EPOX COMPUTER CO., LTD. P55-VA Processor CX M1/AM K5/Pentium Processor Speed 75/90/100/120/133/150/166/180/200MHz Chip Set Intel Video Chip Set None Maximum Onboard 128MB (EDO supported) Memory Maximum Video None Memory Cache 256/512KB BIOS Award Dimensions 330mm x 218mm 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), cache slot, IR connector, USB connector, ATX power connector NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location ATX power ATX Power on connector J3 connector PS/2 mouse port CN1 Power LED & J4 pins 1 - 5 keylock Serial port 1 CN3 Speaker J4 pins 7 - 10 Parallel port CN4 Reset switch J4 pins 12 & 13 Serial port 2 CN5 Turbo LED J4 pins 15 & 16 USB connector CN6 Green PC connector J4 pins 18 & 19 Floppy drive CN7 Green PC LED J4 pins 21 & interface 22 IDE interface 1 CN8 IDE interface LED J4 pins 24 & 25 IDE interface 2 CN9 32-bit PCI slots PC1 - PC4 Chassis fan power J1 Cache slot SL1 IR connector J2 USER CONFIGURABLE SETTINGS Function Label Position Flash BIOS voltage select 12v JP1 Pins 2 & 3 closed Flash BIOS voltage select 5v JP1 Pins 1 & 2 closed » CMOS memory normal operation JP5 Pins 1 & 2 closed CMOS memory clear JP5 Pins 2 & 3 closed DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 8MB (2) 1M x 36 None None None 8MB None None (1) 1M x 64 None 16MB (2) 1M x 36 (2) 1M x 36 None None 16MB (2) 2M x 36 None None None 16MB (2) 1M x 36 None (1) 1M x 64 None 16MB None None (1) 2M x 64 None 24MB (2) 2M x 36 (2) 1M x 36 None None 24MB (2) 1M x 36 None (1) 2M x 64 None 32MB (2) 2M x 36 (2) 2M x 36 None None 32MB (2) 4M x 36 None None None 32MB (2) 2M x 36 None (1) 2M x 64 None 32MB None None (1) 4M x 64 None 32MB (2) 1M x 36 (2) 1M x 36 (1) 1M x 64 (1) 1M x 64 40MB (2) 4M x 36 (2) 1M x 36 None None 40MB (2) 4M x 36 None (1) 1M x 64 None 48MB (2) 2M x 36 (2) 4M x 36 None None 48MB (2) 2M x 36 None (1) 4M x 64 None 64MB (2) 4M x 36 (2) 4M x 36 None None 64MB (2) 8M x 36 None None None 64MB (2) 4M x 36 None (1) 4M x 64 None 64MB None None (1) 8M x 64 None DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 Bank 3 72MB (2) 1M x 36 (2) 8M x 36 None None 72MB (2) 1M x 36 None (1) 8M x 64 None 72MB (2) 2M x 36 (2) 2M x 36 (1) 1M x 64 (1) 4M x 64 80MB (2) 2M x 36 (2) 8M x 36 None None 80MB (2) 2M x 36 None (1) 8M x 64 None 80MB (2) 4M x 36 (2) 4M x 36 (1) 1M x 64 (1) 1M x 64 96MB (2) 4M x 36 (2) 8M x 36 None None 96MB (2) 4M x 36 None (1) 8M x 64 None 96MB (2) 2M x 36 (2) 2M x 36 (1) 4M x 64 (1) 4M x 64 104MB (2) 4M x 36 (2) 4M x 36 (1) 1M x 64 (1) 4M x 64 128MB (2) 8M x 36 (2) 8M x 36 None None 128MB (2) 8M x 36 None (1) 8M x 64 None 128MB (2) 4M x 36 (2) 4M x 36 (1) 4M x 64 (1) 4M x 64 Note: Board accepts EDO memory. Banks are interchangeable. CACHE CONFIGURATION Size Bank 0 SL1 TAG 256KB (2) 32K x 32 Not installed Unidentified 512KB (2) 32K x 32 Installed Unidentified 512KB (2) 64K x 32 Not installed Unidentified CPU SPEED SELECTION (CYRIX) CPU speed Clock speed Multiplier JP8 120MHz 50MHz 2x Pins 10 & 23 closed 133MHz 55MHz 2x Pins 13 & 26 closed 150MHz 60MHz 2x Pins 4 & 17 closed 166MHz 66MHz 2x Pins 5 & 18 closed 200MHz 75MHz 2x Pins 12 & 25 closed CPU SPEED SELECTION (INTEL) CPU speed Clock speed Multiplier JP8 75MHz 50MHz 1.5x Pins 1 & 14 closed 90MHz 60MHz 1.5x Pins 2 & 15 closed 100MHz 66MHz 1.5x Pins 3 & 16 closed 120MHz 60MHz 2x Pins 4 & 17 closed 133MHz 66MHz 2x Pins 5 & 18 closed 150MHz 60MHz 2.5x Pins 6 & 19 closed 166MHz 66MHz 2.5x Pins 7 & 20 closed 180MHz 60MHz 3x Pins 8 & 21 closed 200MHz 66MHz 3x Pins 9 & 22 closed CPU TYPE SELECTION Type JP3A JP3B JP3C CX M1 Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 closed closed closed AM K5 Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 closed closed closed P54C/CTB Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 closed closed closed P55C Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 closed closed closed CPU VOLTAGE SELECTION Voltage JP4 2.5v Pins 1 & 2 closed » 2.8v Pins 2 & 3 closed 2.9v Open MISCELLANEOUS TECHNICAL NOTE If 200MHz Cyrix chip is installed, do not install the COAST module. Also, do not install a PCI 2.0 SCSI card. Either of the above cases will cause the mainboard to lock up. A PCI 2.1 SCSI card may be installed with no problems.