VEXTREC TECHNOLOGY, INC. GMB-P56IAX (VER. 1.02) Device Type Mainboard Processor CX 6X86/AM K5/Pentium/Pentium MMX Processor Speed 75/90/100/120/133/150/166/200MHz Chip Set Intel 430VX Maximum Onboard 128MB (EDO & SDRAM supported) Memory Cache 256/512KB BIOS AMI/Award I/O Options 32-bit PCI slots (4), floppy drive interface, IDE interface (2), parallel port, PS/2 mouse port, serial ports (2), cache slot, IR connector, USB connector (2) Dimensions 305mm x 210mm [Image] CONNECTIONS Purpose Location Purpose Location ATX power supply ATX IR connector J10 Reset switch J1 USB connector 1 J11 Green PC connector J2 USB connector 2 J12 Suspend LED J3 Serial port 2 J14 Speaker J4 Parallel port J15 IDE interface LED J5 PS/2 mouse port J16 Power LED & keylock J6 Serial port 1 J18 IDE interface 2 J7 Power switch JP4 IDE interface 1 J8 32-bit PCI slots PC1 - PC4 Floppy drive interface J9 Cache slot SL1 USER CONFIGURABLE SETTINGS Function Label Position » CMOS memory normal operation JP1 Open CMOS memory clear JP1 Closed Flash BIOS voltage select 12v JP2 Pins 1 & 2 closed Flash BIOS voltage select 5v JP2 Pins 2 & 3 closed DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 4MB (2) 512KB x 32 None None 8MB (2) 512KB x 32 (2) 512KB x 32 None 8MB (2) 1MB x 32 None None 16MB (2) 1MB x 32 (2) 1MB x 32 None 16MB (2) 2MB x 32 None None 24MB (2) 1MB x 32 (2) 1MB x 32 (1) 1MB x 64 24MB (2) 2MB x 32 (2) 1MB x 32 None 32MB (2) 2MB x 32 (2) 2MB x 32 None 32MB (2) 4MB x 32 None None 40MB (2) 2MB x 32 (2) 2MB x 32 (1) 1MB x 64 40MB (2) 4MB x 32 (2) 1MB x 32 None 48MB (2) 2MB x 32 (2) 2MB x 32 (1) 2MB x 64 48MB (2) 4MB x 32 (2) 2MB x 32 None 64MB (2) 4MB x 32 (2) 4MB x 32 None 64MB (2) 8MB x 32 None None 72MB (2) 4MB x 32 (2) 4MB x 32 (1) 1MB x 64 72MB (2) 8MB x 32 (2) 1MB x 32 None 80MB (2) 4MB x 32 (2) 4MB x 32 (1) 2MB x 64 80MB (2) 8MB x 32 (2) 2MB x 32 None 96MB (2) 4MB x 32 (2) 4MB x 32 (1) 4MB x 64 96MB (2) 8MB x 32 (2) 4MB x 32 None 128MB (2) 8MB x 32 (2) 8MB x 32 None Note: Board accepts EDO and SDRAM. DRAM JUMPER CONFIGURATION Voltage S7 S8 3.3v Pins 2 & 3 closed Pins 2 & 3 closed 5v Pins 1 & 2 closed Pins 1 & 2 closed CACHE CONFIGURATION 256KB onboard, upgradeable to 512KB by inserting a cache module in SL1. CPU SPEED SELECTION (CX 6X86) Speed Clock Multiplier JP11 JP12 S1 S2 S3 speed 120MHz 50MHz 2x 2 & 1 & Closed Closed Open 3 2 133MHz 55MHz 2x 2 & 1 & Open Closed Open 3 2 150MHz 60MHz 2x 2 & 1 & Closed Open Open 3 2 166MHz 66MHz 2x 2 & 1 & Open Open Open 3 2 200MHz 66MHz 2.5x 2 & 1 & Open Open Closed 3 2 Note: Numbers designate pins that should be closed. CPU SPEED SELECTION (AM K5) Speed Clock Multiplier JP11 JP12 S1 S2 S3 speed 75MHz 50MHz 1.5x 1 & 1 & Closed Closed Open 2 2 90MHz 60MHz 1.5x 1 & 1 & Closed Open Open 2 2 100MHz 66MHz 1.5x 1 & 1 & Open Open Open 2 2 120MHz 60MHz 2x 1 & 1 & Closed Open Open 2 2 133MHz 66MHz 2x 1 & 1 & Open Open Open 2 2 150MHz 60MHz 2.5x 1 & 1 & Open Open Open 2 2 166MHz 66MHz 2.5x 2 & 2 & Open Open Open 3 3 Note: Numbers designate pins that should be closed. CPU SPEED SELECTION (PENTIUM) Speed Clock Multiplier JP11 JP12 S1 S2 S3 speed 75MHz 50MHz 1.5x 1 & 1 & Closed Closed Open 2 2 90MHz 60MHz 1.5x 1 & 1 & Closed Open Open 2 2 100MHz 66MHz 1.5x 1 & 1 & Open Open Open 2 2 120MHz 60MHz 2x 2 & 1 & Closed Open Open 3 2 133MHz 66MHz 2x 2 & 1 & Open Open Open 3 2 150MHz 60MHz 2.5x 2 & 2 & Closed Open Open 3 3 166MHz 66MHz 2.5x 2 & 2 & Open Open Open 3 3 200MHz 66MHz 3x 1 & 2 & Open Open Open 2 3 Note: Numbers designate pins that should be closed. CPU SPEED SELECTION (PENTIUM MMX) Speed Clock Multiplier JP11 JP12 S1 S2 S3 speed 150MHz 60MHz 2.5x 2 & 2 & Closed Open Open 3 3 166MHz 66MHz 2.5x 2 & 2 & Open Open Open 3 3 200MHz 66MHz 3x 1 & 2 & Open Open Open 2 3 Note: Numbers designate pins that should be closed. CPU VOLTAGE SELECTION (SINGLE) Voltage JP8 S4 S5 S6 3.4v Closed Closed Closed Closed 3.5v Open Closed Closed Closed CPU VOLTAGE SELECTION (DUAL) Voltage (core) JP8 S4 S5 S6 2.8v Closed Open Open Open