EPOX COMPUTER CO., LTD.
P55KTX
| 
 Device Type  | 
 Mainboard  | 
| 
 Processor  | 
 CX 6X86L/IBM 6X86L/CX 686MX/IBM 6X86MX/AM K5/ AM K6/Pentium/Pentium MMX  | 
| 
 Processor Speed  | 
 90/100/120/133/150/166/200/233/266/300/333MHz  | 
| 
 Chip Set  | 
 VIA  | 
| 
 Video Chip Set  | 
 None  | 
| 
 Maximum Onboard Memory  | 
 256MB (SDRAM supported)  | 
| 
 Maximum Video Memory  | 
 None  | 
| 
 Cache  | 
 512KB  | 
| 
 BIOS  | 
 Award  | 
| 
 Dimensions  | 
 305mm x 244mm  | 
| 
 I/O Options  | 
 32-bit PCI slots (4), floppy drive interface, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), IR connector, USB connector, ATX power connector  | 
| 
 NPU Options  | 
 None  | 
| 
 CONNECTIONS  | |||
| 
 Purpose  | 
 Location  | 
 Purpose  | 
 Location  | 
| 
 ATX power connector  | 
 ATX  | 
 CPU fan power  | 
 J6  | 
| 
 USB connector  | 
 CN1  | 
 Power LED & keylock  | 
 J12A  | 
| 
 Serial port 2  | 
 CN2  | 
 Speaker  | 
 J12B  | 
| 
 Parallel port  | 
 CN3  | 
 Reset switch  | 
 J12C  | 
| 
 PS/2 mouse port  | 
 CN4  | 
 Green PC LED  | 
 J12D  | 
| 
 Serial port 1  | 
 CN5  | 
 Turbo LED  | 
 J12E  | 
| 
 Floppy drive interface  | 
 CN6  | 
 IDE interface LED  | 
 J12F  | 
| 
 IDE interface 1  | 
 CN7  | 
 Soft off power supply  | 
 J12G  | 
| 
 IDE interface 2  | 
 CN8  | 
 32-bit PCI slots  | 
 PC1 – PC4  | 
| 
 IR connector  | 
 J3  | ||
| 
 Note: The location of J3 is unidentified.  | |||
| 
 USER CONFIGURABLE SETTINGS  | |||
| 
 Function  | 
 Label  | 
 Position  | |
| 
 Keyboard power on disabled  | 
 J1  | 
 Pins 1 & 2 closed  | |
| 
 Keyboard power on enabled  | 
 J1  | 
 Pins 2 & 3 closed  | |
| 
 DIMM CONFIGURATION  | |||
| 
 Size  | 
 Bank 0  | 
 Bank 1  | 
 Bank 2  | 
| 
 8MB  | 
 (1) 1M x 64  | 
 None  | 
 None  | 
| 
 16MB  | 
 (1) 1M x 64  | 
 (1) 1M x 64  | 
 None  | 
| 
 16MB  | 
 (1) 2M x 64  | 
 None  | 
 None  | 
| 
 24MB  | 
 (1) 1M x 64  | 
 (1) 1M x 64  | 
 (1) 1M x 64  | 
| 
 32MB  | 
 (1) 2M x 64  | 
 (1) 2M x 64  | 
 None  | 
| 
 32MB  | 
 (1) 4M x 64  | 
 None  | 
 None  | 
| 
 48MB  | 
 (1) 2M x 64  | 
 (1) 2M x 64  | 
 (1) 2M x 64  | 
| 
 64MB  | 
 (1) 4M x 64  | 
 (1) 4M x 64  | 
 None  | 
| 
 64MB  | 
 (1) 8M x 64  | 
