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SY-5EHM

SOYO COMPUTER CO., LTD.

SY-5EHM

Device Type

Mainboard

Processor

CX 6X86/CX 6X86L/CX 686MX/AM K5/AM K6/

AM K6-2/Pentium/Pentium MMX

Processor Speed

90/100/120/133/150/166/180/200/233/250/266Hz

Chip Set

VIA MVP3

Video Chip Set

None

Maximum Onboard Memory

128MB (EDO & SDRAM supported)

Maximum Video Memory

None

Cache

512/1024KB

BIOS

Award

Dimensions

254mm x 218mm

I/O Options

32-bit PCI slots (3), floppy drive interface, IDE interfaces (2), parallel port, PS/2 mouse interface, serial ports (2), IR connector, USB connector, ATX power connector, AGP slot, wake on LAN connector

CONNECTIONS

Purpose

Location

Purpose

Location

AGP slot

AGP

Reset switch

J25A

ATX power connector

ATX

Soft off power supply

J25B

Parallel port

CN1

Turbo LED

J25C

Serial port 1

CN2

IDE interface LED

J25D

Serial port 2

CN3

Power LED & keylock

J25E

IDE interface 1

CN4

Speaker

J25F

IDE interface 2

CN5

CPU fan power

JP12

Floppy drive interface

CN6

Wake on LAN connector

JP44

PS/2 mouse interface

CN7

32-bit PCI slots

PC1 – PC3

IR connector

IR1

USB connector

USB

USER CONFIGURABLE SETTINGS

Function

Label

Position

 

CPU voltage select auto

JP4

Closed

 

CPU voltage select manual

JP4

Open

»

CMOS memory normal operation

JP5

Pins 1 & 2 closed

 

CMOS memory clear

JP5

Pins 2 & 3 closed

 

CPU burst mode select interleave

JP22

Pins 1 & 2 closed

 

CPU burst mode select linear

JP22

Pins 2 & 3 closed

SIMM CONFIGURATION

Size

Bank 0

8MB

(2) 1M x 36

16MB

(2) 2M x 36

32MB

(2) 4M x 36

64MB

(2) 8M x 36

Note: Board accepts EDO memory.

DIMM CONFIGURATION

Size

Bank 1

Bank 2

8MB

(1) 1M x 64

None

16MB

(1) 2M x 64

None

16MB

(1) 1M x 64

(1) 1M x 64

24MB

(1) 2M x 64

(1) 1M x 64

32MB

(1) 4M x 64

None

DIMM CONFIGURATION (CON’T)

Size

Bank 1

Bank 2

32MB

(1) 2M x 64

(1) 2M x 64

40MB

(1) 4M x 64

(1) 1M 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) 8M x 64

(1) 1M x 64

80MB

(1) 8M x 64

(1) 2M x 64

96MB

(1) 8M x 64

(1) 4M x 64

128MB

(1) 16M x 64

None

128MB

(1) 8M x 64

(1) 8M x 64

136MB

(1) 16M x 64

(1) 1M x 64

144MB

(1) 16M x 64

(1) 2M x 64

160MB

(1) 16M x 64

(1) 4M x 64

192MB

(1) 16M x 64

(1) 8M x 64

256MB

(1) 16M x 64

(1) 16M x 64

Note: Board accepts EDO & SDRAM memory.

DIMM VOLTAGE CONFIGURATION

Voltage

JP37

»

3.3v

Pins 1 & 3, 2 & 4 closed

 

5v

Pins 3 & 5, 4 & 6 closed

DIMM FREQUENCY CONFIGURATION

Frequency

JP9

JP10

»

SDRAM = CPU

Pins 2 & 3 closed

Pins 1 & 2 closed

 

SDRAM = AGP

Pins 1 & 2 closed

Pins 2 & 3 closed

CACHE CONFIGURATION

Size

Bank 0

TAG

512KB

(1) 64K x 64

(1) 16K x 8

1MB

(2) 64K x 64

(1) 16K x 8

CPU SPEED SELECTION (CX 6X86)

CPU speed

Clock speed

Multiplier

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

SW1/6

150MHz

60MHz

2x

On

Off

Off

On

Off

Off

166MHz

66MHz

2x

On

Off

Off

Off

Off

Off

200MHz

75MHz

2x

On

Off

Off

Off

On

Off

CPU SPEED SELECTION (CX 6X86L)

