ACER, INC. AX53 Device Type Mainboard Processor CX 6X86/AM K5/AM K6/Pentium/Pentium MMX Processor Speed 75/90/100/120/133/150/166/200MHz Chip Set Intel Video Chip Set None Maximum Onboard 512MB (EDO & SDRAM supported) Memory Maximum Video Memory None Cache 256/512KB BIOS AMI Dimensions 284mm 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), cache slot, IR connector, USB connector, ATX power connector NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location ATX power connector ATX IDE interface LED CN13 Serial port 2 C1 USB connector CN14 Parallel port C2 Power LED & CN15/pins 1 - 5 keylock PS/2 mouse port C3 Speaker CN15/pins 7 - 10 Serial port 1 CN1 Green PC LED CN15/pins 12 & 13 CPU fan power CN5 Green PC CN15/pins 15 - connector 17 Floppy drive CN6 Reset switch CN15/pins 19 & interface 20 IDE interface 2 CN9 32-bit PCI slots PC1 - PC4 IDE interface 1 CN10 Cache slot SL1 IR connector CN12 USER CONFIGURABLE SETTINGS Function Label Position » ATX power supply enabled JP1 Pins 2 & 3 closed ATX power supply disabled JP1 Pins 1 & 2 closed » CMOS memory normal operation JP9 Pins 1 & 2 closed CMOS memory clear JP9 Pins 2 & 3 closed » On board I/O enabled JP12 Pins 1 & 2 closed On board I/O disabled JP12 Pins 2 & 3 closed » Factory configured - do not JP13 Unidentified alter » PS/2 mouse enabled JP14 Closed PS/2 mouse disabled JP14 Open » Keyboard clock select ISA JP15 Pins 1 & 2 closed clock Keyboard clock select 12MHz JP15 Pins 3 & 4 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 SIMM CONFIGURATION (CON'T) Size Bank 0 Bank 1 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 256MB (2) 32M x 36 None 264MB (2) 32M x 36 (2) 1M x 36 272MB (2) 32M x 36 (2) 2M x 36 288MB (2) 32M x 36 (2) 4M x 36 320MB (2) 32M x 36 (2) 8M x 36 384MB (2) 32M x 36 (2) 16M x 36 512MB (2) 32M x 36 (2) 32M x 36 Note: Board accepts EDO memory. CACHE CONFIGURATION Size Bank 0 SL1 256KB (2) 32K x 32 Not installed 512KB (2) 32K x 32 256KB module installed CACHE JUMPER CONFIGURATION Size JP7 256KB Pins 1 & 2 closed 512KB Pins 2 & 3 closed CACHE MODULE CONFIGURATION Type JP16 Module with TAG Pins 2 & 3 closed Module without TAG Pins 1 & 2 closed CPU SPEED SELECTION (CX 6X86) CPU Clock Multiplier JP2 JP4 JP5 JP8 speed speed 120MHz 50MHz 2x Open 1 & 2, Open 1 & 2, 3 & 4, 3 & 4 5 & 6 133MHz 55MHz 2x Open 1 & 2, Open Open 3 & 4, 5 & 6 150MHz 60MHz 2x Open 1 & 2, Open 1 & 2 3 & 4, 5 & 6 Note: Pins designated should be in the closed position. CPU SPEED SELECTION (AM K5) CPU Clock Multiplier JP2 JP4 JP5 JP8 speed speed 75MHz 50MHz 1.5x 1 & 2 1 & 2, Open 1 & 2, 3 & 4, 3 & 4 5 & 6 90MHz 60MHz 1.5x 1 & 2 1 & 2, Open 1 & 2 3 & 4, 5 & 6 100MHz 66MHz 1.5x 1 & 2 1 & 2, Open 3 & 4 3 & 4, 5 & 6 Note: Pins designated should be in the closed position. CPU SPEED SELECTION (INTEL) CPU Clock Multiplier JP2 JP4 JP5 JP8 speed speed 75MHz 50MHz 1.5x 1 & 1 & 2, Open 1 & 2, 2, 3 3 & 4, 3 & 4 & 4 5 & 6 90MHz 60MHz 1.5x 1 & 1 & 2, Open 1 & 2 2, 3 3 & 4, & 4 5 & 6 100MHz 66MHz 1.5x 1 & 1 & 2, Open 3 & 4 2, 3 3 & 4, & 4 5 & 6 120MHz 60MHz 2x 3 & 1 & 2, Open 1 & 2 4, 5 3 & 4, & 6 5 & 6 133MHz 66MHz 2x 3 & 1 & 2, Open 3 & 4 4, 5 3 & 4, & 6 5 & 6 150MHz 60MHz 2.5x 5 & 1 & 2, Open 1 & 2 6, 7 3 & 4, & 8 5 & 6 166MHz 66MHz 2.5x 5 & 1 & 2, Open 3 & 4 6, 7 3 & 4, & 8 5 & 6 200MHz 66MHz 3x 1 & 1 & 2, Open 3 & 4 2, 7 3 & 4, & 8 5 & 6 Note: Pins designated should be in the closed position. CPU SPEED SELECTION (INTEL MMX) CPU Clock Multiplier JP2 JP4 JP5 JP8 speed speed 150MHz 60MHz 2.5x 5 & Open 1 & 1 & 2 6, 7 2, 3 & 8 & 4 166MHz 66MHz 2.5x 5 & Open 1 & 3 & 4 6, 7 2, 3 & 8 & 4 200MHz 66MHz 3x 1 & Open 1 & 3 & 4 2, 7 2, 3 & 8 & 4 Note: Pins designated should be in the closed position. CPU VOLTAGE SELECTION (SINGLE) Voltage JP6 » 3.45v Pins 1 & 2 closed 3.52v Pins 3 & 4 closed CPU VOLTAGE SELECTION (DUAL) V core JP3 2.5v Pins 11 & 12 closed 2.7v Pins 9 & 10 closed 2.8v Pins 7 & 8 closed 2.9v Pins 5 & 6 closed » 3.43v Pins 3 & 4 closed 3.52v Pins 1 & 2 closed