III. INSTALLATION

Compatible Cyrix CPU Identification

The only Cyrix CPU that is supported on this motherboard is labeled Cyrix 6x86 PR166+ but 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.

3.Voltage Regulator Output Selection (VID0, 1, 2, 3)

These jumpers set the voltage supplied to the CPU. The voltage regulators will auto- matically detect and switch between Single Power Plane & Dual Power Planes.

INSTALLATION .III (Jumpers)

Pentium MMX (P55C) Intel Pentium (P54C)

AMD-K6

AMD-K5

IBM/Cyrix 6x86(MX)

IBM/Cyrix 6x86(M1)

(150MHz-233MHz) (75MHz-200MHz)

(PR166 and faster)

(PR75-PR133)

(PR166 and faster)

(PR166 and faster)

Manufacturer

CPU Type

Single Plane

Dual Plane

VID3

VID2

VID1

VID0

Intel/AMD/IBM/Cyrix

P54C/CS/K5/M1

3.5V(VRE)

----

[----]

[2-3]

[2-3]

[1-2]

AMD

K6-PR166,200

----

2.9 Volts

 

 

 

 

Intel/AMD

P54C/CS/K5

3.4V(STD)

----

[----]

[2-3]

[2-3]

[2-3]

Intel/IBM/Cyrix

P55C/6x86MX

----

2.8 Volts

 

 

 

 

AMD

K6-PR233

----

3.2 Volts

[----]

[1-2]

[2-3]

[2-3]

 

 

VID3 VID2 VID1 VID0

VID3 VID2 VID1 VID0

VID3 VID2

VID1 VID0

 

 

 

 

 

1

1

1

 

 

 

 

 

2

2

2

 

 

 

 

 

3

3

3

 

 

 

 

1.8 Volts

1.9 Volts

2.5 Volts

 

 

 

 

 

1

1

1

 

 

 

 

 

2

2

2

 

 

 

 

 

3

3

3

 

 

 

 

2.7 Volts

2.8 Volts

2.9 Volts

 

 

Voltage Regulator Output Selection

 

1

1

1

 

 

 

2

2

2

 

 

 

 

 

3

3

3

 

 

 

 

3.2 Volts

3.4 V *

3.5 V

*

 

 

 

 

 

*Setting these two jumpers’ VID1 to

 

 

 

 

 

[2-3] or [----] (removed) will result in

 

 

the same voltages, respectively.

16

ASUS TXP4-X User’s Manual