EPOX COMPUTER CO., LTD. P55-TX 2 Device Type Mainboard Processor CX 6X86/IBM 6X86/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 Intel Video Chip Set None Maximum 256MB (EDO & SDRAM supported) Onboard Memory Maximum Video None Memory Cache 512KB BIOS Award Dimensions 305mm x 208mm 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 connector, ATX power connector NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location ATX power connector ATX Serial port 1 JP10 USB connector CN1 PS/2 mouse port JP13 IR connector J4 Power LED & keylock JP14A IDE interface 1 J5 Speaker JP14B IDE interface 2 J6 Reset switch JP14C Floppy drive interface J7 Green PC connector JP14D Parallel port J8 Green PC LED JP14E CPU fan power JP1 Turbo LED JP14F Soft off power supply JP9 IDE interface LED JP14G Serial port 2 J11 32-bit PCI slots PC1 – PC4 USER CONFIGURABLE SETTINGS Function Label Position » Keyboard power on disabled JP2 Pins 2 & 3 closed Keyboard power on enabled JP2 Pins 1 & 2 closed » CMOS memory normal operation JP8 Pins 1 & 2 closed CMOS memory clear JP8 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 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 EDO & SDRAM memory. DIMM VOLTAGE CONFIGURATION Voltage JP7 » 3.3v Pins 1 & 2, 3 & 4 closed 5v Pins 5 & 6, 7 & 8 closed Note: The location of JP7 is unidentified. CACHE CONFIGURATION Size Bank 0 TAG 512KB (1) 64K x 64 Unidentified CPU SPEED SELECTION (CX 6X86) CPU speed Clock speed Multiplier JP4 150MHz 60MHz 2x Pins 3 & 4 closed 166MHz 66MHz 2x Pins 5 & 6 closed 200MHz 75MHz 2x Pins 7 & 8 closed CPU SPEED SELECTION (IBM 6X86) CPU speed Clock speed Multiplier JP4 150MHz 60MHz 2x Pins 3 & 4 closed 166MHz 66MHz 2x Pins 5 & 6 closed 200MHz 75MHz 2x Pins 7 & 8 closed CPU SPEED SELECTION (CX 6X86L) CPU speed Clock speed Multiplier JP4 150MHz 60MHz 2x Pins 3 & 4 closed 166MHz 66MHz 2x Pins 5 & 6 closed 200MHz 75MHz 2x Pins 7 & 8 closed CPU SPEED SELECTION (IBM 6X86L) CPU speed Clock speed Multiplier JP4 150MHz 60MHz 2x Pins 3 & 4 closed 166MHz 66MHz 2x Pins 5 & 6 closed 200MHz 75MHz 2x Pins 7 & 8 closed CPU SPEED SELECTION (CX 6X86MX) CPU speed Clock speed Multiplier JP4 166MHz 60MHz 2.5x Pins 9 & 10 closed 200MHz 66MHz 2.5x Pins 11 & 12 closed 233MHz 75MHz 2.5x Pins 13 & 14 closed 233MHz 66MHz 3x Pins 15 & 16 closed 266MHz 75MHz 3x Pins 17 & 18 closed 266MHz 66MHz 3.5x Pins 19 & 20 closed CPU SPEED SELECTION (IBM 6X86MX) CPU speed Clock speed Multiplier JP4 166MHz 60MHz 2.5x Pins 9 & 10 closed 200MHz 66MHz 2.5x Pins 11 & 12 closed 233MHz 75MHz 2.5x Pins 13 & 14 closed 233MHz 66MHz 3x Pins 15 & 16 closed 266MHz 75MHz 3x Pins 17 & 18 closed 266MHz 66MHz 3.5x Pins 19 & 20 closed CPU SPEED SELECTION (AM K5) CPU speed Clock speed Multiplier JP4 100MHz 66MHz 1.5x Pins 1 & 2 closed 120MHz 60MHz 2x Pins 3 & 4 closed 133MHz 66MHz 2x Pins 5 & 6 closed 150MHz 60MHz 2.5x Pins 9 & 10 closed 166MHz 66MHz 2.5x Pins 11 & 12 closed 188MHz 75MHz 2.5x Pins 13 & 14 closed 200MHz 66MHz 3x Pins 15 & 16 closed CPU SPEED SELECTION (AM K6) CPU speed Clock speed Multiplier JP4 166MHz 66MHz 2.5x Pins 11 & 12 closed 200MHz 66MHz 3x Pins 15 & 16 closed 233MHz 66MHz 3.5x Pins 19 & 20 closed 266MHz 66MHz 4x Pins 21 & 22 closed 300MHz 60MHz 5x Pins 23 & 24 closed 333MHz 66MHz 5x Pins 25 & 26 closed CPU SPEED SELECTION (INTEL) CPU speed Clock speed Multiplier JP4 100MHz 66MHz 1.5x Pins 1 & 2 closed 120MHz 60MHz 2x Pins 3 & 4 closed 133MHz 66MHz 2x Pins 5 & 6 closed 150MHz 60MHz 2.5x Pins 9 & 10 closed 150MHz 75MHz 2x Pins 7 & 8 closed 166MHz 66MHz 2.5x Pins 11 & 12 closed 188MHz 75MHz 2.5x Pins 13 & 14 closed 200MHz 66MHz 3x Pins 15 & 16 closed CPU SPEED SELECTION (INTEL MMX) CPU speed Clock speed Multiplier JP4 166MHz 66MHz 2.5x Pins 11 & 12 closed 200MHz 66MHz 3x Pins 15 & 16 closed 233MHz 66MHz 3.5x Pins 19 & 20 closed CPU VOLTAGE SELECTION Voltage J18 2.0v Pins 1 & 6 closed 2.1v Pins 5 & 10 closed 2.8v Pins 2 & 7 closed 2.9v Pins 3 & 8 closed 3.2v Pins 4 & 9 closed FLASH BIOS SELECTION Setting J9 J10 » 5v Pins 2 & 3 closed Pins 2 & 3 closed 12v Pins 1 & 2 closed Pins 1 & 2 closed