Intel

Intel Pentium 4 Processor 2.00 GHz / 512 / 400 SL66R

Name: Intel Pentium 4 Processor 2.00 GHz / 512 / 400 SL66R
Brand: Intel
SKU: B001156Y4Y

Bottom line: The Intel Pentium 4 Processor 2.00 GHz / 512 / 400 SL66R is a specs-and-price decision rather than a crowd-consensus one in the processors 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 Mike Perry, Founder & Editor-in-Chief · Listing data updated 2026-10-06

Mike Perry — Hardware researcher since 2014, focused on GPU performance across gaming, rendering, and local-LLM inference. Synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides. About the author →

Pros & Cons

Pros

✓ Clock Speed: 2.0 GHz

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

Clock Speed: 2.0 GHz FSB Speed: 400 MHz L2 Cache: 512 KB

SpecPicks Verdict

SpecPicks scored Intel Pentium 4 Processor 2.00 GHz / 512 / 400 SL66R using a rating × review-volume × price-fit model applied to published specs and reviews across the processors category. Intel's processors lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. 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 processors 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

Clock Speed: 2.0 GHz
FSB Speed: 400 MHz
L2 Cache: 512 KB
Sockets Supported: PPGA478
Bus/Core Ratio: 20

Full Specifications

Brand	Intel
Model	SL66R
UnitCount	1
Manufacturer	Intel
ItemPartNumber	SL66R

Ready to buy?

Intel Pentium 4 Processor 2.00 GHz / 512 / 400 SL66R 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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