10

11

DIP switches (DSW1). This 6-switch Dual Inline Package (DIP) allows you to set the CPU external frequency.

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

12Super 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, a Standard Infrared (SIR), one MPU-401 UART mode compatible MIDI/game port, and a Flash ROM interface.

13RAID Ultra ATA/133/100 connectors. These dual-channel connectors support Ultra ATA/133/100/66/33 hard disk drives in RAID 0/RAID 1 configurations. (on RAID models only)

14South 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, PCI 2.2 interface, and integrated LAN controller. The ICH4 also contains the necessary arbitration and buffering for efficient utilization of these interfaces.

15RAID controller. The Promise® PDC20276 RAID controller provides high performance RAID 0/RAID 1 functionality. (on RAID models only)

16Flash EEPROM. This 4Mb firmware contains the programmable BIOS program.

17DIP switches (DSW2). This 4-switch Dual Inline Package (DIP) allows you to select the CPU frequency multiple.

18Standby 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.

ASUS P4B533-E motherboard user guide

1-9