CPU speed

Clock speed

Multiplier

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

SW1/6

150MHz

60MHz

2x

On

Off

Off

On

Off

Off

166MHz

66MHz

2x

On

Off

Off

Off

Off

Off

200MHz

75MHz

2x

On

Off

Off

Off

On

Off

CPU SPEED SELECTION (CX 6X86MX)

CPU speed

Clock speed

Multiplier

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

SW1/6

166MHz

60MHz

2.5x

On

On

Off

On

Off

Off

200MHz

66MHz

2.5x

On

On

Off

On

Off

Off

200MHz

75MHz

2x

On

Off

Off

Off

On

Off

233MHz

75MHz

2.5x

On

On

Off

Off

On

Off

233MHz

66MHz

3x

Off

On

Off

On

Off

Off

266MHz

83MHz

2.5x

On

On

Off

On

On

Off

CPU SPEED SELECTION (AM K5)

CPU speed

Clock speed

Multiplier

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

SW1/6

90MHz

60MHz

1.5x

Off

Off

Off

On

Off

Off

100MHz

66MHz

1.5x

Off

Off

Off

Off

Off

Off

120MHz

60MHz

1.5x

Off

Off

Off

On

Off

Off

133MHz

66MHz

2x

On

Off

Off

Off

Off

Off

166MHz

66MHz

2.5x

On

On

Off

Off

Off

Off

CPU SPEED SELECTION (AM K6)

CPU speed

Clock speed

Multiplier

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

SW1/6

166MHz

66MHz

2.5x

On

On

Off

Off

Off

Off

180MHz

66MHz

3x

Off

On

Off

On

Off

Off

200MHz

66MHz

3x

Off

On

Off

Off

Off

Off

233MHz

66MHz

3.5x

Off

Off

Off

Off

Off

Off

CPU SPEED SELECTION (AM K6 2)

CPU speed

Clock speed

Multiplier

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

SW1/6

250MHz

100MHz

2.5x

On

On

Off

Off

Off

On

CPU SPEED SELECTION (INTEL)

CPU speed

Clock speed

Multiplier

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

SW1/6

90MHz

60MHz

1.5x

Off

Off

Off

On

Off

Off

100MHz

66MHz

1.5x

Off

Off

Off

Off

Off

Off

120MHz

60MHz

2x

On

Off

Off

On

Off

Off

133MHz

66MHz

2x

On

Off

Off

Off

Off

Off

150MHz

60MHz

2.5x

On

On

Off

On

Off

Off

166MHz

66MHz

2.5x

On

On

Off

Off

Off

Off

180MHz

66MHz

3x

Off

On

Off

On

Off

Off

200MHz

66MHz

3x

Off

On

Off

Off

Off

Off

CPU SPEED SELECTION (INTEL MMX)

CPU speed

Clock speed

Multiplier

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

SW1/6

166MHz

66MHz

2.5x

On

On

Off

Off

Off

Off

180MHz

66MHz

3x

Off

On

Off

On

Off

Off

200MHz

66MHz

3x

Off

On

Off

Off

Off

Off

233MHz

66MHz

3.5x

Off

Off

Off

Off

Off

Off

CPU VOLTAGE SELECTION

Voltage

JP30

2.0v

Open

2.1v

Pins 5 & 6 closed

2.2v

Pins 3 & 4 closed

2.3v

Pins 3 & 4, 5 & 6 closed

2.4v

Pins 7 & 8 closed

2.5v

Pins 5 & 6, 7 & 8 closed

2.6v

Pins 3 & 4, 7 & 8 closed

2.7v

Pins 3 & 4, 5 & 6, 7 & 8 closed

2.8v

Pins 1 & 2, 11 & 12 closed

2.9v

Pins 1 & 2, 5 & 6 closed

3.0v

Pins 1 & 2, 3 & 4 closed

3.1v

Pins 1 & 2, 3 & 4, 5 & 6 closed

3.2v

Pins 1 & 2, 7 & 8 closed

3.3v

Pins 1 & 2, 9 & 10 closed

3.4v

Pins 1 & 2, 3 & 4, 7 & 8 closed

3.5v

Pins 1 & 2, 11 & 12 closed

POWER SUPPLY SELECTION

Type

JP2

JP6

»

AT

Pins 2 & 3 closed

Pins 2 & 3 closed

 

ATX

Pins 1 & 2 closed

Pins 1 & 2 closed

HOST BUS FREQUENCY SELECTION

CPU host bus

AGP host bus

PCI hose bus

JP7

JP8

»

66MHz

66MHz

33MHz

Pins 2 & 3 closed

Open

 

100MHz

66MHz

33MHz

Pins 1 & 2 closed

Pins 2 & 3 closed