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DIP switches. This 5-pin Dual Inline Package (DIP) switches allows you to select the CPU frequency multiple.

ATX 12V connector. This power connector connects the 4-pin 12V plug from the ATX 12V power supply.

CPU socket. A 478-pin surface mount, Zero Insertion Force (ZIF) socket for the Intel® Pentium® 4 Processor, with 533/400 MHz system bus that allows 4.3GB/s and 3.2GB/s data transfer rates, respectively.

North bridge controller. The Intel® 845GE Graphics Memory Controller Hub (GMCH) provides the processor interface with 533/400 MHz frequency, system memory interface at 333/266MHz operation, and 1.5V AGP interface that supports AGP 2.0 specification including 4X Fast Write protocol. The integrated graphics accelerator delivers 3D/2D video capabilities and a high bandwidth access to graphics data in the system memory at 2.2GB/s or 1.6GB/s. The GMCH interconnects to the south bridge ICH4 via the Intel® proprietary Hub Interface.

5DDR DIMM sockets. These two 184-pin DIMM sockets support up to 2GB system memory using unbuffered non-ECC PC2700/PC2100/PC1600 DDR DIMMs.

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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).

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.

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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.

IDE connectors. These dual-channel bus master IDE connectors support Ultra DMA/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.

Flash ROM. This 2Mb firmware contains the programmable BIOS program.

South bridge controller. The fourth-generation Intel I/O Controller Hub (ICH4) is a subsystem that integrates various I/O functions including 2-channel ATA/100 bus master IDE controller, up to six USB 2.0/1.1 ports, I/O APIC, SMBus 2.0 controller, LPC interface, AC’97 2.2 interface, and PCI 2.2 interface. The ICH4 also contains the necessary arbitration and buffering for efficient utilization of these interfaces.

12ASUS ASIC. This chip performs multiple system functions that include hardware and system voltage monitoring, IRQ routing, among others.

13AGP slot. This Accelerated Graphics Port (AGP) slot supports 1.5V AGP4X mode graphics cards for 3D graphical applications.

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Chapter 1: Product introduction