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# ASUS COMPUTER INTERNATIONAL
TXP4-X (REV. 1.01)
Device Type Mainboard
Processor CX 6X86/IBM 6X86/CX 686MX/IBM 6X86MX/AM K5/
AM K6/Pentium/Pentium MMX
Processor Speed 75/90/100/120/133/150/166/200/233MHz
Chip Set Intel
Video Chip Set None
Maximum Onboard 256MB (EDO & SDRAM supported)
Memory
Maximum Video None
Memory
Cache 512KB
BIOS Unidentified
Dimensions 305mm x 244mm
I/O Options 32-bit PCI slots (4), floppy drive interface,
green PC connector, IDE interfaces (2),
parallel port, PS/2 mouse port, serial ports
(2), IR connector, USB connectors (2), ATX
power connector
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------+------------+------------------+-----------|
| ATX power | ATX | Parallel port | CN1 |
| connector | | | |
|----------------+------------+------------------+-----------|
| Power LED & | C1/pins 1 | Serial port 2 | CN2 |
| keylock | - 5 | | |
|----------------+------------+------------------+-----------|
| Speaker | C1/pins 7 | Serial port 1 | CN3 |
| | - 10 | | |
|----------------+------------+------------------+-----------|
| Message LED | C1/pins 12 | USB connector 1 | CN4 |
| | & 13 | | |
|----------------+------------+------------------+-----------|
| Green PC | C1/pins 14 | USB connector 2 | CN5 |
| connector | & 15 | | |
|----------------+------------+------------------+-----------|
| Soft off power | C1/pins 16 | PS/2 mouse port | CN6 |
| supply | & 17 | | |
|----------------+------------+------------------+-----------|
| Reset switch | C1/pins 19 | Floppy drive | CN7 |
| | & 20 | interface | |
|----------------+------------+------------------+-----------|
| IDE interface | C2 | IDE interface 2 | CN8 |
| LED | | | |
|----------------+------------+------------------+-----------|
| Chassis fan | C3 | IDE interface 1 | CN9 |
| power | | | |
|----------------+------------+------------------+-----------|
| Chassis fan | C4 | IR connector | IR1 |
| power | | | |
|----------------+------------+------------------+-----------|
| CPU fan power | C5 | 32-bit PCI slots | PC1 – PC4 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|----------------------------------+-------+-----------------|
| » | On board I/O enabled | MIO | Pins 1 & 2 |
| | | | closed |
|---+------------------------------+-------+-----------------|
| | On board I/O disabled | MIO | Pins 2 & 3 |
| | | | closed |
|---+------------------------------+-------+-----------------|
| » | CMOS memory normal operation | RTC | Pins 1 & 2 |
| | | | closed |
|---+------------------------------+-------+-----------------|
| | CMOS memory clear | RTC | Pins 2 & 3 |
| | | | 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 |
|------------------+--------------------+--------------------|
| 136MB | (2) 16M x 36 | (2) 1M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 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. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 2 | Bank 3 |
|------------------+--------------------+--------------------|
| 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) 8M x 64 | (1) 8M x 64 |
|------------------------------------------------------------|
| Note: Board accepts SDRAM memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 |
|----------------------------+-------------------------------|
| 512KB | (2) 64K x 32 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86) |
|------------------------------------------------------------|
| CPU | Clock |Multiplier| BF0 | BF1 |BF2 | FS0 |FS1 |FS2 |
| speed | speed | | | | | | | |
