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MB5685

ANTEC, INC.

MB5685

Processor

CX M1/IBM/AM K5/AM K6/Pentium

Processor Speed

75/90/100/120/125/133/150/166/200/233MHz

Chip Set

Intel

Video Chip Set

None

Maximum Onboard Memory

256MB (EDO supported)

Maximum Video Memory

None

Cache

256/512KB

BIOS

Award

Dimensions

220mm x 220mm

I/O Options

32-bit PCI slots (4), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse interface, serial ports (2), IR connector, USB connectors (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Floppy drive interface

CN1

PS/2 mouse interface

J99

Serial port 1

CN2

Chassis fan power

JP1

Serial port 2

CN3

IR connector

JP3

Parallel port

CN4

Reset switch

JP12

IDE interface 1

J6

Green PC connector

JP15

IDE interface 2

J7

IDE interface LED

JP22

USB connector

J10

Green PC LED

JP33

USB connector

J11

32-bit PCI slots

PC1 PC4

Speaker

J12

Cache slot

SL1

Power LED & keylock

J14

   

USER CONFIGURABLE SETTINGS

Function

Label

Position

 

Flash BIOS voltage select 12v

JP19

Pins 1 & 2 closed

 

Flash BIOS voltage select 5v

JP19

Pins 2 & 3 closed

CMOS memory normal operation

JP40

Pins 2 & 3 closed

 

CMOS memory clear

JP40

Pins 1 & 2 closed

Factory configured - do not alter

JP42

Unidentified

DRAM CONFIGURATION

Size

Bank 0

Bank 1

8MB

(2) 1M x 36

None

16MB

(2) 2M x 36

None

16MB

(2) 1M x 36

(2) 1M x 36

24MB

(2) 1M x 36

(2) 2M x 36

32MB

(2) 4M x 36

None

32MB

(2) 2M x 36

(2) 2M x 36

40MB

(2) 4M x 36

(2) 1M x 36

48MB

(2) 2M x 36

(2) 4M x 36

64MB

(2) 8M x 36

None

64MB

(2) 4M x 36

(2) 4M x 36

72MB

(2) 1M x 36

(2) 8M x 36

80MB

(2) 2M x 36

(2) 8M x 36

96MB

(2) 4M x 36

(2) 8M x 36

128MB

(2) 8M x 36

(2) 8M x 36

128MB

(2) 16M x 36

None

136MB

(2) 1M x 36

(2) 16M x 36

144MB

(2) 2M x 36

(2) 16M x 36

160MB

(2) 4M x 36

(2) 16M x 36

192MB

(2) 8M x 36

(2) 16M x 36

256MB

(2) 16M x 36

(2) 16M x 36

Note: Board accepts EDO memory. Do not install SIMMs & DIMMs at the same time.

DIMM CONFIGURATION

Size

Bank 0

Bank 1

8MB

(1) 1M x 64

None

16MB

(1) 2M x 64

None

16MB

(1) 1M x 64

(1) 1M x 64

24MB

(1) 1M x 64

(1) 2M x 64

32MB

(1) 4M x 64

None

32MB

(1) 2M x 64

(1) 2M x 64

40MB

(1) 1M x 64

(1) 4M x 64

48MB

(1) 4M x 64

(1) 2M x 64

64MB

(1) 8M x 64

None

64MB

(1) 4M x 64

(1) 4M x 64

72MB

(1) 1M x 64

(1) 8M x 64

80MB

(1) 2M x 64

(1) 8M x 64

96MB

(1) 4M x 64

(1) 8M x 64

128MB

(1) 8M x 64

(1) 8M x 64

128MB

(1) 16M x 64

None

136MB

(1) 1M x 64

(1) 16M x 64

144MB

(1) 2M x 64

(1) 16M x 64

160MB

(1) 4M x 64

(1) 16M x 64

192MB

(1) 8M x 64

(1) 16M x 64

256MB

(1) 16M x 64

(1) 16M x 64

CACHE CONFIGURATION

Size

Bank 0

SL1

256KB

(2) 32K x 32

Not installed

512KB

(2) 32K x 32

256KB module installed

CACHE JUMPER CONFIGURATION

Size

JP29

JP30

256KB

Pins 1 & 2 closed

Pins 2 & 3 closed

512KB

Pins 2 & 3 closed

Pins 1 & 2 closed

CPU SPEED SELECTION (CYRIX)

CPU speed

Clock speed

Multiplier

JP23

JP24

JP36

120MHz

50MHz

2x

1 & 2

2 & 3

1 & 2, 3 & 4, 5 & 6

133MHz

55MHz

2x

1 & 2

2 & 3

1 & 2, 5 & 6

150MHz

60MHz

2x

1 & 2

2 & 3

1 & 2, 3 & 4

166MHz

66MHz

2x

1 & 2

2 & 3

3 & 4, 5 & 6

Note: Pins designated should be in the closed position.

