AB-PI4 © 199? Abit
In a market dominated by third-party chipsets (SiS, UMC, ALi, OPTi), Abit released the AB-PI4 to cater to users who insisted on Intel-only logic. It was built around the Intel 420EX (Aries) chipset. The Aries chipset was Intel's first mainstream attempt to bring the PCI bus to the 486 platform, and it is widely regarded as one of the most stable, albeit conservative, chipsets of the time.
Chipset: Intel 82420EX (Aries).
CPU Support: Socket 3. Supports the full range of 486 processors.
Expansion: 3x PCI slots / 4x ISA slots.
Memory: 4x 72-pin SIMM sockets (usually limited to 64MB or 128MB).
Form Factor: Baby AT.
Cache: 256KB of L2 cache (usually soldered or in DIP sockets).
Intel Logic: Unlike the "chipset wars" between SiS, UMC, and ALi, the Intel Aries chipset focused on bulletproof PCI-to-ISA bus management. If you had a mission-critical application (like a BBS server or a workstation) that couldn't afford a single system crash, the AB-PI4 was the board you bought.
Abit's Quality Control: Because Intel chipsets were more expensive, Abit generally paired them with their highest-quality capacitors and voltage regulators. Consequently, these boards have a much higher survival rate today compared to the more "thrashed" PM4 or PV4 boards.