ABit AB-PB4 (rev 1.2)
Form factor
Baby AT
PSU connector
AT-Style (P8-P9)
Chipset
Chipset parts
ALi M1487 (IBC) ALi M1489 (CMP)
Dimensions
220mm x 220mm
CPU socket
Socket 3 (PGA237)
CPU platforms
486486 (DX4)
Supported FSB speeds
25MHz, 33MHz, 40MHz, 50MHz
Cache
128 KB , 256 KB
Supported RAM size
64 MB
Supported RAM types
72-pin FPM, 72-pin EDO
I/O ports
1x 
Floppy interface
2x 
IDE interface
1x 
Parallel
2x 
Serial
1x 
AT Keyboard
Expansion slots
3x 
32-bit PCI
3x 
16-bit ISA
1x 
PISA
Last updated 2022-07-22T09:09:35Z
drv Drivers: not available
BIOS images: 1 file
Manuf.
POST String
Note
Core Ver.
BIOS Ver.
Award
07/03/96-ALI-1487/89-2A4KDA1BC-F2
4.51PG
Award
12/06/95-ALI-1487/89-2A4KDA12C-7A
Not Found
4.50G
7A
doc Documentation: 3 entries
Model
Speed
FSB
Voltages
L1 Cache
L2 Cache
L3 Cache
Core
Process
TDP
AMD Am486 DX-40
40MHz
40MHz
5V
8KB
-
-
-
-
-
AMD Am486 DX4-120
120MHz
40MHz
3.3V
8KB
-
-
-
500nm
3W
AMD Am486 DX4-100
100MHz
33MHz
3.3V
8KB
-
-
-
500nm
2W
Cyrix Cx486 DX2-80
80MHz
40MHz
5V
8KB
-
-
M7
-
-
Cyrix Cx486 DX2-66
66MHz
33MHz
5V
8KB
-
-
M7
-
-
Cyrix Cx486 DX2-50
50MHz
25MHz
5V
8KB
-
-
M7
-
-
Cyrix 5x86-120
120MHz
40MHz
3.45V
16KB
-
-
M1sc
650nm
3W
Cyrix Cx486 DX2-v80
80MHz
40MHz
3.45V
8KB
-
-
M7
-
-
Cyrix 5x86-80
80MHz
40MHz
3.45V
16KB
-
-
M1sc
650nm
3W
Cyrix Cx486 DX4 100
100MHz
33MHz
3.45V
8KB
-
-
M9
-
-
Cyrix 5x86-100
100MHz
33MHz
3.45V
16KB
-
-
M1sc
650nm
3W
Cyrix Cx486 DX2-v66
66MHz
33MHz
3.45V
8KB
-
-
M7
-
-
Cyrix Cx486 DX4 100
75MHz
25MHz
3.45V
8KB
-
-
M9
-
-
Cyrix Cx486 DX2-v50
50MHz
25MHz
3.45V
8KB
-
-
M7
-
-
Intel i486 DX 50
50MHz
50MHz
5V
8KB
-
-
P4
1000nm
-
Intel i486 DX2 66
66MHz
33MHz
5V
8KB
-
-
P24
800nm
5W
Intel i486 DX2 66 (WB)
66MHz
33MHz
5V
8KB
-
-
P24D
800nm
-
Intel i486 DX 33
33MHz
33MHz
5V
8KB
-
-
P4
1000nm
-
Intel i486 SX 33
33MHz
33MHz
5V
8KB
-
-
P23
1000nm
-
Intel i486 DX2 50
50MHz
25MHz
5V
8KB
-
-
P24
800nm
-
Intel i486 DX2 50 (WB)
50MHz
25MHz
5V
8KB
-
-
P24D
800nm
-
Intel i486 DX 25
25MHz
25MHz
5V
8KB
-
-
P4
1000nm
-
Intel i486 SX 25
25MHz
25MHz
5V
8KB
-
-
P23
1000nm
-
Intel i486 DX4 100
100MHz
33MHz
3.3V
16KB
-
-
P24C
600nm
-
Intel i486 DX4 75
75MHz
25MHz
3.3V
16KB
-
-
P24C
600nm
-
No NPUs listed.

Disclaimer

The info found in this page might not be entirely correct. Feel free to amend this page by logging in, contacting us on Discord or via email.