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Mainboard AV40S

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Distinguishing Marks of the Versions

Version differences of Mainboard AV40S

Version AV40S Version 1.0 AV40S Version 3.1A (AV40SV3)
Chipset VIA P4X266A/VT8233 VIA P4X266A/VT8233A
CPU-Support Intel Pentium 4 with 400FSB Intel Pentium 4 with 400 and 533FSB
Slots 1x AGP, 5x PCI, 1x CNR 1x AGP, 4x PCI, 1x CNR
IDE 2x UltraDMA 100 2x UltraDMA 133
USB 2x Backpanel, 4x onboard 2x Backpanel, 2x onboard
Board-color yellow blue
on the Board
Packaging Sticker


  • Chipset
    VIA P4X266A for Pentium 4 processors with socket 478
    Northbridge: VIA P4X266A
    Southbridge: VIA VT8233 (AV40S v1.0) and VIA VT8233A (from AV40S v3.1 on)
  • Socket 478 CPU Support
    Intel Pentium 4 processor (Willamette or Northwood) and P4 Celeron
    with 400MHz FSB (100MHz Quad-Datarate-Process)
    from Board-Version 3.1 on the AV40S supports 533MHz FSB, too
    Normally, there is no need to configure the processor
    successfully tested with: P4 Celeron up to 1,8 GHz, P4 (Willamette 256KB Cache) up to 2,2GHz,
    P4 (Northwood 400MHz FSB) up to 2,5GHz and P4 (Northwood 533MHz FSB) up to 2,8GHz (AV40S v3.x only)
  • Expansion Slots
    1 x AGP Steckplatz supports 4X mode
    5 x 32 Bit PCI (ab Board-Version 3.1 nur 4 PCI-Slots)
    1 x CNR
  • Onboard IDE Controller
    2-Channel Enhanced PCI IDE
    for up to 4 IDE devices
    supports UltraDMA 100 (from Board-Version 3.1 on UltraDMA 133 is supported, too)
  • Integrated Audio Function:
    Software-Audio with AC'97 2.1 conforming CODEC onboard
    The main work is done by software; the CODEC provides the analog signal
    Sound-driver for Windows 9x, ME, 2000 and NT 4.0
    Connectors on the backpanel: line-in, line-out, microphone, MIDI/gameport
    More line-ins on the mainboard Audio-in for CD-ROM, TAD and AUX.
  • Backpanel-connectors
    1 x PS/2-Mouse
    1 x PS/2-Keyboard
    1 x Parallel (SSP/EPP/ECP)
    2 x Serial (16550 kompatibel, Fifo)
    2 x USB (more USB-connectors onboard)
    Audio: line-in, line-out, microphone, MIDI/gameport
  • Onboard-connectors
    1 x Floppy drive (up to 2,88 MB)
    4 x USB (AV40S v1.0), but 2 x USB (from AV40S v3.1 on)
    1 x Infrared (COM2 can be used for infrared communication, IrDA-adapter not included in delivery)
    1 x WOL (Wake on Lan)
    2 x Fan (CPU, AGP, Chipset)
  • Memory
    3 x 184-Pin DIMM-Socket for PC1600 or PC2100 DDR SDRAM memory
    supports module sizes of 64, 128, 256, 512 and 1024MB
    with 100 or 133MHz clock frequency  up to 1,5 GB capacity
    Adjustment of DDR-voltage in BIOS possible.
  • Hardware-monitoring
    CPU-temperature, system voltage and fan revolution can be monitored
  • Power Management
    ACPI Version 1.0 (Advanced Configuration and Power Interface)
    supports power saving modes: S1 (Snoop), S3 (Suspend to RAM), S5 (soft-off)
    On/Off-button with two functions: Suspend-mode / soft-off
  • BIOS
    Award V6.0PG  PnP Green BIOS
    2 MBit Flash EPROM
  • ATX-power supply connector
    Standard 20-Pin-ATX-power supply connector
  • Accessories
    Mainboard with active Northbridge-cooler, IDE-cable (ATA-100), floppy cable, detailed manual, driver CD-ROM
  • Form Factor
    ATX: only 30,5 x 19,0 cm



Socket 478

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