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Asus P4B266-M User Manual

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Chapter 1: Product introduction

CPU socket. A 478-pin surface mount, Zero Insertion Force (ZIF)
socket called mPGA478 B. This socket accommodates the Intel

®

Pentium

®

4 478/Northwood Processor with 400MHz system bus.

North bridge controller. This controller called the Intel Memory
Controller Hub (MCH) is one of the two major components of the
Intel 845D (Brookdale) chipset. The MCH along with the south
bridge Intel I/O Controller Hub 2 (ICH2) are interconnected through
the Intel proprietary Hub interface. The MCH provides the
processor interface, system memory interface, AGP interface, and
Hub Interface.

DDR DIMM sockets. These two 184-pin DIMM sockets support up
to 2GB using ECC/ non-ECC PC2100/1600 DDR SDRAM DIMMs.

Super I/O chipset. 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, a Standard Infrared (SIR), one MPU-401 UART
mode compatible MIDI/game port, and a Flash ROM interface.

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 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.

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.

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

DIP switches. This 5-switch Dual Inline Package (DIP) allows you
to set the CPU external frequency.

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