 None  | 
 None  | 
| 
 96MB  | 
 (1) 4M x 64  | 
 (1) 4M x 64  | 
 (1) 4M x 64  | 
| 
 128MB  | 
 (1) 8M x 64  | 
 (1) 8M x 64  | 
 None  | 
| 
 128MB  | 
 (1) 16M x 64  | 
 None  | 
 None  | 
| 
 164MB  | 
 (1) 16M x 64  | 
 (1) 1M x 64  | 
 None  | 
| 
 144MB  | 
 (1) 16M x 64  | 
 (1) 1M x 64  | 
 (1) 1M x 64  | 
| 
 144MB  | 
 (1) 16M x 64  | 
 (1) 2M x 64  | 
 None  | 
| 
 160MB  | 
 (1) 16M x 64  | 
 (1) 2M x 64  | 
 (1) 2M x 64  | 
| 
 DIMM CONFIGURATION (CON’T)  | |||
| 
 Size  | 
 Bank 0  | 
 Bank 1  | 
 Bank 2  | 
| 
 160MB  | 
 (1) 16M x 64  | 
 (1) 4M x 64  | 
 None  | 
| 
 192MB  | 
 (1) 16M x 64  | 
 (1) 4M x 64  | 
 (1) 4M x 64  | 
| 
 192MB  | 
 (1) 16M x 64  | 
 (1) 8M x 64  | 
 None  | 
| 
 192MB  | 
 (1) 8M x 64  | 
 (1) 8M x 64  | 
 (1) 8M x 64  | 
| 
 256MB  | 
 (1) 16M x 64  | 
 (1) 16M x 64  | 
 None  | 
| 
 Note: Board accepts SDRAM memory.  | |||
| 
 CACHE CONFIGURATION  | |
| 
 Size  | 
 Bank 0  | 
| 
 512KB  | 
 (1) 64K x 64  | 
| 
 CPU SPEED SELECTION (CX 6X86L)  | ||||||
| 
 CPU speed  | 
 Clock speed  | 
 Multiplier  | 
 J7  | 
 J8  | 
 J9  | 
 J11  | 
| 
 150MHz  | 
 60MHz  | 
 2.5x  | 
 1 & 2  | 
 1 & 2  | 
 2 & 3  | 
 1 & 2  | 
| 
 166MHz  | 
 66MHz  | 
 2.5x  | 
 1 & 2  | 
 1 & 2  | 
 2 & 3  | 
 Open  | 
| 
 200MHz  | 
 75MHz  | 
 3x  | 
 1 & 2  | 
 1 & 2  | 
 2 & 3  | 
 3 & 4  | 
| 
 Note: Pins designated should be in the closed position.  | ||||||
| 
 CPU SPEED SELECTION (IBM 6X86L)  | ||||||
| 
 CPU speed  | 
 Clock speed  | 
 Multiplier  | 
 J7  | 
 J8  | 
 J9  | 
 J11  | 
| 
 150MHz  | 
 60MHz  | 
 2.5x  | 
 1 & 2  | 
 1 & 2  | 
 2 & 3  | 
 1 & 2  | 
| 
 166MHz  | 
 66MHz  | 
 2.5x  | 
 1 & 2  | 
 1 & 2  | 
 2 & 3  | 
 Open  | 
| 
 200MHz  | 
 75MHz  | 
 3x  | 
 1 & 2  | 
 1 & 2  | 
 2 & 3  | 
 3 & 4  | 
| 
 Note: Pins designated should be in the closed position.  | ||||||
| 
 CPU SPEED SELECTION (CX 6X86MX)  | ||||||
| 
 CPU speed  | 
 Clock speed  | 
 Multiplier  | 
 J7  | 
 J8  | 
 J9  | 
 J11  | 
| 
 166MHz  | 
 66MHz  | 
 2x  | 
 1 & 2  | 
 1 & 2  | 
 2 & 3  | 
 Open  | 
| 
 166MHz  | 
 60MHz  | 
 2.5x  | 
 1 & 2  | 
 2 & 3  | 
 2 & 3  | 
 1 & 2  | 
| 
 200MHz  | 
 75MHz  | 
 2x  | 
 1 & 2  | 
 1 & 2  | 
