DataExpert OPTI-495WB
Also known as: DataExpert EXPC454SA
Form factor
Baby-AT (max 220 x 330mm)
PSU connector
AT-Style (P8-P9)
Chipset
Chipset parts
OPTi 82C392 (DBC) OPTi 82C493 (any brand) 82C206
Dimensions
330mm x 218mm
CPU socket
PGA168
CPU platform
486
Supported FSB speeds
20MHz, 25MHz, 33MHz
Cache
64 KB , 128 KB , 256 KB
Supported RAM size
32 MB
Supported RAM type
30-pin SIMM
I/O ports
1x 
AT Keyboard
Expansion slots
1x 
8-bit ISA
7x 
16-bit ISA

Known issues:

  • DALLAS RTC may be flat.

    The RTC chip contains a battery which is probably empty by now. This battery holds the CMOS settings. If your board doesn't save the CMOS settings, replace the RTC chip with an equivalent, or mod the existing chip. Replacements can be made following this https://github.com/necroware/nwX287 or this https://github.com/necroware/nw12887 depending on the actual chip used.

Last updated 2022-08-21T12:23:52Z
drv Drivers: not available
BIOS images: 1 file
Manuf.
POST String
Note
Core Ver.
BIOS Ver.
AMI
40-0101-D41107-10101111-060691-OPWBSX
060691
doc Documentation: 1 entry
Model
Speed
FSB
Voltages
L1 Cache
L2 Cache
L3 Cache
Core
Process
TDP
Intel OverDrive 486DX4-100 (PGA168)
100MHz
33MHz
5V
8KB
-
-
-
-
-
Intel OverDrive 486DX2-66 (PGA168)
66MHz
33MHz
5V
8KB
-
-
P4T
-
-
Intel i486 DX2 66
66MHz
33MHz
5V
8KB
-
-
P24
800nm
5W
Intel i486 SX 33
33MHz
33MHz
5V
8KB
-
-
P23
1000nm
-
Intel i486 DX 33
33MHz
33MHz
5V
8KB
-
-
P4
1000nm
-
Intel OverDrive 486DX4-75 (PGA168)
75MHz
25MHz
5V
8KB
-
-
-
-
-
Intel OverDrive 486DX2-50 (PGA168)
50MHz
25MHz
5V
8KB
-
-
P4T
-
-
Intel i486 DX2 50
50MHz
25MHz
5V
8KB
-
-
P24
800nm
-
Intel i486 SX2 50
50MHz
25MHz
5V
8KB
-
-
-
800nm
-
Intel i486 SX 25
25MHz
25MHz
5V
8KB
-
-
P23
1000nm
-
Intel i486 DX 25
25MHz
25MHz
5V
8KB
-
-
P4
1000nm
-
Intel OverDrive 486SX2-40 (PGA168)
40MHz
20MHz
5V
8KB
-
-
P23T
-
-
Intel i486 SX 20
20MHz
20MHz
5V
8KB
-
-
P23
1000nm
-
No NPUs listed.

Disclaimer

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