
1 2 3 4 5
OFF
OFF
OFF
OFF
ON
1 2 3 4 5 6 7 8
OFF ON OFF OFF OFF ON OFF ON
333MHz
(95MHz FSB)
3.4
2.2
1 2 3 4 5
ON OFF OFF OFF ON
1 2 3 4 5 6 7 8
OFF ON OFF OFF OFF OFF OFF OFF
380MHz
(95MHz FSB)
1 2 3 4 5
ON OFF OFF OFF ON
1 2 3 4 5 6 7 8
OFF ON OFF OFF OFF ON OFF ON
300MHz
(66MHz FSB)
3.4
2.2
1 2 3 4 5
OFF ON ON ON ON
1 2 3 4 5 6 7 8
OFF ON OFF OFF OFF ON ON ON
333MHz
(66MHz FSB)
3.4
2.2
1 2 3 4 5
OFF ON ON ON ON
1 2 3 4 5 6 7 8
OFF ON OFF OFF OFF OFF ON ON
366MHz
(66MHz FSB)
3.4
2.2
1 2 3 4 5
OFF ON ON ON ON
1 2 3 4 5 6 7 8
OFF ON OFF OFF OFF OFF OFF ON

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