Intel Pentium 4 3.0GHz 800MHz 512KB Socket 478 CPU

Name: Intel Pentium 4 3.0GHz 800MHz 512KB Socket 478 CPU
Brand: Unbranded
SKU: B000YAB6JK
Price: 189.95 USD
Availability: InStock

Bottom line: The Intel Pentium 4 3.0GHz 800MHz 512KB Socket 478 CPU is a specs-and-price decision rather than a crowd-consensus one in the retro motherboards category, priced around $189.95 on Amazon as of 2026-10-06. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.

$189.95

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🛒 See live eBay price Also on Amazon — $189.95 Compare to similar retro motherboards

By Mike Perry, Founder & Editor-in-Chief · Listing data updated 2026-10-06

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. About the author →

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

Pros & Cons

Pros

✓ 800 MHz system bus 512 KB L2 advanced transfer 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

Intel Pentium 4 3.0GHz 800MHz 512KB Socket 478 CPU

SpecPicks Verdict

SpecPicks scored Intel Pentium 4 3.0GHz 800MHz 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 3.0 GHz 800 MHz Socket 478 CPU General Features: 3.0 GHz clock speed 478-pin package
800 MHz system bus 512 KB L2 advanced transfer cache

Full Specifications

Brand	Intel
Platform	Windows 10
CPU Model	Pentium
CPU Speed	3 GHz
CPU Socket	Socket 478
Unit Count	1 Count
Model Number	P43000C478
Mfr Part Number	P43000C478
Processor Brand	Intel
Processor Count	4
Processor Speed	3 GHz
Secondary Cache	0.51 MB
CPU Manufacturer	Intel
Processor Series	Pentium
Processor Socket	Socket 478
Cache Memory Installed Size	0.51 MB

Ready to buy?

Intel Pentium 4 3.0GHz 800MHz 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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*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.