VEXTREC TECHNOLOGY, INC.

GMB-P56IPA (VER. 1.01)

Device Type

Mainboard

Processor

CX 6X68/AM K5/Pentium/Pentium MMX

Processor Speed

75/90/100/120/133/150/166/180/200MHz

Chip Set

Intel 430VX

Video Chip Set

S3

Maximum Onboard Memory

128MB (EDO & SDRAM supported)

Maximum Video Memory

2MB

Cache

256/512KB

BIOS

AMI/Award

I/O Options

IDE interfaces (2), floppy drive interface, parallel port, PS/2 mouse port, serial ports (2), VGA port, VGA feature connector, cache slot, expansion slot, IR connector, USB connectors (2), FIR connector, MPEG module connector, green PC connector

Dimensions

200mm x 320mm

CONNECTIONS

Purpose

Location

Purpose

Location

Reset switch

J1

VGA port

J14

Green PC connector

J2

Parallel port

J15

Suspend LED

J3

Serial port 1

J16

Speaker

J4

Serial port 2

J17

IDE interface LED

J5

USB connector 1

J18

Power LED & keylock

J6

USB connector 2

J19

IDE interface 1

J7

FIR connector

J20

IDE interface 2

J8

IR connector

J21

Floppy drive interface

J9

PS/2 mouse port

J22

VGA feature connector

J12

Expansion slot

SL1

S3 MPEG module upgrade connector

J13

Cache slot

SL2

USER CONFIGURABLE SETTINGS

 

S3 MPEG Module not installed

JP8

Open

 

S3 MPEG Module installed

JP8

Closed

»

CMOS memory normal operation

JP9

Open

 

CMOS memory clear

JP9

Closed

 

Flash BIOS voltage select 12v

JP13

Pins 1 & 2 closed

 

Flash BIOS voltage select 5v

JP13

Pins 2 & 3 closed

 

On board VGA enabled

JP14

Closed

 

On board VGA disabled

JP14

Open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

8MB

(2) 1MB x 36

None

None

16MB

(2) 1MB x 36

(2) 1MB x 36

None

16MB

(2) 2MB x 36

None

None

24MB

(2) 1MB x 36

(2) 1MB x 36

(1) 1MB x 64

24MB

(2) 2MB x 36

(2) 1MB x 36

None

32MB

(2) 2MB x 36

(2) 2MB x 36

None

32MB

(2) 4MB x 36

None

None

40MB

(2) 2MB x 36

(2) 2MB x 36

(1) 1MB x 64

40MB

(2) 4MB x 36

(2) 1MB x 36

None

48MB

(2) 2MB x 36

(2) 2MB x 36

(1) 2MB x 64

48MB

(2) 4MB x 36

(2) 2MB x 36

None

64MB

(2) 4MB x 36

(2) 4MB x 36

None

64MB

(2) 8MB x 36

None

None

72MB

(2) 4MB x 36

(2) 4MB x 36

(1) 1MB x 64

72MB

(2) 8MB x 36

(2) 1MB x 36

None

80MB

(2) 4MB x 36

(2) 4MB x 36

(1) 2MB x 64

80MB

(2) 8MB x 36

(2) 2MB x 36

None

96MB

(2) 4MB x 36

(2) 4MB x 36

(1) 4MB x 64

96MB

(2) 8MB x 36

(2) 4MB x 36

None

128MB

(2) 8MB x 36

(2) 8MB x 36

None

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

256KB

(2) 32K x 36

None

(1) 8K/16K/32K x 8

512KB

(2) 32K x 36

256K module installed at SL2

(1) 8K/16K/32K x 8

VIDEO MEMORY CONFIGURATION

Size

Bank 0

Bank 1

1MB

(2) 256KB x 16

None

2MB

(2) 256KB x 16

(2) 256KB x 16

CPU SPEED SELECTION (CX 6X86)

Speed

Clock speed

Multiplier

JP4

JP5

S1

S2

S3

120MHz

60MHz

2x

1 & 2

2 & 3

Closed

Closed

Open

133MHz

66MHz

2x

1 & 2

2 & 3

Open

Closed

Open

150MHz

60MHz

2.5x

1 & 2

2 & 3

Closed

Open

Open

166MHz

66MHz

2.5x

1 & 2

2 & 3

Open

Open

Open

200MHz

66MHz

3x

1 & 2

2 & 3

Open

Open

Closed

Note: Designated pins should be in the closed position. Settings are with clock generator installed on U8.

CPU SPEED SELECTION (AM K5)

Speed

Clock speed

Multiplier

JP4

JP5

S1

S2

S3

75MHz

50MHz

1.5x

1 & 2

1 & 2

Closed

Closed

Open

90MHz

60MHz

1.5x

1 & 2

1 & 2

Closed

Open

Open

100MHz

66MHz

1.5x

1 & 2

1 & 2

Open

Open

Open

120MHz

60MHz

2x

1 & 2

1 & 2

Closed

Open

Open

133MHz

66MHz

2x

1 & 2

1 & 2

Open

Open

Open

150MHz

60MHz

2.5x

1 & 2

2 & 3

Closed

Open

Open

166MHz

66MHz

2.5x

1 & 2

2 & 3

Open

Open

Open

Note: Designated pins should be in the closed position. Settings are with clock generator installed on U8.

