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# EPOX COMPUTER CO., LTD.
P55-VPX
Device Type Mainboard
Processor CX 6X86L/IBM 6X86L/CX 686MX/IBM 6X86MX/AM K5/
AM K6/Pentium/Pentium MMX
Processor 100/120/133/150/166/188/200/225/233/266/300/333MHz
Speed
Chip Set VIA
Video Chip None
Set
Maximum 256MB (EDO & SDRAM supported)
Onboard
Memory
Maximum None
Video
Memory
Cache 256/512KB
BIOS Award
Dimensions 254mm x 218mm
I/O Options 32-bit PCI slots (4), floppy drive interface,
green PC connector, IDE interfaces (2), parallel
port, PS/2 mouse interface, serial ports (2), IR
connector, USB connector, ATX power connector
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| ATX power | ATX | IR connector | JP10 |
| connector | | | |
|-------------------+----------+------------------+----------|
| Serial port 1 | CN2 | Power LED & | JP11A |
| | | keylock | |
|-------------------+----------+------------------+----------|
| Serial port 2 | CN3 | Speaker | JP11B |
|-------------------+----------+------------------+----------|
| USB connector | CN4 | Reset switch | JP11C |
|-------------------+----------+------------------+----------|
| Parallel port | CN5 | Green PC LED | JP11D |
|-------------------+----------+------------------+----------|
| Floppy drive | CN6 | Turbo LED | JP11E |
| interface | | | |
|-------------------+----------+------------------+----------|
| IDE interface 2 | CN7 | IDE interface | JP11F |
| | | LED | |
|-------------------+----------+------------------+----------|
| IDE interface 1 | CN8 | Soft off power | JP11G |
| | | supply | |
|-------------------+----------+------------------+----------|
| PS/2 mouse | JP1 | 32-bit PCI slots | PC1 – |
| interface | | | PC4 |
|-------------------+----------+------------------+----------|
| CPU fan power | JP7 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|--------------------------------+-------+-------------------|
| | Keyboard power on disabled | JP2 | Pins 1 & 2 closed |
|---+----------------------------+-------+-------------------|
| | Keyboard power on enabled | JP2 | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 2 |
|----------------------------+-------------------------------|
| 8MB | (2) 1M x 36 |
|----------------------------+-------------------------------|
| 16MB | (2) 2M x 36 |
|----------------------------+-------------------------------|
| 32MB | (2) 4M x 36 |
|----------------------------+-------------------------------|
| 64MB | (2) 8M x 36 |
|----------------------------+-------------------------------|
| 128MB | (2) 16M x 36 |
|----------------------------+-------------------------------|
| 256MB | (2) 32M x 36 |
|------------------------------------------------------------|
| Note: Board accepts EDO memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 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 SDRAM memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Voltage | JP5 |
|----------------------------+-------------------------------|
| » | 3.3v | Pins 5 & 6, 7 & 8 closed |
|---+------------------------+-------------------------------|
| | 5v | Pins 1 & 2, 3 & 4 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Note: The location of the 256KB/512KB cache is |
| unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86L) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | JP6 |
|------------+-------------+------------+--------------------|
| 150MHz | 60MHz | 2x | Pins 2 & 15 closed |
|------------+-------------+------------+--------------------|
| 166MHz | 66MHz | 2x | Pins 3 & 16 closed |
|------------+-------------+------------+--------------------|
| 200MHz | 75MHz | 2x | Pins 4 & 17 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (IBM 6X86L) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | JP6 |
|------------+-------------+------------+--------------------|
| 150MHz | 60MHz | 2x | Pins 2 & 15 closed |
|------------+-------------+------------+--------------------|
| 166MHz | 66MHz | 2x | Pins 3 & 16 closed |
|------------+-------------+------------+--------------------|
| 200MHz | 75MHz | 2x | Pins 4 & 17 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86MX) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | JP6 |
|-----------+-------------+------------+---------------------|
| 166MHz | 66MHz | 2x | Pins 3 & 16 closed |
|-----------+-------------+------------+---------------------|
| 166MHz | 60MHz | 2.5x | Pins 5 & 18 closed |
|-----------+-------------+------------+---------------------|
| 200MHz | 75MHz | 2x | Pins 4 & 17 closed |
|-----------+-------------+------------+---------------------|
| 200MHz | 66MHz | 2.5x | Pins 6 & 19 closed |
|-----------+-------------+------------+---------------------|
| 233MHz | 75MHz | 2.5x | Pins 7 & 20 closed |
|-----------+-------------+------------+---------------------|
| 233MHz | 66MHz | 3x | Pins 8 & 21 closed |
|-----------+-------------+------------+---------------------|
| 266MHz | 75MHz | 3x | Pins 9 & 22 closed |
|-----------+-------------+------------+---------------------|
