Intel

Intel - Intel Pentium MMX 166Mhz 2.8v FV80503166 CPU SY059

Name: Intel - Intel Pentium MMX 166Mhz 2.8v FV80503166 CPU SY059
Brand: Intel
SKU: B004574MQC

Bottom line: The Intel - Intel Pentium MMX 166Mhz 2.8v FV80503166 CPU SY059 is a specs-and-price decision rather than a crowd-consensus one in the retro cpus 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 2026-10-20

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 →

Pros & Cons

Pros

✓ Warranty Included

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

SpecPicks Verdict

SpecPicks scored Intel - Intel Pentium MMX 166Mhz 2.8v FV80503166 CPU SY059 using a rating × review-volume × price-fit model applied to published specs and reviews across the retro cpus category. Intel's retro cpus 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 retro cpus 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

Warranty Included

Full Specifications

Brand	Intel
CPU Model	Pentium
CPU Speed	166 MHz
Mfr Part Number	SY059
Processor Brand	Intel
Processor Speed	166 MHz
CPU Manufacturer	Intel
Processor Series	Pentium

Ready to buy?

Intel - Intel Pentium MMX 166Mhz 2.8v FV80503166 CPU SY059 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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