|-------+--------+----------+-----+-----+----+-----+----+----|
|166MHz | 66MHz | 2x |2 & 3|1 & 2|Open|2 & 3|1 & |2 & |
| | | | | | | | 2 | 3 |
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (IBM 6X86) |
|------------------------------------------------------------|
| CPU | Clock |Multiplier| BF0 | BF1 |BF2 | FS0 |FS1 |FS2 |
| speed | speed | | | | | | | |
|-------+--------+----------+-----+-----+----+-----+----+----|
|166MHz | 66MHz | 2x |2 & 3|1 & 2|Open|2 & 3|1 & |2 & |
| | | | | | | | 2 | 3 |
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86MX) |
|------------------------------------------------------------|
| CPU | Clock |Multiplier| BF0 | BF1 |BF2 | FS0 |FS1 |FS2 |
| speed | speed | | | | | | | |
|-------+--------+----------+-----+-----+----+-----+----+----|
|166MHz | 60MHz | 2.5x |2 & 3|2 & 3|Open|1 & 2|2 & |2 & |
| | | | | | | | 3 | 3 |
|-------+--------+----------+-----+-----+----+-----+----+----|
|200MHz | 66MHz | 2.5x |2 & 3|2 & 3|Open|2 & 3|1 & |2 & |
| | | | | | | | 2 | 3 |
|-------+--------+----------+-----+-----+----+-----+----+----|
|233MHz | 66MHz | 3x |1 & 2|2 & 3|Open|2 & 3|1 & |2 & |
| | | | | | | | 2 | 3 |
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (IBM 6X86MX) |
|------------------------------------------------------------|
| CPU | Clock |Multiplier| BF0 | BF1 |BF2 | FS0 |FS1 |FS2 |
| speed | speed | | | | | | | |
|-------+--------+----------+-----+-----+----+-----+----+----|
|166MHz | 60MHz | 2.5x |2 & 3|2 & 3|Open|1 & 2|2 & |2 & |
| | | | | | | | 3 | 3 |
|-------+--------+----------+-----+-----+----+-----+----+----|
|200MHz | 66MHz | 2.5x |2 & 3|2 & 3|Open|2 & 3|1 & |2 & |
| | | | | | | | 2 | 3 |
|-------+--------+----------+-----+-----+----+-----+----+----|
|233MHz | 66MHz | 3x |1 & 2|2 & 3|Open|2 & 3|1 & |2 & |
| | | | | | | | 2 | 3 |
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AM K5) |
|------------------------------------------------------------|
| CPU | Clock |Multiplier| BF0 | BF1 |BF2 | FS0 |FS1 |FS2 |
| speed | speed | | | | | | | |
|-------+--------+----------+-----+-----+----+-----+----+----|
| 75MHz | 50MHz | 1.5x |1 & 2|1 & 2|Open|2 & 3|2 & |2 & |
| | | | | | | | 3 | 3 |
|-------+--------+----------+-----+-----+----+-----+----+----|
| 90MHz | 60MHz | 1.5x |1 & 2|1 & 2|Open|1 & 2|2 & |2 & |
| | | | | | | | 3 | 3 |
|-------+--------+----------+-----+-----+----+-----+----+----|
|100MHz | 66MHz | 1.5x |1 & 2|1 & 2|Open|2 & 3|1 & |2 & |
| | | | | | | | 2 | 3 |
|-------+--------+----------+-----+-----+----+-----+----+----|
|120MHz | 60MHz | 1.5x |1 & 2|1 & 2|Open|1 & 2|2 & |2 & |
| | | | | | | | 3 | 3 |
|-------+--------+----------+-----+-----+----+-----+----+----|
|133MHz | 66MHz | 1.5x |1 & 2|1 & 2|Open|2 & 3|1 & |2 & |
| | | | | | | | 2 | 3 |
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AM K6) |
|------------------------------------------------------------|
| CPU | Clock |Multiplier| BF0 | BF1 |BF2 | FS0 |FS1 |FS2 |
| speed | speed | | | | | | | |
|-------+--------+----------+-----+-----+----+-----+----+----|
|166MHz | 66MHz | 2.5x |2 & 3|2 & 3|Open|2 & 3|1 & |2 & |
| | | | | | | | 2 | 3 |
|-------+--------+----------+-----+-----+----+-----+----+----|
|200MHz | 66MHz | 3x |1 & 2|2 & 3|Open|2 & 3|1 & |2 & |
| | | | | | | | 2 | 3 |
|-------+--------+----------+-----+-----+----+-----+----+----|
|233MHz | 66MHz | 3.5x |1 & 2|1 & 2|Open|2 & 3|1 & |2 & |
| | | | | | | | 2 | 3 |
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL) |
|------------------------------------------------------------|
| CPU | Clock |Multiplier| BF0 | BF1 |BF2 | FS0 |FS1 |FS2 |
