VIA® P4X266A & VT8233/A Chipset

Socket 478 for Pentium® 4 processors

Three 168-pin DIMMs with PC133 SDRAM support, up to 1.5GB

AC97 Audio Codec on board

P4VXAS2 V2.X mainboard is an ATX mainboard that uses a 4-layer printed circuit board and measures 305 mm x 190 mm. The mainboard features a Socket 478 that accommodates Intel® Pentium® 4 processors supporting system bus (FSB) speeds of 400/533MHz. The P4VXAS2 incorporates the VIA® VT8753A Northbridge and VT8233A (or VT8233) Southbridge chipsets which combine support PC100, PC133 SDRAM, and the AC' 97 audio codec.

Note: SDRAM provides 800 MBps or 1 GBps data transfer depending on whether the bus is 100MHz or 133MHz.

PROCESSORS

One Socket 478 supports the

Intel Pentium 4 processor (478pins)

CHIPSET

VIA® P4X266A(NB) & VT8233/A(SB)

P4X266A V-Link Host system controller and VT8233/A V-Link Client to PCI/LPC bridge

Peak Bandwidth 266MB/S 8-bit V-link Host Controller

LPC I/O - ITE8705F

System Hardware Monitor: Integrated in ITE8705F

AC97 Audio Codec

Compliant with AC97 2.2 specification

MEMORY

Three 168-pin DIMM sockets for 3.3V SDRAM (PC133/PC100)

Maximum: 1.5GB(unbuffered), 3GB(buffered)

SYSTEM BIOS

Award 2Mb Flash EEPROM

Supports Plug and Play 1.0A, APM 1.2, Multi Boot, DMI

Full Support for ACPI revision 1.0 specification

I/O INTERFACE

Supports Plug and Play function

PS/2 keyboard and PS/2 mouse connectors

Dual USB Ports

One - EPP/ECP mode parallel port

Two - 16550 high-speed serial I/O ports

Audio Ports (Line-in, Line-out, Mic-in, CD-in and game port)

Dual PCI IDE interfaces - support four IDE devices (PIO mode 4, DMA Mode 2, Ultra DMA 66/100, UltraDMA 133 for

8233A)

Supports 360K~2.88M Byte, 3 Mode FDDs or LS120

ATX Power Supply Connector

ports, Headers and Others:

IrDA header

Front Panel MIC/Line-Out header

Additional USB Ports

Four for 8233 (LUSB1/2 or USB2/3)

Two for 8233A (LUSB1 or USB2)

Smart Card reader header

HDD LED, ACPI MSG LED, Reset Switch, Power Switch headers

CPU and Case Fan headers

LAN Card Wake Up/Internal Modem Ring Wake Up headers

RTC & BATTERY

VT8233/A included 256 bytes of CMOS

With CMOS SRAM hardware clear jumper

EXPANSION SLOTS

5 PCI slots, 1 AGP slot, 1 CNR slot

FORM FACTOR

ATX (305mm*190mm), 4 Layers