ALLATION INST .III

Jumpers

III. INSTALLATION

Compatible Cyrix CPU Identification

The only Cyrix 6x86-PR166+ CPU that is supported on this motherboard must be Revision 2.7 or later. Look on the underside of the CPU for the serial number. The number should read G8DC6620A or later.

8.Voltage Regulator Output Selection (VID0, VID1, VID2, VID3)

These jumpers set the VCORE voltage supplied to the CPU. Switching regulators allow some jumper settings to be the same for two voltages of different power planes.

WARNING! Because CPU designs change rapidly, the table below is only intended as a simple guideline and thus may not be true for your CPU. Always refer to the CPU documentation for your CPU’s voltage and then set the appropriate VID jumpers according to the illustration below.

Manufacturer

CPU Type

Single Plane

 

 

Dual Plane

 

VID3

VID2

VID1

VID0

AMD (.25micron)

K6-III/400,450

----

 

 

2.4V(Dual)

 

[1-2]

 

[2-3]

[1-2]

[1-2]

 

K6-2/450,475

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AMD (.25micron)

K6-2/266,300,333

----

 

 

2.2V(Dual)

 

[1-2]

 

[1-2]

[2-3]

[1-2]

 

350,366,380,400

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

K6/233,266,300

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AMD

K5

3.5V(VRE)

 

 

 

----

 

 

[2-3]

 

[2-3]

[2-3]

[2-3]

IBM/Cyrix

6x86

3.5V(VRE)

 

 

 

----

 

 

[2-3]

 

[2-3]

[2-3]

[2-3]

IDT

WinChip2

3.5V(VRE)

 

 

 

----

 

 

[2-3]

 

[2-3]

[2-3]

[2-3]

Intel

P54C/P54CS

3.5V(VRE)

 

 

 

----

 

 

[2-3]

 

[2-3]

[2-3]

[2-3]

AMD

K5

3.4V(STD)

 

 

 

----

 

 

[2-3]

 

[2-3]

[2-3]

[1-2]

Intel

P54C/P54CS

3.4V(STD)

 

 

 

---

 

 

[2-3]

 

[2-3]

[2-3]

[1-2]

AMD (.35micron)

K6-233

----

 

 

3.2V(Dual)

 

[2-3]

 

[2-3]

[1-2]

[1-2]

AMD (.35micron)

K6-166,200

----

 

 

2.9V(Dual)

 

[2-3]

 

[1-2]

[1-2]

[2-3]

IBM/Cyrix

6x86MX

----

 

 

2.9V(Dual)

 

[2-3]

 

[1-2]

[1-2]

[2-3]

Intel

P55C-MMX

----

 

 

2.8V(Dual)

 

[2-3]

 

[1-2]

[1-2]

[1-2]

 

 

1

2

3

1

2

3

1

2

3

1

2

3

1

2

3

1

2

3

 

 

VID3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VID2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VID1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VID0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.0Volts

2.1Volts

2.2Volts

2.3Volts

2.4Volts

2.8Volts

 

 

1

2

3

1

2

3

1

2

3

1

2

3

1

2

3

1

2

3

 

 

VID3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VID2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VID1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VID0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.9Volts

3.0Volts

3.1Volts

3.2Volts

3.3Volts

3.4Volts

 

 

1

2

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VID3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VID2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P5A-VM CPU Core Voltage Selection VID1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VID0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3.5Volts

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

18

ASUS P5A-VM User’s Manual