CPU SPEED SELECTION (PENTIUM)

Speed

Clock speed

Multiplier

JP4

JP5

S1

S2

S3

75MHz

50MHz

1.5x

1 & 2

1 & 2

Closed

Closed

Open

90MHz

60MHz

1.5x

1 & 2

1 & 2

Closed

Open

Open

100MHz

66MHz

1.5x

1 & 2

1 & 2

Open

Open

Open

120MHz

60MHz

2x

1 & 2

2 & 3

Closed

Open

Open

133MHz

66MHz

2x

1 & 2

2 & 3

Open

Open

Open

150MHz

60MHz

2.5x

2 & 3

2 & 3

Closed

Open

Open

166MHz

66MHz

2.5x

2 & 3

2 & 3

Open

Open

Open

180MHz

60MHz

3x

2 & 3

1 & 2

Closed

Open

Open

200MHz

66MHz

3x

2 & 3

1 & 2

Open

Open

Open

Note: Designated pins should be in the closed position. Settings are with clock generator installed on U8.

CPU SPEED SELECTION (PENTIUM MMX)

Speed

Clock speed

Multiplier

JP4

JP5

S1

S2

S3

150MHz

60MHz

2.5x

2 & 3

2 & 3

Closed

Open

Open

166MHz

66MHz

2.5x

2 & 3

2 & 3

Open

Open

Open

180MHz

60MHz

3x

2 & 3

1 & 2

Closed

Open

Open

200MHz

66MHz

3x

2 & 3

1 & 2

Open

Open

Open

Note: Designated pins should be in the closed position. Settings are with clock generator installed on U8.

ALTERNATE CPU SPEED SELECTION (CX 6X86)

Speed

Clock speed

Multiplier

JP4

JP5

S1

S2

S3

120MHz

50MHz

2x

1 & 2

2 & 3

Closed

Closed

Closed

133MHz

55MHz

2x

1 & 2

2 & 3

Closed

Closed

Open

150MHz

60MHz

2x

1 & 2

2 & 3

Closed

Open

Open

166MHz

66MHz

2x

1 & 2

2 & 3

Open

Open

Open

200MHz

66MHz

2.5x

1 & 2

2 & 3

Open

Closed

Open

Note: Designated pins should be in the closed position. Settings are with clock generator installed on U7.

ALTERNATE CPU SPEED SELECTION (AM K5)

Speed

Clock speed

Multiplier

JP4

JP5

S1

S2

S3

75MHz

50MHz

1.5x

1 & 2

1 & 2

Closed

Closed

Closed

90MHz

60MHz

1.5x

1 & 2

1 & 2

Closed

Open

Open

100MHz

66MHz

1.5x

1 & 2

1 & 2

Open

Open

Open

120MHz

60MHz

2x

1 & 2

1 & 2

Closed

Open

Open

133MHz

66MHz

2x

1 & 2

1 & 2

Open

Open

Open

150MHz

60MHz

2.5x

1 & 2

2 & 3

Closed

Open

Open

166MHz

66MHz

2.5x

1 & 2

2 & 3

Open

Open

Open

Note: Designated pins should be in the closed position. Settings are with clock generator installed on U7.

ALTERNATE CPU SPEED SELECTION (PENTIUM)

Speed

Clock speed

Multiplier

JP4

JP5

S1

S2

S3

75MHz

50MHz

1.5x

1 & 2

1 & 2

Closed

Closed

Closed

90MHz

60MHz

1.5x

1 & 2

1 & 2

Closed

Open

Open

100MHz

66MHz

1.5x

1 & 2

1 & 2

Open

Open

Open

120MHz

60MHz

2x

1 & 2

2 & 3

Closed

Open

Open

133MHz

66MHz

2x

1 & 2

2 & 3

Open

Open

Open

150MHz

60MHz

2.5x

2 & 3

2 & 3

Closed

Open

Open

166MHz

66MHz

2.5x

2 & 3

2 & 3

Open

Open

Open

180MHz

60MHz

3x

2 & 3

1 & 2

Closed

Open

Open

200MHz

66MHz

3x

2 & 3

1 & 2

Open

Open

Open

Note: Designated pins should be in the closed position. Settings are with clock generator installed on U7.

ALTERNATE CPU SPEED SELECTION (PENTIUM MMX)

Speed

Clock speed

Multiplier

JP4

JP5

S1

S2

S3

150MHz

60MHz

2.5x

2 & 3

2 & 3

Closed

Open

Open

166MHz

66MHz

2.5x

2 & 3

2 & 3

Open

Open

Open

180MHz

60MHz

3x

2 & 3

1 & 2

Closed

Open

Open

200MHz

66MHz

3x

2 & 3

1 & 2

Open

Open

Open

Note: Designated pins should be in the closed position. Settings are with clock generator installed on U7.

CPU VOLTAGE SELECTION (SINGLE)

Voltage

Q2

JP3

S4

S5

S6

3.4v

2 transistors installed

Closed

N/A

N/A

N/A

3.4v

1 transistor installed

Closed

Closed

Closed

Closed

3.5v

2 transistors installed

Open

N/A

N/A

N/A

3.5v

1 transistors installed

Open

Closed

Closed

Closed

CPU VOLTAGE SELECTION (DUAL)

Voltage

Vcore

Q2

JP3

S4

S5

S6

3.4v

2.9v

2 transistors installed

Closed

Open

Open

Open