CPU SPEED SELECTION (IBM)

CPU speed

Clock speed

Multiplier

JP23

JP24

JP36

120MHz

50MHz

2x

1 & 2

2 & 3

1 & 2, 3 & 4, 5 & 6

133MHz

55MHz

2x

1 & 2

2 & 3

1 & 2, 5 & 6

150MHz

60MHz

2x

1 & 2

2 & 3

1 & 2, 3 & 4

166MHz

66MHz

2x

1 & 2

2 & 3

3 & 4, 5 & 6

Note: Pins designated should be in the closed position.

CPU SPEED SELECTION (AMD)

CPU speed

Clock speed

Multiplier

JP23

JP24

JP36

75MHz

50MHz

1.5x

2 & 3

2 & 3

1 & 2, 3 & 4, 5 & 6

90MHz

60MHz

1.5x

2 & 3

2 & 3

1 & 2, 3 & 4

100MHz

66MHz

1.5x

2 & 3

2 & 3

3 & 4, 5 & 6

120MHz

60MHz

1.5x

2 & 3

2 & 3

1 & 2, 3 & 4

133MHz

66MHz

1.5x

2 & 3

2 & 3

3 & 4, 5 & 6

150MHz

60MHz

1.75x

1 & 2

1 & 2

1 & 2, 3 & 4

166MHz

66MHz

1.75x

1 & 2

1 & 2

3 & 4, 5 & 6

166MHz

66MHz

2.5x

1 & 2

1 & 2

3 & 4, 5 & 6

200MHz

66MHz

3x

2 & 3

1 & 2

3 & 4, 5 & 6

233MHz

66MHz

3.5x

2 & 3

2 & 3

3 & 4, 5 & 6

Note: Pins designated should be in the closed position.

CPU SPEED SELECTION (INTEL)

CPU speed

Clock speed

Multiplier

JP23

JP24

JP36

75MHz

50MHz

1.5x

2 & 3

2 & 3

1 & 2, 3 & 4, 5 & 6

90MHz

60MHz

1.5x

2 & 3

2 & 3

1 & 2, 3 & 4

100MHz

66MHz

1.5x

2 & 3

2 & 3

3 & 4, 5 & 6

120MHz

60MHz

2x

1 & 2

2 & 3

1 & 2, 3 & 4

125MHz

50MHz

2.5x

1 & 2

1 & 2

1 & 2, 3 & 4, 5 & 6

133MHz

66MHz

2x

1 & 2

2 & 3

3 & 4, 5 & 6

150MHz

60MHz

2.5x

1 & 2

1 & 2

1 & 2, 3 & 4

166MHz

66MHz

2.5x

1 & 2

1 & 2

3 & 4, 5 & 6

200MHz

66MHz

3x

2 & 3

1 & 2

3 & 4, 5 & 6

233MHz

66MHz

3.5x

2 & 3

2 & 3

3 & 4, 5 & 6

Note: Pins designated should be in the closed position.

CPU VOLTAGE SELECTION (SINGLE)

Voltage

J100

J101

J103

3.34v

3 & 4

1 & 3, 2 & 4

1 & 3

3.58v

3 & 4

1 & 3, 2 & 4

1 & 3, 2 & 4

Note: Pins designated should be in the closed position.

CPU VOLTAGE SELECTION (DUAL)

Voltage

V core

J100

J101

J103

3.3v

2.86v

3 & 4

3 & 5, 4 & 6

Open

3.3v

2.97

3 & 4

3 & 5, 4 & 6

2 & 4

3.3v

3.15

3 & 4

3 & 5, 4 & 6

3 & 4

Note: Pins designated should be in the closed position.

VOLTAGE FINE TUNE SELECTION

Setting

JP43

V core normal voltage

Closed

V core voltage increase by 2.5%

Open