| speed | speed | | | | | | | |
|-------+--------+----------+-----+-----+----+-----+----+----|
| 75MHz | 50MHz | 1.5x |1 & 2|1 & 2|Open|2 & 3|2 & |2 & |
| | | | | | | | 3 | 3 |
|-------+--------+----------+-----+-----+----+-----+----+----|
| 90MHz | 60MHz | 1.5x |1 & 2|1 & 2|Open|1 & 2|2 & |2 & |
| | | | | | | | 3 | 3 |
|-------+--------+----------+-----+-----+----+-----+----+----|
|100MHz | 66MHz | 1.5x |1 & 2|1 & 2|Open|2 & 3|1 & |2 & |
| | | | | | | | 2 | 3 |
|-------+--------+----------+-----+-----+----+-----+----+----|
|120MHz | 60MHz | 2x |2 & 3|1 & 2|Open|1 & 2|2 & |2 & |
| | | | | | | | 3 | 3 |
|-------+--------+----------+-----+-----+----+-----+----+----|
|133MHz | 66MHz | 2x |2 & 3|1 & 2|Open|2 & 3|1 & |2 & |
| | | | | | | | 2 | 3 |
|-------+--------+----------+-----+-----+----+-----+----+----|
|150MHz | 60MHz | 2.5x |2 & 3|2 & 3|Open|1 & 2|2 & |2 & |
| | | | | | | | 3 | 3 |
|-------+--------+----------+-----+-----+----+-----+----+----|
|166MHz | 66MHz | 2.5x |2 & 3|2 & 3|Open|2 & 3|1 & |2 & |
| | | | | | | | 2 | 3 |
|-------+--------+----------+-----+-----+----+-----+----+----|
|200MHz | 66MHz | 3x |1 & 2|2 & 3|Open|2 & 3|1 & |2 & |
| | | | | | | | 2 | 3 |
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL MMX) |
|------------------------------------------------------------|
| CPU | Clock |Multiplier| BF0 | BF1 |BF2 | FS0 |FS1 |FS2 |
| speed | speed | | | | | | | |
|-------+--------+----------+-----+-----+----+-----+----+----|
|166MHz | 66MHz | 2.5x |2 & 3|2 & 3|Open|2 & 3|1 & |2 & |
| | | | | | | | 2 | 3 |
|-------+--------+----------+-----+-----+----+-----+----+----|
|200MHz | 66MHz | 3x |1 & 2|2 & 3|Open|2 & 3|1 & |2 & |
| | | | | | | | 2 | 3 |
|-------+--------+----------+-----+-----+----+-----+----+----|
|233MHz | 66MHz | 3.5x |1 & 2|1 & 2|Open|2 & 3|1 & |2 & |
| | | | | | | | 2 | 3 |
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION (SINGLE) |
|------------------------------------------------------------|
| Voltage | VID0 | VID1 | VID2 | VID3 |
|---------+-----------------+------------+------------+------|
| 3.4v | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 | Open |
| | closed | closed | closed | |
|---------+-----------------+------------+------------+------|
| 3.5v | Pins 1 & 2 | Pins 2 & 3 | Pins 2 & 3 | Open |
| | closed | closed | closed | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION (DUAL) |
|------------------------------------------------------------|
| Voltage | VID0 | VID1 | VID2 | VID3 |
|---------+------------+------------+------------+-----------|
| 1.8v | Open | Open | Open | Pins 1 & |
| | | | | 2 closed |
|---------+------------+------------+------------+-----------|
| 1.9v | Open | Open | Open | Pins 2 & |
| | | | | 3 closed |
|---------+------------+------------+------------+-----------|
| 2.5v | Pins 1 & 2 | Pins 2 & 3 | Pins 1 & 2 | Open |
| | closed | closed | closed | |
|---------+------------+------------+------------+-----------|
| 2.7v | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 | Open |
| | closed | closed | closed | |
|---------+------------+------------+------------+-----------|
| 2.8v | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 | Open |
| | closed | closed | closed | |
|---------+------------+------------+------------+-----------|
| 2.9v | Pins 1 & 2 | Pins 2 & 3 | Pins 2 & 3 | Open |
| | closed | closed | closed | |
|---------+------------+------------+------------+-----------|
| 3.2v | Pins 2 & 3 | Pins 2 & 3 | Pins 1 & 2 | Open |
| | closed | closed | closed | |
+------------------------------------------------------------+