| 266MHz | 66MHz | 3.5x | Pins 10 & 23 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (IBM 6X86MX) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | JP6 |
|-----------+-------------+------------+---------------------|
| 166MHz | 66MHz | 2x | Pins 3 & 16 closed |
|-----------+-------------+------------+---------------------|
| 166MHz | 60MHz | 2.5x | Pins 5 & 18 closed |
|-----------+-------------+------------+---------------------|
| 200MHz | 75MHz | 2x | Pins 4 & 17 closed |
|-----------+-------------+------------+---------------------|
| 200MHz | 66MHz | 2.5x | Pins 6 & 19 closed |
|-----------+-------------+------------+---------------------|
| 233MHz | 75MHz | 2.5x | Pins 7 & 20 closed |
|-----------+-------------+------------+---------------------|
| 233MHz | 66MHz | 3x | Pins 8 & 21 closed |
|-----------+-------------+------------+---------------------|
| 266MHz | 75MHz | 3x | Pins 9 & 22 closed |
|-----------+-------------+------------+---------------------|
| 266MHz | 66MHz | 3.5x | Pins 10 & 23 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AM K5) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | JP6 |
|------------+-------------+------------+--------------------|
| 100MHz | 66MHz | 1.5x | Pins 1 & 14 closed |
|------------+-------------+------------+--------------------|
| 120MHz | 60MHz | 2x | Pins 2 & 15 closed |
|------------+-------------+------------+--------------------|
| 133MHz | 66MHz | 2x | Pins 3 & 16 closed |
|------------+-------------+------------+--------------------|
| 150MHz | 60MHz | 2.5x | Pins 5 & 18 closed |
|------------+-------------+------------+--------------------|
| 166MHz | 66MHz | 2.5x | Pins 6 & 19 closed |
|------------+-------------+------------+--------------------|
| 188MHz | 75MHz | 2.5x | Pins 7 & 20 closed |
|------------+-------------+------------+--------------------|
| 200MHz | 66MHz | 3x | Pins 8 & 21 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AM K6) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | JP6 |
|-----------+-------------+------------+---------------------|
| 166MHz | 66MHz | 2.5x | Pins 6 & 19 closed |
|-----------+-------------+------------+---------------------|
| 200MHz | 66MHz | 3x | Pins 8 & 21 closed |
|-----------+-------------+------------+---------------------|
| 225MHz | 75MHz | 3x | Pins 9 & 22 closed |
|-----------+-------------+------------+---------------------|
| 233MHz | 66MHz | 3.5x | Pins 10 & 23 closed |
|-----------+-------------+------------+---------------------|
| 266MHz | 66MHz | 4x | Pins 11 & 24 closed |
|-----------+-------------+------------+---------------------|
| 300MHz | 66MHz | 4.5x | Pins 12 & 25 closed |
|-----------+-------------+------------+---------------------|
| 333MHz | 66MHz | 5x | Pins 13 & 26 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | JP6 |
|------------+-------------+------------+--------------------|
| 100MHz | 66MHz | 1.5x | Pins 1 & 14 closed |
|------------+-------------+------------+--------------------|
| 120MHz | 60MHz | 2x | Pins 2 & 15 closed |
|------------+-------------+------------+--------------------|
| 133MHz | 66MHz | 2x | Pins 3 & 16 closed |
|------------+-------------+------------+--------------------|
| 150MHz | 60MHz | 2.5x | Pins 5 & 18 closed |
|------------+-------------+------------+--------------------|
| 166MHz | 66MHz | 2.5x | Pins 6 & 19 closed |
|------------+-------------+------------+--------------------|
| 188MHz | 75MHz | 2.5x | Pins 7 & 20 closed |
|------------+-------------+------------+--------------------|
| 200MHz | 66MHz | 3x | Pins 8 & 21 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL MMX) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | JP6 |
|-----------+-------------+------------+---------------------|
| 166MHz | 66MHz | 2.5x | Pins 6 & 19 closed |
|-----------+-------------+------------+---------------------|
| 200MHz | 66MHz | 3x | Pins 8 & 21 closed |
|-----------+-------------+------------+---------------------|
| 225MHz | 75MHz | 3x | Pins 9 & 22 closed |
|-----------+-------------+------------+---------------------|
| 233MHz | 66MHz | 3.5x | Pins 10 & 23 closed |
|-----------+-------------+------------+---------------------|
| 266MHz | 66MHz | 4x | Pins 11 & 24 closed |
|-----------+-------------+------------+---------------------|
| 300MHz | 66MHz | 4.5x | Pins 12 & 25 closed |
|-----------+-------------+------------+---------------------|
| 333MHz | 66MHz | 5x | Pins 13 & 26 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | JP8 |
|----------------------------+-------------------------------|
| 2.0v | Pins 1 & 6 closed |
|----------------------------+-------------------------------|
| 2.2v | Pins 5 & 10 closed |
|----------------------------+-------------------------------|
| 2.8v | Pins 2 & 7 closed |
|----------------------------+-------------------------------|
| 2.9v | Pins 3 & 8 closed |
|----------------------------+-------------------------------|
| 3.2v | Pins 4 & 9 closed |
+------------------------------------------------------------+