PR5B (REV. 1.01) Motherboard Settings and Configuration

ABIT COMPUTER CORPORATION

PR5B (REV. 1.01)

Processor
CX M1/AM K5/Pentium
Processor Speed
75/90/100/120/133/150/166/200MHz
Chip Set
Intel
Video Chip Set
None
Maximum Onboard Memory
128MB (EDO supported)
Maximum Video Memory
None
Cache
256/512KB
BIOS
Award
Dimensions
330mm x 218mm
I/O Options
32-bit PCI slots (3), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), cache slot, IR connector, USB connector
NPU Options
None

CONNECTIONS
Purpose
Location
Purpose
Location
Serial port 1
CN1
Reset switch
J6 pins 1 & 2
Serial port 2
CN2
Green PC connector
J6 pins 6 & 7
Parallel port
CN3
Turbo LED
J6 pins 8 & 9
Floppy drive interface
CN4
Speaker
J6 pins 11 - 14
IDE interface 2
CN5
Power LED & keylock
J6 pins 16 - 20
IDE interface 1
CN6
IR connector
JP2
USB connector
CN7
Chassis fan power
JP9
PS/2 mouse port
J4
32-bit PCI slots
PC1 - PC3
IDE interface LED
J5
Cache slot
SL1

USER CONFIGURABLE SETTINGS
Function
Label
Position
»
Factory configured - do not alter
DS8
Off
»
Factory configured - do not alter
J1
Unidentified
»
CMOS memory normal operation
JP3
Pins 1 & 2 closed

CMOS memory clear
JP3
Pins 2 & 3 closed

Flash BIOS voltage select 12v
JP8
Pins 2 & 3 closed

Flash BIOS voltage select 5v
JP8
Pins 1 & 2 closed
Note: JP8 may not be present on all boards.

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) 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
Note: Board accepts EDO memory.

CACHE CONFIGURATION
Size
Bank 0
SL1
256KB (A)
(2) 32K x 32
Not installed
256KB (B)
None
256KB module installed
512KB (A)
(2) 32K x 32
256KB module installed
512KB (B)
(2) 64K x 32
Not installed
512KB (C)
None
512KB module installed

CACHE JUMPER CONFIGURATION
Size
JP1
None
Open
256KB (A)
Open
256KB (B)
Open
512KB (A)
Closed
512KB (B)
Open
512KB (C)
Closed

CPU SPEED SELECTION (CYRIX PLL52C61-01 OR PLL52C61-21 CLOCK)
CPU speed
Clock speed
Multiplier
DS/1
DS/2
DS/3 N
DS/3 T
DS/4N
120MHz
50MHz
2x
Off
On
On
N/A
On
133MHz
55MHz
2x
Off
On
On
N/A
Off
150MHz
60MHz
2x
Off
On
On
Off
On
166MHz
66MHz
2x
Off
On
Off
Off
On
200MHz
75MHz
2x
Off
On
On
N/A
Off
Note: N = normal mode. T = turbo mode.

CPU SPEED SELECTION (CYRIX PLL52C61-01 OR PLL52C61-21 CLOCK, CON’T)
CPU speed
Clock speed
Multiplier
DS/4 T
DS/5
DS/6
DS/7 N
DS/7 T
120MHz
50MHz
2x
N/A
Off
Off
On
N/A
133MHz
55MHz
2x
N/A
On
Off
On
N/A
150MHz
60MHz
2x
Off
On
Off
Off
On
166MHz
66MHz
2x
Off
On
Off
On
Off
200MHz
75MHz
2x
N/A
On
Off
Off
N/A
Note: N = normal mode. T = turbo mode.

CPU SPEED SELECTION (CYRIX PLL52C59-14T OR ICS9159-14 CLOCK)
CPU speed
Clock speed
Multiplier
DS/1
DS/2
DS/3
DS/4
120MHz
50MHz
2x
Off
On
On
On
133MHz
55MHz
2x
Off
On
Off
Off
150MHz
60MHz
2x
Off
On
Off
On
166MHz
66MHz
2x
Off
On
On
Off
200MHz
75MHz
2x
Off
On
Off
Off

CPU SPEED SELECTION (CYRIX PLL52C59-14T OR ICS9159-14 CLOCK, CON’T)
CPU speed
Clock speed
Multiplier
DS/5
DS/6
DS/7 N
DS/7 T
120MHz
50MHz
2x
Off
Off
Off
On
133MHz
55MHz
2x
On
Off
Off
N/A
150MHz
60MHz
2x
On
Off
Off
On
166MHz
66MHz
2x
On
Off
Off
On
200MHz
75MHz
2x
On
Off
On
N/A
Note: N = normal mode. T = turbo mode.

