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# PC CHIPS MANUFACTURING, LTD.
M726
Device Type Mainboard
Processor Pentium II/ Celeron
Processor Speed 233/266/300/333/350/366/400/450/500MHz
Chip Set Unidentified
Audio Chip Set 3D Sound Pro
Maximum Onboard 768MB (SDRAM supported)
Memory
Cache 0/128/256/512KB (located on the CPU)
BIOS AMI
Dimensions 220mm x 220mm
I/O Options 32-bit PCI slots (3), floppy drive interface,
IDE interfaces (2), parallel port, PS/2 mouse
interface, serial ports (2), ATX power
connector, AGP slot, audio in - CD-ROMs (2)
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------+----------+---------------+---------------|
| AGP slot | AGP | Sound and | J3 |
| | | game header | |
|-----------------+----------+---------------+---------------|
| ATX power | ATX | Speaker | J4/pins 1, 3, |
| connector | | | 5, 7 |
|-----------------+----------+---------------+---------------|
| Audio in - | CD1 | Power LED & | J4/pins 2, 4, |
| CD-ROM | | keylock | 6, 8, 10 |
|-----------------+----------+---------------+---------------|
| Audio in - | CD2 | Turbo LED | J4/pins 13 & |
| CD-ROM | | | 14 |
|-----------------+----------+---------------+---------------|
| Serial port 1 | COM1 | IDE interface | J4/pins 15 & |
| | | LED | 16 |
|-----------------+----------+---------------+---------------|
| Serial port 2 | COM2 | Reset switch | J4/pins 17 & |
| | | | 18 |
|-----------------+----------+---------------+---------------|
| Chassis fan | FANC | Green PC LED | J4/pins 19 & |
| power | | | 20 |
|-----------------+----------+---------------+---------------|
| CPU fan power | FANP | Digital audio | JP6 |
| | | in | |
|-----------------+----------+---------------+---------------|
| Floppy drive | FDC1 | Digital audio | JP7 |
| interface | | out | |
|-----------------+----------+---------------+---------------|
| IDE interface 1 | IDE1 | 32-bit PCI | PC1 - PC3 |
| | | slots | |
|-----------------+----------+---------------+---------------|
| IDE interface 2 | IDE2 | Parallel port | PRN1 |
|-----------------+----------+---------------+---------------|
| ATX form card | J2 | | |
| connector | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| » | CMOS memory normal operation | JP2 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | CMOS memory clear | JP2 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Microphone type select standard | JP3 | Open |
|---+---------------------------------+-------+--------------|
| | Microphone type select special | JP3 | Closed |
|---+---------------------------------+-------+--------------|
| » | Onboard sound pro enabled | JP8 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Onboard sound pro disabled | JP8 | Pins 1 & 2 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|---------+-------------------+------------------+-----------|
| 8 MB | 1 M x 64 | None | None |
|---------+-------------------+------------------+-----------|
| 16 MB | 1 M x 64 | 1 M x 64 | None |
|---------+-------------------+------------------+-----------|
| 16 MB | 2 M x 64 | None | None |
|---------+-------------------+------------------+-----------|
| 24 MB | 1 M x 64 | 1 M x 64 | 1 M x 64 |
|---------+-------------------+------------------+-----------|
| 32 MB | 2 M x 64 | 2 M x 64 | None |
|---------+-------------------+------------------+-----------|
| 32 MB | 4 M x 64 | None | None |
|---------+-------------------+------------------+-----------|
| 40 MB | 2 M x 64 | 2 M x 64 | 1 M x 64 |
|---------+-------------------+------------------+-----------|
| 48 MB | 2 M x 64 | 2 M x 64 | 2 M x 64 |
|---------+-------------------+------------------+-----------|
| 64 MB | 4 M x 64 | 4 M x 64 | None |
|---------+-------------------+------------------+-----------|
| 64 MB | 8 M x 64 | None | None |
|---------+-------------------+------------------+-----------|
| 80 MB | 4 M x 64 | 4 M x 64 | 2 M x 64 |
|---------+-------------------+------------------+-----------|
| 96 MB | 4 M x 64 | 4 M x 64 | 4 M x 64 |