 2 & 3  | 
 3 & 4  | 
| 
 200MHz  | 
 66MHz  | 
 2.5x  | 
 1 & 2  | 
 2 & 3  | 
 2 & 3  | 
 Open  | 
| 
 233MHz  | 
 75MHz  | 
 2.5x  | 
 1 & 2  | 
 2 & 3  | 
 2 & 3  | 
 3 & 4  | 
| 
 233MHz  | 
 66MHz  | 
 3x  | 
 1 & 2  | 
 2 & 3  | 
 1 & 2  | 
 Open  | 
| 
 266MHz  | 
 75MHz  | 
 3x  | 
 1 & 2  | 
 2 & 3  | 
 1 & 2  | 
 3 & 4  | 
| 
 266MHz  | 
 66MHz  | 
 3.5x  | 
 1 & 2  | 
 1 & 2  | 
 1 & 2  | 
 Open  | 
| 
 Note: Pins designated should be in the closed position.  | ||||||
| 
 CPU SPEED SELECTION (IBM 6X86MX)  | ||||||
| 
 CPU speed  | 
 Clock speed  | 
 Multiplier  | 
 J7  | 
 J8  | 
 J9  | 
 J11  | 
| 
 166MHz  | 
 66MHz  | 
 2x  | 
 1 & 2  | 
 1 & 2  | 
 2 & 3  | 
 Open  | 
| 
 166MHz  | 
 60MHz  | 
 2.5x  | 
 1 & 2  | 
 2 & 3  | 
 2 & 3  | 
 1 & 2  | 
| 
 200MHz  | 
 75MHz  | 
 2x  | 
 1 & 2  | 
 1 & 2  | 
 2 & 3  | 
 3 & 4  | 
| 
 200MHz  | 
 66MHz  | 
 2.5x  | 
 1 & 2  | 
 2 & 3  | 
 2 & 3  | 
 Open  | 
| 
 233MHz  | 
 75MHz  | 
 2.5x  | 
 1 & 2  | 
 2 & 3  | 
 2 & 3  | 
 3 & 4  | 
| 
 233MHz  | 
 66MHz  | 
 3x  | 
 1 & 2  | 
 2 & 3  | 
 1 & 2  | 
 Open  | 
| 
 266MHz  | 
 75MHz  | 
 3x  | 
 1 & 2  | 
 2 & 3  | 
 1 & 2  | 
 3 & 4  | 
| 
 266MHz  | 
 66MHz  | 
 3.5x  | 
 1 & 2  | 
 1 & 2  | 
 1 & 2  | 
 Open  | 
| 
 Note: Pins designated should be in the closed position.  | ||||||
| 
 CPU SPEED SELECTION (AM K5)  | ||||||
| 
 CPU speed  | 
 Clock speed  | 
 Multiplier  | 
 J7  | 
 J8  | 
 J9  | 
 J11  | 
| 
 90MHz  | 
 60MHz  | 
 1.5x  | 
 1 & 2  | 
 1 & 2  | 
 1 & 2  | 
 1 & 2  | 
| 
 100MHz  | 
 66MHz  | 
 1.5x  | 
 1 & 2  | 
 1 & 2  | 
 1 & 2  | 
 Open  | 
| 
 120MHz  | 
 60MHz  | 
 2x  | 
 1 & 2  | 
 1 & 2  | 
 2 & 3  | 
 1 & 2  | 
| 
 133MHz  | 
 66MHz  | 
 2x  | 
 1 & 2  | 
 1 & 2  | 
 2 & 3  | 
 Open  | 
| 
 150MHz  | 
 60MHz  | 
 2.5x  | 
 1 & 2  | 
 2 & 3  | 
 2 & 3  | 
 1 & 2  | 
| 
 166MHz  | 
 66MHz  | 
 2.5x  | 
 1 & 2  | 
 2 & 3  | 
 2 & 3  | 
 Open  | 
| 
 200MHz  | 
 66MHz  | 
 3x  | 
 1 & 2  | 
 2 & 3  | 
 1 & 2  | 
 Open  | 
| 
 Note: Pins designated should be in the closed position.  | ||||||
| 
 CPU SPEED SELECTION (AM K6)  | ||||||
| 
 CPU speed  | 
 Clock speed  | 
 Multiplier  | 
 J7  | 
 J8  | 
 J9  | 
 J11  | 
