Intel’s Final Pentium III on Tualatin Core Marks the End of an Era

August 26, 2001 marked a turning point for Intel’s consumer CPUs—both in what the company launched next and in what it quietly signaled it was done supporting for good. While new Pentium 4 models arrived with higher clock speeds, Intel also released what would become the final Pentium III on the Tualatin core, a chip that enthusiasts still remember for balancing speed, efficiency, and thermals better than many expected from a “last hurrah.”

Two Intel launches on the same day

On August 26, 2001, Intel introduced multiple processors at once, targeting different buyer priorities. The company’s Pentium 4 lineup gained momentum with faster Willamette-based options, but the more surprising drop for PC hardware fans came from the Pentium III side.

• Intel released two new Pentium 4 models based on the Willamette core, clocked at 1.9 GHz and 2.0 GHz.
• On the same date, Intel also launched the Pentium III using the Tualatin core.
• The Pentium III Tualatin is described as the last Pentium III before Intel shifted fully toward the Pentium 4.

Why the Pentium III Tualatin mattered

Intel’s Tualatin-based Pentium III was built on a 130-nanometer process and aimed to deliver a stronger real-world experience—running quickly while staying cool and power-efficient. Even though the underlying approach still traces back to earlier design roots from the Pentium Pro era, the Tualatin generation earned a strong reputation among many buyers.

• Manufactured using a 130 nm process.
• Designed to be fast, cool, and power-efficient.
• Often regarded by many as a better alternative to the Pentium 4 of the time.
• Its fundamental design is noted as being largely based on the Pentium Pro architecture from 1995.

Enthusiast nickname: “the King”

Within enthusiast circles, performance branding followed the top-clocked Tualatin Pentium III. The model topping out at 1.4 GHz was specifically nicknamed “the King.”

• The highest-clocked Pentium III Tualatin (1.4 GHz) was referred to by enthusiasts as “the King.”

The longer arc: NetBurst ends, Core 2 returns to older lessons

The immediate sales narrative wasn’t the whole story. Five years after the August 2001 releases, Intel abandoned the Pentium 4’s NetBurst direction—particularly its long-running high-frequency ambition. That earlier goal of reaching 10 GHz never materialized, and the eventual successor architecture is described as returning to principles closer to the Pentium III.

• About five years later, Intel buried the Pentium 4 along with its NetBurst architecture.
• Intel’s target of 10 GHz was described as being missed by a wide margin.
• The follow-up platform, Core 2, is characterized as aligning more closely with the Pentium III approach than with NetBurst.

How history remembered it—less love than you’d expect

Even with the enthusiast reputation and later vindication, the Pentium III Tualatin didn’t dominate retrospective rankings. In a later Intel CPU popularity survey from 2011, the Tualatin-based Pentium III received only a small share of votes compared with the most celebrated Intel chips.

• A 2011 community-style survey on the most legendary Intel CPU drew only limited support for the Pentium III on the Tualatin basis.