|---------+-------------------+------------------+-----------|
| 128 MB | 8 M x 64 | 8 M x 64 | None |
|---------+-------------------+------------------+-----------|
| 128 MB | 16 M x 64 | None | None |
|---------+-------------------+------------------+-----------|
| 130 MB | 8 M x 64 | 8 M x 64 | 4 M x 64 |
|---------+-------------------+------------------+-----------|
| 192 MB | 8 M x 64 | 8 M x 64 | 8 M x 64 |
|---------+-------------------+------------------+-----------|
| 256 MB | 16 M x 64 | 16 M x 64 | None |
|---------+-------------------+------------------+-----------|
| 256 MB | 32 M x 64 | None | None |
|---------+-------------------+------------------+-----------|
| 320 MB | 16 M x 64 | 16 M x 64 | 8 M x 64 |
|---------+-------------------+------------------+-----------|
| 384 MB | 16 M x 64 | 16 M x 64 | 16 M x 64 |
|---------+-------------------+------------------+-----------|
| 512 MB | 32 M x 64 | 32 M x 64 | None |
|---------+-------------------+------------------+-----------|
| 640 MB | 32 M x 64 | 32 M x 64 | 16 M x 64 |
|---------+-------------------+------------------+-----------|
| 768 MB | 32 M x 64 | 32 M x 64 | 32 M x 64 |
|------------------------------------------------------------|
| DIMM VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Voltage | JP1A | JP1B | |
|---------+-------------------+------------------+-----------|
| 3.3v | Pins 1 & 2 closed | Pins 1 & 2 | |
| | | closed | |
|---------+-------------------+------------------+-----------|
| 5v | Pins 2 & 3 closed | Pins 2 & 3 | |
| | | closed | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Note: 256KB/512KB cache is located on the Pentium II CPU. |
| 128KB cache is located on the Celeron 300A & 333 CPU. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU MULTIPLIER SELECTION |
|------------------------------------------------------------|
| Multiplier | JP4A | JP4B | JP4C | JP4D |
|--------------+-----------+-----------+----------+----------|
| 2x | Closed | Closed | Closed | Closed |
|--------------+-----------+-----------+----------+----------|
| 2.5x | Open | Closed | Closed | Closed |
|--------------+-----------+-----------+----------+----------|
| 3x | Closed | Closed | Open | Closed |
|--------------+-----------+-----------+----------+----------|
| 3.5x | Open | Closed | Open | Closed |
|--------------+-----------+-----------+----------+----------|
| 4x | Closed | Closed | Closed | Open |
|--------------+-----------+-----------+----------+----------|
| 4.5x | Open | Closed | Closed | Open |
|--------------+-----------+-----------+----------+----------|
| 5x | Closed | Closed | Open | Open |
|--------------+-----------+-----------+----------+----------|
| 5.5x | Open | Closed | Open | Open |
|--------------+-----------+-----------+----------+----------|
| 6x | Closed | Open | Closed | Closed |
|--------------+-----------+-----------+----------+----------|
| 6.5x | Open | Open | Closed | Closed |
|--------------+-----------+-----------+----------+----------|
| 7x | Closed | Open | Open | Closed |
|--------------+-----------+-----------+----------+----------|
| 7.5x | Open | Open | Open | Closed |
|--------------+-----------+-----------+----------+----------|
| 8x | Closed | Open | Closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU FREQUENCY SELECTION |
|------------------------------------------------------------|
| Speed | JP5 | JP10 | JP11 |
|--------+----------------+----------------+-----------------|
| 66MHz | Pins 2 & 3 | Pins 1 & 2 | Pins 1 & 2 |
| | closed | closed | closed |
|--------+----------------+----------------+-----------------|
| 100MHz | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | closed | closed | closed |
|--------+----------------+----------------+-----------------|
| 112MHz | Pins 1 & 2 | Pins 1 & 2 | Pins 2 & 3 |
| | closed | closed | closed |
|--------+----------------+----------------+-----------------|
| 133MHz | Pins 1 & 2 | Pins 2 & 3 | Pins 1 & 2 |
| | closed | closed | closed |
+------------------------------------------------------------+