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P55-VA
EPOX COMPUTER CO., LTD.
P55-VA
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Processor
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CX M1/AM K5/Pentium
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Processor Speed
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75/90/100/120/133/150/166/180/200MHz
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Chip Set
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Intel
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Video Chip Set
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None
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Maximum Onboard Memory
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128MB (EDO supported)
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Maximum Video Memory
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None
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Cache
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256/512KB
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BIOS
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Award
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Dimensions
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330mm x 218mm
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I/O Options
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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
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NPU Options
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None
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CONNECTIONS
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Purpose
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Location
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Purpose
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Location
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ATX power connector
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ATX
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Power on connector
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J3
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PS/2 mouse port
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CN1
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Power LED & keylock
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J4 pins 1 - 5
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Serial port 1
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CN3
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Speaker
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J4 pins 7 - 10
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Parallel port
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CN4
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Reset switch
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J4 pins 12 & 13
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Serial port 2
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CN5
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Turbo LED
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J4 pins 15 & 16
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USB connector
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CN6
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Green PC connector
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J4 pins 18 & 19
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Floppy drive interface
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CN7
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Green PC LED
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J4 pins 21 & 22
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IDE interface 1
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CN8
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IDE interface LED
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J4 pins 24 & 25
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IDE interface 2
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CN9
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32-bit PCI slots
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PC1 - PC4
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Chassis fan power
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J1
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Cache slot
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SL1
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IR connector
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J2
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USER CONFIGURABLE SETTINGS
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Function
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Label
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Position
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Flash BIOS voltage select 12v
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JP1
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Pins 2 & 3 closed
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Flash BIOS voltage select 5v
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JP1
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Pins 1 & 2 closed
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»
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CMOS memory normal operation
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JP5
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Pins 1 & 2 closed
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CMOS memory clear
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JP5
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Pins 2 & 3 closed
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DRAM CONFIGURATION
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Size
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Bank 0
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Bank 1
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Bank 2
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Bank 3
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8MB
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(2) 1M x 36
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None
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None
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None
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8MB
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None
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None
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(1) 1M x 64
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None
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16MB
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(2) 1M x 36
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(2) 1M x 36
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None
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None
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16MB
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(2) 2M x 36
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None
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None
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None
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16MB
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(2) 1M x 36
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None
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(1) 1M x 64
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None
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16MB
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None
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None
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(1) 2M x 64
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None
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24MB
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(2) 2M x 36
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(2) 1M x 36
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None
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None
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24MB
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(2) 1M x 36
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None
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(1) 2M x 64
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None
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32MB
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(2) 2M x 36
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(2) 2M x 36
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None
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None
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32MB
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(2) 4M x 36
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None
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None
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None
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32MB
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(2) 2M x 36
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None
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(1) 2M x 64
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None
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32MB
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None
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None
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(1) 4M x 64
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None
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32MB
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(2) 1M x 36
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(2) 1M x 36
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(1) 1M x 64
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(1) 1M x 64
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40MB
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(2) 4M x 36
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(2) 1M x 36
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None
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None
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40MB
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(2) 4M x 36
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None
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(1) 1M x 64
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None
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48MB
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(2) 2M x 36
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(2) 4M x 36
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None
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None
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48MB
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(2) 2M x 36
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None
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(1) 4M x 64
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None
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64MB
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(2) 4M x 36
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(2) 4M x 36
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None
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None
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64MB
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(2) 8M x 36
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None
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None
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None
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64MB
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(2) 4M x 36
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None
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(1) 4M x 64
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None
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64MB
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None
