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ATLAS PCI-III

AMERICAN MEGATRENDS, INC.

ATLAS PCI-III

Device Type

Mainboard

Processor

AM K5/AM K6/Pentium

Processor Speed

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

Chip Set

Intel

Video Chip Set

None

Maximum Onboard Memory

256MB (EDO supported)

Maximum Video Memory

None

Cache

256/512KB

BIOS

AMI

Dimensions

330mm x 218mm

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), VRM connector, USB connectors (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

CPU fan power

J13

IDE interface 1

P5

Reset switch

J20

Power connector

P6

IDE interface LED

J21

Auxiliary power connector

P8

Green PC connector

J22

IDE interface 2

P9

Speaker

J23

32-bit PCI slots

PC1 – PC4

Power LED & keylock

J24

PS/2 mouse interface

PS2

Serial port 1

P1

USB connector 1

USB1

Serial port 2

P2

USB connector 2

USB2

Floppy drive interface

P3

VRM connector

VRM

Parallel port

P4

   

USER CONFIGURABLE SETTINGS

Function

Label

Position

»

Factory configured - do not alter

J2

Closed

»

Factory configured - do not alter

J3

Open

 

PCI bus clock speed select 33MHz/66MHz

J15

Pins 1 & 2 closed

 

PCI bus clock speed select 25MHz/75MHz

J15

Pins 2 & 3 closed

»

CMOS memory normal operation

J18

Open

 

CMOS memory clear

J18

Closed

 

PS/2 mouse IRQ12 enabled

J19

Pins 2 & 3 closed

 

PS/2 mouse IRQ12 disabled

J19

Pins 1 & 2 closed

SIMM 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) 2M x 36

(2) 1M 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) 4M x 36

(2) 2M x 36

64MB

(2) 8M x 36

None

64MB

(2) 4M x 36

(2) 4M x 36

72MB

(2) 8M x 36

(2) 1M x 36

80MB

(2) 8M x 36

(2) 2M x 36

96MB

(2) 8M x 36

(2) 4M x 36

128MB

(2) 8M x 36

(2) 8M x 36

128MB

(2) 16M x 36

None

SIMM CONFIGURATION (CON’T)

Size

Bank 0

Bank 1

136MB

(2) 16M x 36

(2) 1M x 36

144MB

(2) 16M x 36

(2) 2M x 36

160MB

(2) 16M x 36

(2) 4M x 36

192MB

(2) 16M x 36

(2) 8M x 36

256MB

(2) 16M x 36

(2) 16M x 36

Note: Board accepts EDO memory.

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

256KB

(2) 32K x 32

None

(1) 32K x 8

512KB

(2) 32K x 32

(2) 32K x 32

(1) 32K x 8

Note: The location of banks 0 & 1 and the TAG is unidentified.

CACHE JUMPER CONFIGURATION

Size

J1

J9

J10

J11

J12

256KB

Open

1 & 2

1 & 2

1 & 2

1 & 2

512KB

Closed

2 & 3

2 & 3

2 & 3

2 & 3

Note: Pins designated should be in the closed position.

CPU SPEED SELECTION

CPU speed

Clock speed

Multiplier

J5

J6

J7

J8

75MHz

50MHz

1.5x

Closed

Closed

Open

Open

90MHz

60MHz

1.5x

Closed

Open

Open

Open

100MHz

50MHz

1.5x

Open

Closed

Open

Open

120MHz

60MHz

2x

Closed

Open

Open

Closed

133MHz

66MHz

2x

Open

Closed

Open

Closed

150MHz

60MHz

2.5x

Closed

Open

Closed

Closed

166MHz

66MHz

2.5x

Open

Closed

Closed

Closed

180MHz

60MHz

3x

Closed

Open

Closed

Open

200MHz

66MHz

3x

Open

Closed

Closed

Open

CPU VOLTAGE SELECTION

Voltage

J14

»

NO VRM module installed

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

 

2.8v VRM installed

Open

 

3.1v VRM installed

Open