CPU SPEED SELECTION (AMD PLL52C61-01 OR PLL52C61-21 CLOCK)
CPU speed
Clock speed
Multiplier
DS/1
DS/2
DS/3 N
DS/3 T
DS/4N
75MHz
50MHz
1.5x
Off
Off
On
N/A
On
90MHz
60MHz
1.5x
Off
Off
On
Off
On
100MHz
66MHz
1.5x
Off
Off
Off
Off
On
90MHz
60MHz
1.5x
Off
Off
On
Off
On
100MHz
66MHz
1.5x
Off
Off
Off
Off
On
120MHz
60MHz
2x
Off
On
On
Off
On
133MHz
66MHz
2x
Off
On
Off
Off
On
Note: N = normal mode. T = turbo mode.

CPU SPEED SELECTION (AMD PLL52C61-01 OR PLL52C61-21 CLOCK, CON’T)
CPU speed
Clock speed
Multiplier
DS/4 T
DS/5
DS/6
DS/7 N
DS/7 T
75MHz
50MHz
1.5x
N/A
Off
Off
On
N/A
90MHz
60MHz
1.5x
Off
On
Off
Off
On
100MHz
66MHz
1.5x
Off
On
Off
On
Off
90MHz
60MHz
1.5x
Off
On
Off
Off
On
100MHz
66MHz
1.5x
Off
On
Off
On
Off
120MHz
60MHz
2x
Off
On
Off
Off
On
133MHz
66MHz
2x
Off
On
Off
On
Off
Note: N = normal mode. T = turbo mode.

CPU SPEED SELECTION (AMD PLL52C59-14T OR ICS9159-14 CLOCK)
CPU speed
Clock speed
Multiplier
DS/1
DS/2
DS/3
DS/4
75MHz
50MHz
1.5x
Off
Off
On
On
90MHz
60MHz
1.5x
Off
Off
Off
On
100MHz
66MHz
1.5x
Off
Off
On
Off
90MHz
60MHz
1.5x
Off
Off
Off
On
100MHz
66MHz
1.5x
Off
Off
On
Off
120MHz
60MHz
2x
Off
On
Off
On
133MHz
66MHz
2x
Off
On
On
Off

CPU SPEED SELECTION (AMD PLL52C59-14T OR ICS9159-14 CLOCK, CON’T)
CPU speed
Clock speed
Multiplier
DS/5
DS/6
DS/7 N
DS/7 T
75MHz
50MHz
1.5x
Off
Off
Off
N/A
90MHz
60MHz
1.5x
On
Off
Off
On
100MHz
66MHz
1.5x
On
Off
Off
On
90MHz
60MHz
1.5x
On
Off
Off
On
100MHz
66MHz
1.5x
On
Off
Off
On
120MHz
60MHz
2x
On
Off
Off
On
133MHz
66MHz
2x
On
Off
Off
On
Note: N = normal mode. T = turbo mode.

CPU SPEED SELECTION (INTEL PLL52C61-01 OR PLL52C61-21 CLOCK)
CPU speed
Clock speed
Multiplier
DS/1
DS/2
DS/3 N
DS/3 T
DS/4N
75MHz
50MHz
1.5x
Off
Off
On
N/A
On
90MHz
60MHz
1.5x
Off
Off
On
Off
On
100MHz
66MHz
1.5x
Off
Off
Off
Off
On
120MHz
60MHz
2x
Off
On
On
Off
On
133MHz
66MHz
2x
Off
On
Off
Off
On
150MHz
60MHz
2.5x
On
On
On
Off
On
166MHz
66MHz
2.5x
On
On
Off
Off
On
200MHz
66MHz
3x
On
Off
Off
Off
On
Note: N = normal mode. T = turbo mode.

