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# DATAEXPERT CORPORATION
MEX8440-S
Device Type Mainboard
Processor Pentium II/Celeron
Processor Speed 233/266/300/333MHz
Chip Set Intel 440EX
Maximum Onboard 256MB (EDO & SDRAM supported)
Memory
Audio Chip Set CMI 8330DX
Cache 0/128/256/512KB (located on the CPU)
BIOS Award
Dimensions 305mm x 170mm
I/O Options 32-bit PCI slots (3), floppy drive interface,
game/MIDI port, green PC connector, IDE
interfaces (2), parallel port, PS/2 mouse
port, serial ports (2), IR connector, USB
connectors (2), ATX power connector, AGP
slot, line in, line out, microphone in, audio
in - CD-ROMs (2)
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+------------------+-----------|
| AGP slot | AGP | Chassis fan | FAN1 |
| | | power | |
|------------------+----------+------------------+-----------|
| ATX power | ATX | CPU fan power | FAN2 |
| connector | | | |
|------------------+----------+------------------+-----------|
| Game/MIDI port | CN1 | IR connector | IR1 |
|------------------+----------+------------------+-----------|
| Microphone in | CN2 | Audio in - | J1 |
| | | CD-ROM | |
|------------------+----------+------------------+-----------|
| Line in | CN3 | Audio in - | J2 |
| | | CD-ROM | |
|------------------+----------+------------------+-----------|
| Line out | CN4 | Power LED & | J8/pins 1 |
| | | keylock | - 5 |
|------------------+----------+------------------+-----------|
| Serial port 2 | CN5 | IDE interface | J8/pins 6 |
| | | LED | & 16 |
|------------------+----------+------------------+-----------|
| Serial port 1 | CN6 | Green PC LED | J8/pins 7 |
| | | | & 17 |
|------------------+----------+------------------+-----------|
| Parallel port | CN7 | Green PC | J8/pins 8 |
| | | connector | & 18 |
|------------------+----------+------------------+-----------|
| USB connector 1 | CN8 | Soft off power | J8/pins 9 |
| | | supply | & 19 |
|------------------+----------+------------------+-----------|
| USB connector 2 | CN9 | Reset switch | J8/pins |
| | | | 10 & 20 |
|------------------+----------+------------------+-----------|
| PS/2 mouse port | CN10 | Speaker | J8/pins |
| | | | 11 - 14 |
|------------------+----------+------------------+-----------|
| IDE interface 2 | CN11 | Thermistor | RT1 |
| | | connector | |
|------------------+----------+------------------+-----------|
| IDE interface 1 | CN12 | 32-bit PCI slots | PC1 - PC3 |
|------------------+----------+------------------+-----------|
| Floppy drive | CN13 | 5v power | |
| interface | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 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 |
|------------------+--------------------+--------------------|
| 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. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Note: 256KB/512KB cache is located on the Pentium II CPU. |
| 128KB cache is located on the Celeron 300A & 333 CPU. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| CPU speed | Clock | Multiplier | JP1 | JP2 | JP3 |
| | speed | | | | |
|------------+----------+------------+-------+-------+-------|
| 233MHz | 66MHz | 3.5x | 2 & 3 | 2 & 3 | 2 & 3 |
|------------+----------+------------+-------+-------+-------|
| 266MHz | 66MHz | 4x | 2 & 3 | 2 & 3 | 2 & 3 |
|------------+----------+------------+-------+-------+-------|
| 300MHz | 66MHz | 4.5x | 2 & 3 | 2 & 3 | 2 & 3 |
|------------+----------+------------+-------+-------+-------|
| 333MHz | 66MHz | 5x | 2 & 3 | 2 & 3 | 2 & 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CON'T) |
|------------------------------------------------------------|
|CPU speed|Clock speed|Multiplier| JP4A | JP4B | JP4C | JP4D |
|---------+-----------+----------+------+------+------+------|
| 233MHz | 66MHz | 3.5x | Open | Open |Closed| Open |
|---------+-----------+----------+------+------+------+------|
| 266MHz | 66MHz | 4x |Closed|Closed| Open |Closed|
|---------+-----------+----------+------+------+------+------|
| 300MHz | 66MHz | 4.5x | Open |Closed| Open |Closed|
|---------+-----------+----------+------+------+------+------|
| 333MHz | 66MHz | 5x |Closed| Open | Open |Closed|
+------------------------------------------------------------+