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None
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(1) 8M x 64
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None
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DRAM CONFIGURATION (CON’T)
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Size
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Bank 0
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Bank 1
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Bank 2
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Bank 3
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72MB
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(2) 1M x 36
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(2) 8M x 36
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None
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None
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72MB
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(2) 1M x 36
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None
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(1) 8M x 64
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None
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72MB
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(2) 2M x 36
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(2) 2M x 36
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(1) 1M x 64
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(1) 4M x 64
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80MB
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(2) 2M x 36
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(2) 8M x 36
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None
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None
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80MB
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(2) 2M x 36
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None
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(1) 8M x 64
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None
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80MB
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(2) 4M x 36
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(2) 4M x 36
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(1) 1M x 64
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(1) 1M x 64
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96MB
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(2) 4M x 36
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(2) 8M x 36
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None
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None
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96MB
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(2) 4M x 36
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None
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(1) 8M x 64
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None
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96MB
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(2) 2M x 36
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(2) 2M x 36
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(1) 4M x 64
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(1) 4M x 64
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104MB
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(2) 4M x 36
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(2) 4M x 36
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(1) 1M x 64
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(1) 4M x 64
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128MB
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(2) 8M x 36
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(2) 8M x 36
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None
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None
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128MB
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(2) 8M x 36
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None
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(1) 8M x 64
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None
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128MB
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(2) 4M x 36
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(2) 4M x 36
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(1) 4M x 64
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(1) 4M x 64
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Note: Board accepts EDO memory. Banks are interchangeable.
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CACHE CONFIGURATION
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Size
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Bank 0
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SL1
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TAG
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256KB
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(2) 32K x 32
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Not installed
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Unidentified
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512KB
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(2) 32K x 32
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Installed
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Unidentified
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512KB
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(2) 64K x 32
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Not installed
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Unidentified
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CPU SPEED SELECTION (CYRIX)
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CPU speed
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Clock speed
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Multiplier
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JP8
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120MHz
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50MHz
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2x
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Pins 10 & 23 closed
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133MHz
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55MHz
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2x
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Pins 13 & 26 closed
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150MHz
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60MHz
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2x
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Pins 4 & 17 closed
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166MHz
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66MHz
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2x
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Pins 5 & 18 closed
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200MHz
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75MHz
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2x
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Pins 12 & 25 closed
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CPU SPEED SELECTION (INTEL)
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CPU speed
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Clock speed
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Multiplier
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JP8
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75MHz
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50MHz
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1.5x
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Pins 1 & 14 closed
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90MHz
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60MHz
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1.5x
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Pins 2 & 15 closed
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100MHz
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66MHz
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1.5x
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Pins 3 & 16 closed
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120MHz
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60MHz
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2x
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Pins 4 & 17 closed
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133MHz
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66MHz
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2x
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Pins 5 & 18 closed
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150MHz
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60MHz
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2.5x
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Pins 6 & 19 closed
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166MHz
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66MHz
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2.5x
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Pins 7 & 20 closed
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180MHz
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60MHz
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3x
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Pins 8 & 21 closed
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200MHz
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66MHz
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3x
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Pins 9 & 22 closed
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CPU TYPE SELECTION
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Type
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JP3A
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JP3B
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JP3C
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CX M1
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Pins 1 & 2 closed
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Pins 1 & 2 closed
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Pins 1 & 2 closed
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AM K5
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Pins 1 & 2 closed
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Pins 1 & 2 closed
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Pins 1 & 2 closed
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P54C/CTB
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Pins 1 & 2 closed
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Pins 1 & 2 closed
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Pins 1 & 2 closed
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P55C
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Pins 2 & 3 closed
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Pins 2 & 3 closed
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Pins 2 & 3 closed
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CPU VOLTAGE SELECTION
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Voltage
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JP4
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2.5v
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Pins 1 & 2 closed
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2.8v
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Pins 2 & 3 closed
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2.9v
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Open
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MISCELLANEOUS TECHNICAL NOTE
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If 200MHz Cyrix chip is installed, do not install the COAST module. Also, do not install a PCI 2.0 SCSI card. Either of the above cases will cause the mainboard to lock up. A PCI 2.1 SCSI card may be installed with no problems.
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