M TECHNOLOGY, INC. R557MIG Processor CX M1/IBM/AM K5/AM K6/Pentium Processor Speed 90/100/120/133/150/166/180/200/233MHz Chip Set Intel Video Chip Set None Maximum Onboard 256MB (EDO supported) Memory Maximum Video None Memory Cache 512KB BIOS Award Dimensions 304mm x 244mm 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 connectors (2), ATX power connector NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location ATX power connector ATX Power LED & keylock J1 Serial port 2 CN1 Speaker J2 Parallel port CN2 Reset switch J3 PS/2 mouse port CN3 IDE interface LED J4 Serial port 1 CN4 Green PC connector J5 Floppy drive interface CN5 32-bit PCI slots PC1 – PC4 IDE interface 1 CN6 USB connector 1 USB1 IDE interface 2 CN7 USB connector 2 USB2 IR connector IR1 USER CONFIGURABLE SETTINGS Function Label Position » Factory configured - do not JP3 Unidentified alter DRAM 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 128MB (2) 16M x 36 None 136MB (2) 16M x 36 (2) 1M x 36 144MB (2) 16M x 36 (2) 2M x 36 160MB (2) 16M x 36 (2) 4M x 36 192MB (2) 16M x 36 (2) 8M x 36 256MB (2) 16M x 36 (2) 16M x 36 Note: Board accepts EDO memory. Board also accepts x 32 SIMMs. Banks are interchangeable. 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 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 DRAM VOLTAGE CONFIGURATION Voltage JP12 3.3v Pins 3 & 5, 4 & 6 closed 5v Pins 1 & 3, 2 & 4 closed CACHE CONFIGURATION Size Bank 0 TAG 512KB (2) 64K x 32 Unidentified CPU SPEED SELECTION (CYRIX) CPU Clock Multiplier JP1 JP2 JP4 JP8 JP9 speed speed 133MHz 55MHz 2x Closed Open Open Closed Closed 150MHz 60MHz 2x Closed Open Closed Closed Open 166MHz 66MHz 2x Closed Open Open Open Open 200MHz 75MHz 2x Closed Open Open Open Closed CPU SPEED SELECTION (IBM) CPU Clock Multiplier JP1 JP2 JP4 JP8 JP9 speed speed 133MHz 55MHz 2x Closed Open Open Closed Closed 150MHz 60MHz 2x Closed Open Closed Closed Open 166MHz 66MHz 2x Closed Open Open Open Open 200MHz 75MHz 2x Closed Open Open Open Closed CPU SPEED SELECTION (AM K5) CPU Clock Multiplier JP1 JP2 JP4 JP8 JP9 speed speed 90MHz 60MHz 1.5x Open Open Closed Closed Open 100MHz 66MHz 1.5x Open Open Open Open Open 166MHz 66MHz 2.5x Closed Closed Open Open Open CPU SPEED SELECTION (AMD K6) CPU Clock Multiplier JP1 JP2 JP4 JP8 JP9 speed speed 166MHz 66MHz 2.5x Closed Closed Open Open Open 200MHz 66MHz 3x Open Closed Open Open Open 233MHz 66MHz 3.5x Open Open Open Open Open CPU SPEED SELECTION (INTEL) CPU Clock Multiplier JP1 JP2 JP4 JP8 JP9 speed speed 90MHz 60MHz 1.5x Open Open Closed Closed Open 100MHz 66MHz 1.5x Open Open Open Open Open 120MHz 60MHz 2x Closed Open Closed Closed Open 133MHz 66MHz 2x Closed Open Open Open Open 150MHz 60MHz 2.5x Closed Closed Closed Closed Open 166MHz 66MHz 2.5x Closed Closed Open Open Open 180MHz 60MHz 3x Open Closed Closed Closed Open 200MHz 66MHz 3x Open Closed Open Open Open CPU VOLTAGE SELECTION (SINGLE) Voltage JP7 JP19 3.4v Pins 1 & 2, 3 & 4, 5 Pins 3 & 4 closed & 6 closed 3.5v Pins 1 & 2, 3 & 4, 5 Pins 1 & 2 closed & 6 closed CPU VOLTAGE SELECTION (DUAL) V core JP7 JP19 2.5v Open Pins 11 & 12 closed 2.8v Open Pins 9 & 10 closed 2.9v Open Pins 7 & 8 closed 3.2v Open Pins 5 & 6 closed FLASH BIOS SELECTION Setting JP17 JP18 2M/5v Pins 1 & 2 closed Pins 1 & 2 closed 1M/5v Pins 1 & 2 closed Pins 2 & 3 closed