| 
 166MHz  | 
 66MHz  | 
 2.5x  | 
 1 & 2  | 
 2 & 3  | 
 2 & 3  | 
 Open  | 
| 
 200MHz  | 
 66MHz  | 
 3x  | 
 1 & 2  | 
 2 & 3  | 
 1 & 2  | 
 Open  | 
| 
 233MHz  | 
 66MHz  | 
 3.5x  | 
 1 & 2  | 
 1 & 2  | 
 1 & 2  | 
 Open  | 
| 
 266MHz  | 
 66MHz  | 
 4x  | 
 2 & 3  | 
 1 & 2  | 
 2 & 3  | 
 Open  | 
| 
 300MHz  | 
 66MHz  | 
 4.5x  | 
 2 & 3  | 
 2 & 3  | 
 2 & 3  | 
 Open  | 
| 
 333MHz  | 
 66MHz  | 
 5x  | 
 2 & 3  | 
 2 & 3  | 
 1 & 2  | 
 Open  | 
| 
 Note: Pins designated should be in the closed position.  | ||||||
| 
 CPU SPEED SELECTION (INTEL)  | ||||||
| 
 CPU speed  | 
 Clock speed  | 
 Multiplier  | 
 J7  | 
 J8  | 
 J9  | 
 J11  | 
| 
 90MHz  | 
 60MHz  | 
 1.5x  | 
 1 & 2  | 
 1 & 2  | 
 1 & 2  | 
 1 & 2  | 
| 
 100MHz  | 
 66MHz  | 
 1.5x  | 
 1 & 2  | 
 1 & 2  | 
 1 & 2  | 
 Open  | 
| 
 120MHz  | 
 60MHz  | 
 2x  | 
 1 & 2  | 
 1 & 2  | 
 2 & 3  | 
 1 & 2  | 
| 
 133MHz  | 
 66MHz  | 
 2x  | 
 1 & 2  | 
 1 & 2  | 
 2 & 3  | 
 Open  | 
| 
 150MHz  | 
 60MHz  | 
 2.5x  | 
 1 & 2  | 
 2 & 3  | 
 2 & 3  | 
 1 & 2  | 
| 
 166MHz  | 
 66MHz  | 
 2.5x  | 
 1 & 2  | 
 2 & 3  | 
 2 & 3  | 
 Open  | 
| 
 200MHz  | 
 66MHz  | 
 3x  | 
 1 & 2  | 
 2 & 3  | 
 1 & 2  | 
 Open  | 
| 
 Note: Pins designated should be in the closed position.  | ||||||
| 
 CPU SPEED SELECTION (INTEL MMX)  | ||||||
| 
 CPU speed  | 
 Clock speed  | 
 Multiplier  | 
 J7  | 
 J8  | 
 J9  | 
 J11  | 
| 
 166MHz  | 
 66MHz  | 
 2.5x  | 
 1 & 2  | 
 2 & 3  | 
 2 & 3  | 
 Open  | 
| 
 200MHz  | 
 66MHz  | 
 3x  | 
 1 & 2  | 
 2 & 3  | 
 1 & 2  | 
 Open  | 
| 
 233MHz  | 
 66MHz  | 
 3.5x  | 
 1 & 2  | 
 1 & 2  | 
 1 & 2  | 
 Open  | 
| 
 266MHz  | 
 66MHz  | 
 4x  | 
 2 & 3  | 
 1 & 2  | 
 2 & 3  | 
 Open  | 
| 
 300MHz  | 
 66MHz  | 
 4.5x  | 
 2 & 3  | 
 2 & 3  | 
 2 & 3  | 
 Open  | 
| 
 333MHz  | 
 66MHz  | 
 5x  | 
 2 & 3  | 
 2 & 3  | 
 1 & 2  | 
 Open  | 
| 
 Note: Pins designated should be in the closed position.  | ||||||
| 
 CPU VOLTAGE SELECTION  | |
| 
 Voltage  | 
 J10  | 
| 
 2.0v  | 
 Pins 1 & 2 closed  | 
| 
 2.8v  | 
 Pins 3 & 4 closed  | 
| 
 2.9v  | 
 Pins 5 & 6 closed  | 
| 
 3.2v  | 
 Pins 7 & 8 closed  | 
| 
 3.5v  | 
 Pins 9 & 10 closed  |