Asus P4B-LX - Manual (Page 18)

1-6 Chapter 1: Product introduction
1.4 Special features
Latest processor technology
The P4B-LX motherboard supports the latest Intel Pentium 4 478/
Northwood Processor, also known as P4, via a 478-pin surface mount ZIF
socket. The Pentium 4 processor utilizes the advanced 0.18 micron
processor core in FC-PGA2 package for a 2.0GHz frequency, while the
Northwood processor uses the 0.13 micron processor core with 512KB L2
cache for up to a speedy 2.4GHz frequency. The P4 offers optimized
performance for audio, video, and Internet applications.
Onboard LAN
The motherboard incorporates the RealTek 8100 LAN chip to support
10BASE-T/100BASE-TX Fast Ethernet networking.
Digital audio interface
On audio models, an optical Sony-Philips Digital Interface (SPDIF) is
available on the rear panel to support 5.1-channel surround sound and
enhanced 3D audio.