Intel 683503-305 AL440LX Slot 1 ATX Motherboard AGP PCI ISA LX Chipset

Intel 683503-305 AL440LX Slot 1 ATX Motherboard AGP PCI ISA LX Chipset

The Intel 683503-305 is an ATX system board built around Intel's 440LX AGP chipset (AL440LX). Designed for Slot 1 processors, it supports Intel Pentium II and early Pentium III CPUs in the SEC (Single Edge Contact) cartridge form factor. This was Intel's own reference-design board, produced during the late 1990s peak of the Pentium II platform.

Specifications & What's Included

• Part Number: 683503-305, Revision AA
• Chipset: Intel 440LX (AL440LX) AGP Set
• Form Factor: ATX
• CPU Slot: Slot 1 — supports Intel Pentium II and Pentium III (SEC cartridge)
• Memory: SDRAM DIMM slots (multiple banks visible on board)
• Expansion Slots: 1x AGP, 4x PCI, 2x ISA (visible in photos)
• Storage: Dual IDE (ATA) headers, floppy connector
• Rear I/O: 2x Serial (DB9), 1x Parallel (DB25), 2x PS/2 (keyboard/mouse), USB
• Onboard connectors: ATX power, auxiliary power, chassis/CPU fan headers
• Included: Motherboard only — no CPU, RAM, cables, or I/O shield

Applications

The Intel AL440LX was one of Intel's first chipsets to support the AGP bus, introduced alongside the Pentium II in 1997. It became the foundation for a wide range of desktop workstations and entry-level servers of that era, particularly in corporate desktop deployments and small-business machines. The 440LX supports PC66/PC100 SDRAM and the 1x AGP interface, making it compatible with the first generation of AGP graphics accelerators. Today, boards like this are sought by retro-computing enthusiasts, collectors, and technicians maintaining late-1990s Pentium II/III systems — especially Intel's own branded boards, which were valued for their reliability and close chipset integration. Compatible CPUs include the Pentium II (233–450 MHz) and select early Pentium III processors in Slot 1 packaging.