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Intel Pentium 4 2.66GHz 533MHz 512KB Socket 478 CPU

Intel Pentium 4 2.66GHz 533MHz 512KB Socket 478 CPU

Bottom line: The Intel Pentium 4 2.66GHz 533MHz 512KB Socket 478 CPU is a specs-and-price decision rather than a crowd-consensus one in the retro motherboards category. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.

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By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

Pros & Cons

Pros

  • ✓ 533 MHz system bus 512 KB L2 cache

Cons

  • ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
  • ✗ Used and vintage listings vary by seller and condition — check the listing photos, description and return terms before buying

Manufacturer description

You can definitely improve your PC's performance with a faster CPU!! This Intel Pentium 4 CPU runs at 2.66 GHz, has a 533 MHz bus speed and 512 KB cache!! Get this Socket 478 CPU today!!

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SpecPicks Verdict

SpecPicks scored Intel Pentium 4 2.66GHz 533MHz 512KB Socket 478 CPU using a rating × review-volume × price-fit model applied to published specs and reviews across the retro motherboards category. Compare with similarly-priced alternatives in the retro motherboards category before committing. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for retro motherboards of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

  • Intel Pentium 4 2.66 GHz Socket 478 CPU General Features: 2.66 GHz clock speed FC-PGA2 478-pin packa
  • 533 MHz system bus 512 KB L2 cache

Full Specifications

BrandIntel
CPU ModelPentium
CPU Speed2.66 GHz
CPU SocketSocket 478
Model NumberRK80532PE067512
Mfr Part NumberRK80532PE067512
Processor BrandIntel
Processor Count1
Processor Speed2.66 GHz
Secondary Cache0.51 MB
CPU ManufacturerIntel
Processor SeriesPentium
Processor SocketSocket 478

Ready to buy?

Intel Pentium 4 2.66GHz 533MHz 512KB Socket 478 CPU is vintage hardware; the used and vintage market on eBay carries most of the live inventory. Prices and condition vary by seller and move in real time, so we link the live listing rather than quote a cached price. It also has an Amazon listing — check it for current price and availability. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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Intel Pentium 4 2.66GHz 533MHz 512KB Socket 478 CPU
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