This document describes the VIA KM400 mainboard series products, which are suitable for AMD Socket A processors. The features include support for AMD Athlon XP processors, VIA Unichrome Graphics core, and a maximum memory size of up to 2GB.
This manual covers the VIA KM400 motherboard, designed for AMD Socket A processors. It includes detailed specifications, supported features, and step‑by‑step installation guidance.
Key sections include hardware specifications, CPU and memory installation, VGA/PCI card setup, rear I/O description, internal connector details, and BIOS update instructions.
| Processor support | 462‑pin Socket A, AMD Athlon XP, 266/333 MHz FSB |
|---|---|
| Chipset | VIA KM400 + VT8237 with VIA Unichrome graphics core |
| Memory slots | Two 184‑pin DDR DIMM sockets, PC2100/PC2700 (DDR266/333) |
| Maximum memory | Up to 2 GB DDR SDRAM |
| BIOS | Flash EEPROM with Award BIOS, ACPI v2.0, SMBIOS v2.2 |
| LAN controller | 10/100 Mbps Fast Ethernet controller with VIA 6103 PHY |
| Audio | Six‑channel Realtek ALC655 AC’97 codec, analog & digital outputs |
| Expansion slots | One AGP 3.0 (1.5 V 8X), three PCI 2.2, one CNR slot |
| Form factor | Micro‑ATX, 244 mm × 220 mm |
It supports a 462‑pin Socket A for AMD Athlon XP processors.
The board has two 184‑pin DDR DIMM sockets and can hold up to 2 GB of DDR SDRAM.
Download the provided .EXE file, run it to extract the BIOS files, copy them to a floppy and execute the flash utility as instructed.
A 10/100 Mbps Fast Ethernet controller with an onboard VIA 6103 PHY is integrated.