UNIDENTIFIED 407 Processor 80486SX/80487SX/80486DX/80486DX2/Pentium Overdrive Processor Speed 20/25/33/40/50(internal)/50/66(internal)MHz Chip Set OPTI Max. Onboard DRAM256MB Cache 128/256/1024KB BIOS AMI Dimensions 330mm x 218mm I/O Options 32-bit VESA local bus slots (3) NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location External battery J4 Speaker JP22 Power LED & keylock J6 Reset switch S9 Turbo LED JP15 32-bit VESA local SL1 - SL3 bus slots Turbo switch JP17 USER CONFIGURABLE SETTINGS Function Jumper Position » Monitor type select color JP2 Closed Monitor type select monochrome JP2 Open » VESA clock delay enabled JP12 pins 1 & 2 closed VESA clock delay disabled JP12 pins 2 & 3 closed DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 4MB (1) 1M x 36 NONE NONE NONE 8MB (1) 1M x 36 (1) 1M x 36 NONE NONE 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 NONE 16MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 16MB (1) 4M x 36 NONE NONE NONE 20MB (1) 1M x 36 (1) 4M x 36 NONE NONE 32MB (1) 4M x 36 (1) 4M x 36 NONE NONE 40MB (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 (1) 4M x 36 48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 NONE 64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 64MB (1) 16M x 36 NONE NONE NONE 80MB (1) 4M x 36 (1) 16M x 36 NONE NONE 128MB (1) 16M x 36 (1) 16M x 36 NONE NONE 160MB (1) 4M x 36 (1) 4M x 36 (1) 16M x 36 (1) 16M x 36 192MB (1) 16M x 36 (1) 16M x 36 (1) 16M x 36 NONE 208MB (1) 4M x 36 (1) 16M x 36 (1) 16M x 36 (1) 16M x 36 256MB (1) 16M x 36 (1) 16M x 36 (1) 16M x 36 (1) 16M x 36 CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 128KB (4) 32K x 8 NONE (1) 32K x 8 256KB (4) 32K x 8 (4) 32K x 8 (1) 32K x 8 1MB (4) 128K x 8 (4) 128K x 8 (1) 128K x 8 CACHE JUMPER CONFIGURATION Size JP6 JP7 JP9 JP10 JP13 128KB Open pins 1 & 2 pins 1 & 2 Open Closed closed closed 256KB Open pins 2 & 3 pins 2 & 3 Closed Closed closed closed 1MB Closed pins 2 & 3 pins 2 & 3 Closed Closed closed closed CPU TYPE CONFIGURATION Type JP4 JP5 80486SX pins 2 & 3 closed Open 80487SX pins 1 & 2, 3 & 4 pins 1 & 2 closed closed 80486DX pins 1 & 2, 3 & 4 pins 2 & 3 closed closed 80486DX2 pins 1 & 2, 3 & 4 pins 2 & 3 closed closed Pentium Overdrive pins 1 & 2, 3 & 4 pins 1 & 2 closed closed CPU SPEED CONFIGURATION Speed JPA JPB JPC JP20 JP21 20MHz 1 & 2 2 & 3 2 & 3 2 & 3 2 & 3 25MHz 2 & 3 1 & 2 2 & 3 2 & 3 2 & 3 33MHz 2 & 3 2 & 3 1 & 2 1 & 2 2 & 3 40MHz 1 & 2 1 & 2 2 & 3 2 & 3 1 & 2 50iMHz 2 & 3 1 & 2 2 & 3 2 & 3 2 & 3 50MHz 1 & 2 2 & 3 1 & 2 1 & 2 1 & 2 66iMHz 2 & 3 2 & 3 1 & 2 1 & 2 2 & 3 Note: Pins designated should be in the closed position. ADS# SIGNAL DELAY CONFIGURATION Speed JP3 JP27 20MHz pins 2 & 3 closed pins 2 & 3 closed (normal) (normal) 25MHz pins 2 & 3 closed pins 2 & 3 closed (normal) (normal) 33MHz pins 2 & 3 closed pins 2 & 3 closed (normal) (normal) 33MHz pins 1 & 2 closed pins 2 & 3 closed (delay) (normal) 40MHz pins 1 & 2 closed pins 2 & 3 closed (delay) (normal) 50MHz pins 1 & 2 closed pins 1 & 2 closed (delay) (delay) VESA WAIT STATE CONFIGURATION Wait states JP16 0 wait states Open 1 wait state Closed BUS SPEED CONFIGURATION CPU speed JP11 JP14 <= 33MHz pins 1 & 2, 3 & 4 Open closed > 33MHz pins 2 & 3 closed Closed