CPU SPEED SELECTION (INTEL PLL52C61-01 OR PLL52C61-21 CLOCK, CON’T)
CPU speed
Clock speed
Multiplier
DS/4 T
DS/5
DS/6
DS/7 N
DS/7 T
75MHz
50MHz
1.5x
N/A
Off
Off
On
N/A
90MHz
60MHz
1.5x
Off
On
Off
Off
On
100MHz
66MHz
1.5x
Off
On
Off
On
Off
120MHz
60MHz
2x
Off
On
Off
Off
On
133MHz
66MHz
2x
Off
On
Off
On
Off
150MHz
60MHz
2.5x
Off
On
Off
Off
On
166MHz
66MHz
2.5x
Off
On
Off
On
Off
200MHz
66MHz
3x
Off
On
Off
On
Off
Note: N = normal mode. T = turbo mode.

CPU SPEED SELECTION (INTEL PLL52C59-14T OR ICS9159-14 CLOCK)
CPU speed
Clock speed
Multiplier
DS/1
DS/2
DS/3
DS/4
75MHz
50MHz
1.5x
Off
Off
On
On
90MHz
60MHz
1.5x
Off
Off
Off
On
100MHz
66MHz
1.5x
Off
Off
On
Off
120MHz
60MHz
2x
Off
On
Off
On
133MHz
66MHz
2x
Off
On
On
Off
150MHz
60MHz
2.5x
On
On
Off
On
166MHz
66MHz
2.5x
On
On
On
Off
200MHz
66MHz
3x
On
Off
On
Off

CPU SPEED SELECTION (INTEL PLL52C59-14T OR ICS9159-14 CLOCK, CON’T)
CPU speed
Clock speed
Multiplier
DS/5
DS/6
DS/7 N
DS/7 T
75MHz
50MHz
1.5x
Off
Off
Off
On
90MHz
60MHz
1.5x
On
Off
Off
On
100MHz
66MHz
1.5x
On
Off
Off
On
120MHz
60MHz
2x
On
Off
Off
On
133MHz
66MHz
2x
On
Off
Off
On
150MHz
60MHz
2.5x
On
Off
Off
On
166MHz
66MHz
2.5x
On
Off
Off
On
200MHz
66MHz
3x
On
Off
Off
On
Note: N = normal mode. T = turbo mode.

CPU VOLTAGE SELECTION (CYRIX)
Voltage
V core
VC/1
VC/2
VC/3
VC/4
VC/5
VC/6
VC/7
VC/8

2.7v
3.3v
Off
Off
Off
Off
On
Off
Off
On

2.8v
3.3v
Off
Off
Off
On
Off
Off
Off
On

2.93v
3.3v
Off
Off
On
Off
Off
Off
Off
On
»
3.38v
3.3v
Off
On
Off
Off
Off
Off
Off
On

3.52v
3.3v
On
Off
Off
Off
Off
Off
Off
On

CPU VOLTAGE SELECTION (AMD)
Voltage
V core
VC/1
VC/2
VC/3
VC/4
VC/5
VC/6
VC/7
VC/8

2.7v
3.38v
Off
Off
Off
Off
On
Off
On
Off

2.8v
3.38v
Off
Off
Off
On
Off
Off
On
Off

2.93v
3.38v
Off
Off
On
Off
Off
Off
On
Off
»
3.38v
3.3v
Off
On
Off
Off
Off
Off
On
Off

3.52v
3.3v
On
Off
Off
Off
Off
Off
On
Off

CPU VOLTAGE SELECTION (INTEL)
Voltage
V core
VC/1
VC/2
VC/3
VC/4
VC/5
VC/6
VC/7
VC/8

2.7v
3.3v
Off
Off
Off
Off
On
Off
Off
On

2.8v
3.3v
Off
Off
Off
On
Off
Off
Off
On

2.93v
3.3v
Off
Off
On
Off
Off
Off
Off
On
»
3.38v
3.3v
Off
On
Off
Off
Off
Off
Off
On

3.52v
3.3v
On
Off
Off
Off
Off
Off
Off
On

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PR5B (REV. 1.01) Motherboard Settings and Configuration

