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Chapter 1: Motherboard Information
North bridge controller. The VIA
®
KT400 supports AGP 8X mode, 333/
266/200MHz Front Side Bus, and the latest 400/333/266/200MHz 64-bit
memory bus.
CPU socket. Socket 462 (Socket A) surface mount, Zero Insertion Force
(ZIF) socket for the AMD Barton/Thoroughbred/Athlon XP/Athlon/Duron
Processors, with 600 MHz ~ 2.25GHz system bus. (Note: When using
333MHz FSB CPU, system memory supports DDR333 only.)
DDR DIMM sockets. These three 184-pin DIMM sockets support up to 3GB
system memory using unbuffered non-ECC PC2100/1600 DDR DIMMs.
(Note: PC2700 maximum to 4 banks only. PC3200 maximum to 2 banks
only. Visit the ASUS website [www.asus.com] for the latest qualified DDR400
module list.)
ATX power connector. This 20-pin connector connects to an ATX +12V
power supply. The power supply must have at least 1A on the +5V standby
lead (+5VSB).
IDE connectors. These dual-channel bus master IDE connectors support
up to four Ultra DMA133/100/66, PIO Modes 3 & 4 IDE devices. Both the
primary (blue) and secondary (black) connectors are slotted to prevent
incorrect insertion of the IDE ribbon cable.
Floppy disk connector. This connector accommodates the provided
ribbon cable for the floppy disk drive. One side of the connector is slotted
to prevent incorrect insertion of the floppy disk cable.
South bridge controller. The VIA
®
VT8235 integrated peripheral controller
supports various I/O functions including, 2-channel ATA/133 bus master
IDE controller, up to six USB 2.0 ports, LPC Super I/O interface, AC’97
interface and PCI 2.2 interface.
Flash ROM. This 2Mb firmware contains the programmable BIOS
program.
Standby power LED. This LED lights up if there is a standby power on the
motherboard. This LED acts as a reminder to turn off the system power
before plugging or unplugging devices.
Super I/O controller. This Low Pin Count (LPC) interface provides the
commonly used Super I/O functionality. The chipset supports a high-
performance floppy disk controller for a 360K/720K/1.44M/2.88M floppy
disk drive, a multi-mode parallel port, two standard compatible UARTs and
a Flash ROM interface.
PCI slots. These six 32-bit PCI 2.2 expansion slots support bus master
PCI cards like SCSI or LAN cards with 133MB/s maximum throughput.
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1.3.1 Core specifications
FSB DDR 266 DDR 333 DDR 400
200/266 MHz
333 MHz
TABLE 1.3.1
FSB/DDR
Support Table
3