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M725

PC CHIPS MAUNFACTURING, LTD.

M725

Device Type

Mainboard

Processor

Pentium II

Processor Speed

233/266/300/333MHz

Chip Set

Intel

Maximum Onboard Memory

384MB (EDO & SDRAM supported)

Cache

256/512KB (located on the Pentium II CPU)

BIOS

AMI

Dimensions

220mm x 220mm

I/O Options

32-bit PCI slots (3), floppy drive interface, IDE interfaces (2), parallel port, PS/2 mouse port, PS/2 mouse interface, serial ports (2), ATX power connector, AGP slot, audio in CD-ROMs (2)

CONNECTIONS

Purpose

Location

Purpose

Location

AGP slot

AGP

Sound and Game Header

J3

ATX power connector

ATX

ATX form card connector

J4

Audio in CD-ROM

CD1

Speaker

J5/pins 1, 3, 5, 7

Audio in CD-ROM

CD2

Power LED & keylock

J5/pins 2, 4, 6, 8, 10

Serial port 1

COM1

Turbo LED

J5/pins 13 & 14

Serial port 2

COM2

IDE interface LED

J5/pins 15 & 16

CPU fan power

FAN1

Reset switch

J5/pins 17 & 18

Floppy drive interface

FDC1

Green PC LED

J5/pins 19 & 20

IDE interface 1

IDE1

32-bit PCI slots

PC1 - PC3

IDE interface 2

IDE2

Parallel port

PRN1

Digital audio out

J1

PS/2 mouse interface

PS1

Digital audio in

J2

PS/2 mouse port

PS2

USER CONFIGURABLE SETTINGS

Function

Label

Position

 

Sound pro enabled

JP1

Pins 2 & 3 closed

 

Sound pro disabled

JP1

Pins 1 & 2 closed

Microphone type select standard

JP2

Open

 

Microphone type select special

JP2

Closed

CMOS memory normal operation

JP10

Pins 1 & 2 closed

 

CMOS memory clear

JP10

Pins 2 & 3 closed

DIMM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

8 MB

1 M x 64

None

None

16 MB

1 M x 64

1 M x 64

None

16 MB

2 M x 64

None

None

24 MB

1 M x 64

1 M x 64

1 M x 64

32 MB

2 M x 64

2 M x 64

None

32 MB

4 M x 64

None

None

40 MB

2 M x 64

2 M x 64

1 M x 64

48 MB

2 M x 64

2 M x 64

2 M x 64

64 MB

4 M x 64

4 M x 64

None

64 MB

8 M x 64

None

None

80 MB

4 M x 64

4 M x 64

2 M x 64

96 MB

4 M x 64

4 M x 64

4 M x 64

128 MB

8 M x 64

8 M x 64

None

128 MB

16 M x 64

None

None

130 MB

8 M x 64

8 M x 64

4 M x 64

192 MB

8 M x 64

8 M x 64

8 M x 64

256 MB

16 M x 64

16 M x 64

None

320 MB

16 M x 64

16 M x 64

8 M x 64

384 MB

16 M x 64

16 M x 64

16 M x 64

DIMM VOLTAGE CONFIGURATION

Voltage

JP5A

JP5B

3.3v

Pins 2 & 3 closed

Pins 2 & 3 closed

 

5v

Pins 1 & 2 closed

Pins 1 & 2 closed

CACHE CONFIGURATION

Note: The cache is located on the Pentium II CPU.

CPU FREQUENCY SELECTION

Frequency

JP7

66MHz

Pins 2 & 3 closed

CPU MULTIPLIER SELECTION

Multiplier

JP3A

JP3B

JP3C

JP3D

1.5x

Open

Open

Closed

Open

2x

Closed

Closed

Closed

Closed

2x

Open

Open

Open

Open

2.5x

Open

Closed

Closed

Closed

3x

Closed

Closed

Open

Closed

3.5x

Open

Closed

Open

Closed

4x

Closed

Closed

Closed

Open

4.5x

Open

Closed

Closed

Open

5x

Closed

Closed

Open

Open

5.5x

Open

Closed

Open

Open

6x

Closed

Open

Closed

Closed

6.5x

Open

Open

Closed

Closed

7x

Closed

Open

Open

Closed

7.5x

Open

Open

Open

Closed

8x

Closed

Open

Closed

Open