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Processor	CX M1/AM K5/Pentium
Processor Speed	75/90/100/120/133/150/166/200MHz
Chip Set	Intel
Video Chip Set	None
Maximum Onboard Memory	128MB (EDO supported)
Maximum Video Memory	None
Cache	256/512KB
BIOS	Award
Dimensions	330mm x 218mm
I/O Options	32-bit PCI slots (3), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), cache slot, IR connector, USB connector
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Serial port 1	CN1	Reset switch	J6 pins 1 & 2
Serial port 2	CN2	Green PC connector	J6 pins 6 & 7
Parallel port	CN3	Turbo LED	J6 pins 8 & 9
Floppy drive interface	CN4	Speaker	J6 pins 11 - 14
IDE interface 2	CN5	Power LED & keylock	J6 pins 16 - 20
IDE interface 1	CN6	IR connector	JP2
USB connector	CN7	Chassis fan power	JP9
PS/2 mouse port	J4	32-bit PCI slots	PC1 - PC3
IDE interface LED	J5	Cache slot	SL1

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	Factory configured - do not alter	DS8	Off
»	Factory configured - do not alter	J1	Unidentified
»	CMOS memory normal operation	JP3	Pins 1 & 2 closed
	CMOS memory clear	JP3	Pins 2 & 3 closed
	Flash BIOS voltage select 12v	JP8	Pins 2 & 3 closed
	Flash BIOS voltage select 5v	JP8	Pins 1 & 2 closed
Note: JP8 may not be present on all boards.

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) 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
Note: Board accepts EDO memory.

CACHE CONFIGURATION
Size	Bank 0	SL1
256KB (A)	(2) 32K x 32	Not installed
256KB (B)	None	256KB module installed
512KB (A)	(2) 32K x 32	256KB module installed
512KB (B)	(2) 64K x 32	Not installed
512KB (C)	None	512KB module installed

CACHE JUMPER CONFIGURATION
Size	JP1
None	Open
256KB (A)	Open
256KB (B)	Open
512KB (A)	Closed
512KB (B)	Open
512KB (C)	Closed

CPU SPEED SELECTION (CYRIX PLL52C61-01 OR PLL52C61-21 CLOCK)
CPU speed	Clock speed	Multiplier	DS/1	DS/2	DS/3 N	DS/3 T	DS/4N
120MHz	50MHz	2x	Off	On	On	N/A	On
133MHz	55MHz	2x	Off	On	On	N/A	Off
150MHz	60MHz	2x	Off	On	On	Off	On
166MHz	66MHz	2x	Off	On	Off	Off	On
200MHz	75MHz	2x	Off	On	On	N/A	Off
Note: N = normal mode. T = turbo mode.

CPU VOLTAGE SELECTION (CYRIX)
Voltage		V core	VC/1	VC/2	VC/3	VC/4	VC/5	VC/6	VC/7	VC/8
	2.7v	3.3v	Off	Off	Off	Off	On	Off	Off	On
	2.8v	3.3v	Off	Off	Off	On	Off	Off	Off	On
	2.93v	3.3v	Off	Off	On	Off	Off	Off	Off	On
»	3.38v	3.3v	Off	On	Off	Off	Off	Off	Off	On
	3.52v	3.3v	On	Off	Off	Off	Off	Off	Off	On

CPU VOLTAGE SELECTION (AMD)
Voltage		V core	VC/1	VC/2	VC/3	VC/4	VC/5	VC/6	VC/7	VC/8
	2.7v	3.38v	Off	Off	Off	Off	On	Off	On	Off
	2.8v	3.38v	Off	Off	Off	On	Off	Off	On	Off
	2.93v	3.38v	Off	Off	On	Off	Off	Off	On	Off
»	3.38v	3.3v	Off	On	Off	Off	Off	Off	On	Off
	3.52v	3.3v	On	Off	Off	Off	Off	Off	On	Off

CPU VOLTAGE SELECTION (INTEL)
Voltage		V core	VC/1	VC/2	VC/3	VC/4	VC/5	VC/6	VC/7	VC/8
	2.7v	3.3v	Off	Off	Off	Off	On	Off	Off	On
	2.8v	3.3v	Off	Off	Off	On	Off	Off	Off	On
	2.93v	3.3v	Off	Off	On	Off	Off	Off	Off	On
»	3.38v	3.3v	Off	On	Off	Off	Off	Off	Off	On
	3.52v	3.3v	On	Off	Off	Off	Off	Off	Off	On