AMERICAN MEGATRENDS, INC. MEGARUM 758 Processor Pentium II Processor Speed 120/133/150/166/180/200/210/233/240/266MHz Chip Set Unidentified Video Chip Set ATI Maximum Onboard 1GB (EDO supported) Memory Maximum Video 2MB Memory Cache 256/512KB (located on Pentium II CPU) BIOS AMI Dimensions 330mm x 218mm I/O Options 32-bit PCI slots (6), floppy drive interface, green PC connector, IDE interfaces (2), SCSI interfaces (2), Wide SCSI interfaces (2), parallel port, PS/2 mouse interface, serial ports (2), VGA interface, VRM connectors (2), USB connectors (2), CPU Slot 1s (2) NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location PS/2 mouse interface J1 Turbo LED J33 CPU fan power 1 J2 SCSI interface 1 J36 Parallel port J3 SCSI interface 2 J37 Floppy drive J4 IDE interface LED J38 interface CPU fan power 2 J7 SCSI interface LED J40 Serial port 2 J8 Power LED & keylock J41 Serial port 1 J9 Wide SCSI interface 1 J44 IDE interface J10 Wide SCSI interface 2 J45 IDE interface J11 Speaker J46 VGA interface J16 System override J47 connector Green PC connector J18 32-bit PCI slots PC1 - PC6 USB connector 1 J19 CPU Slot 1 SL1 USB connector 2 J20 CPU Slot 2 SL2 Chassis fan power J23 VRM connector 1 VRM1 Reset switch J28 VRM connector 2 VRM2 Chassis intrusion J29 connector Note: The location of J18 is unidentified. USER CONFIGURABLE SETTINGS Function Label Position » Factory configured - do not C1 Unidentified alter » Factory configured - do not C2 Unidentified alter » Factory configured - do not C3 Unidentified alter » PCI IRQ disabled for onboard J13 Closed PCI VGA PCI IRQ enabled for onboard J13 Open PCI VGA » On board video enabled J14 Open On board video disabled J14 Closed » CMOS memory normal operation J35 Open CMOS memory clear J35 Closed DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 8MB (2) 1M x 36 None None None 16MB (2) 1M x 36 (2) 1M x 36 None None 16MB (2) 2M x 36 None None None 24MB (2) 1M x 36 (2) 1M x 36 (2) 1M x 36 None 32MB (2) 1M x 36 (2) 1M x 36 (2) 1M x 36 (2) 1M x 36 32MB (2) 2M x 36 (2) 2M x 36 None None 32MB (2) 4M x 36 None None None 48MB (2) 2M x 36 (2) 2M x 36 (2) 2M x 36 None 64MB (2) 2M x 36 (2) 2M x 36 (2) 2M x 36 (2) 2M x 36 64MB (2) 4M x 36 (2) 4M x 36 None None DRAM CONFIGURATION (CON'T) Size Bank 0 Bank 1 Bank 2 Bank 3 64MB (2) 8M x 36 None None None 96MB (2) 4M x 36 (2) 4M x 36 (2) 4M x 36 None 128MB (2) 4M x 36 (2) 4M x 36 (2) 4M x 36 (2) 4M x 36 128MB (2) 8M x 36 (2) 8M x 36 None None 128MB (2) 16M x None None None 36 192MB (2) 8M x 36 (2) 8M x 36 (2) 8M x 36 None 256MB (2) 8M x 36 (2) 8M x 36 (2) 8M x 36 (2) 8M x 36 256MB (2) 16M x (2) 16M x None None 36 36 256MB (2) 32M x None None None 36 384MB (2) 16M x (2) 16M x (2) 16M x None 36 36 36 512MB (2) 16M x (2) 16M x (2) 16M x (2) 16M x 36 36 36 36 512MB (2) 32M x (2) 32M x None None 36 36 768MB (2) 32M x (2) 32M x (2) 32M x None 36 36 36 1GB (2) 32M x (2) 32M x (2) 32M x (2) 32M x 36 36 36 36 Note: Board accepts EDO memory. Do not use 16M x 36 SIMMs that have more than 36 chips per SIMM. CACHE CONFIGURATION Note: 256KB/512KB cache is located on the Pentium II CPU. CPU SPEED SELECTION Speed J21 J24 120MHz Open Pins 1 & 2, 3 & 4, 5 & 6, 7 & 8 closed 133MHz Closed Pins 1 & 2, 3 & 4, 5 & 6, 7 & 8 closed 150MHz Open Pins 3 & 4, 5 & 6, 7 & 8 closed 166MHz Closed Pins 3 & 4, 5 & 6, 7 & 8 closed 180MHz Open Pins 1 & 2, 5 & 6, 7 & 8 closed 200MHz Closed Pins 1 & 2, 5 & 6, 7 & 8 closed 210MHz Open Pins 5 & 6, 7 & 8 closed 233MHz Closed Pins 5 & 6, 7 & 8 closed 240MHz Open Pins 1 & 2, 3 & 4, 7 & 8 closed 266MHz Closed Pins 1 & 2, 3 & 4, 7 & 8 closed CPU VOLTAGE SELECTION Voltage J5 J15 1.8v 1 & 2, 3 & 4, 7 & 8 1 & 2, 3 & 4, 7 & 8 1.85v 1 & 2, 3 & 4, 7 & 8, 1 & 2, 3 & 4, 7 & 8, 9 & 10 9 & 10 1.9v 1 & 2, 3 & 4, 5 & 6 1 & 2, 3 & 4, 5 & 6 1.95v 1 & 2, 3 & 4, 5 & 6, 1 & 2, 3 & 4, 5 & 6, 9 & 10 9 & 10 2.0v 1 & 2, 3 & 4, 5 & 6, 1 & 2, 3 & 4, 5 & 6, 7 & 8 7 & 8 2.05v 1 & 2, 3 & 4, 5 & 6, 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10 7 & 8, 9 & 10 2.1v 9 & 10 9 & 10 2.2v 7 & 8 7 & 8 2.3v 7 & 8, 9 & 10 7 & 8, 9 & 10 2.4v 5 & 6 5 & 6 2.5v 5 & 6, 9 & 10 5 & 6, 9 & 10 2.6v 5 & 6, 7 & 8 5 & 6, 7 & 8 2.7v 5 & 6, 7 & 8, 9 & 10 5 & 6, 7 & 8, 9 & 10 2.8v 3 & 4 3 & 4 2.9v 3 & 4, 9 & 10 3 & 4, 9 & 10 3.0v 3 & 4, 7 & 8 3 & 4, 7 & 8 3.1v 3 & 4, 7 & 8, 9 & 10 3 & 4, 7 & 8, 9 & 10 3.2v 3 & 4, 5 & 6 3 & 4, 5 & 6 » 3.3v 3 & 4, 5 & 6, 9 & 10 3 & 4, 5 & 6, 9 & 10 3.4v 3 & 4, 5 & 6, 7 & 8 3 & 4, 5 & 6, 7 & 8 3.5v 3 & 4, 5 & 6, 7 & 8, 3 & 4, 5 & 6, 7 & 8, 9 & 10 9 & 10 Note: Pins designated should be in the closed position. J5 controls Slot 1 & J15 controls Slot 2.