Intel
Pentium P166 A80503166 166MHz CPU Processor with MMX - Tested & Working 21
*Price sourced from Amazon.com. Last updated 2026-05-26. Price and availability subject to change.
Bottom line: The Pentium P166 A80503166 166MHz CPU Processor with MMX - Tested & Working 21 is a niche pick — read recent reviews before buying in the retro cpus category. Read recent reviews carefully before committing.
Cleaned, tested, and heat sealed into an airtight, anti-static pouch. The pins are protected by an anti-static foam square. I've been putting systems like this together since the 90's and work to preserve known good parts like this one.
SpecPicks Verdict
SpecPicks classifies Intel Pentium P166 A80503166 166MHz CPU Processor with MMX - Tested… as a niche pick — read recent reviews before buying in the retro cpus category, based on limited Amazon review volume so far and our ranking model that weights rating × review-volume × price-fit. Intel's positioning sits within the broader category mid-tier. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.
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 Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.
Pros & Cons
Pros
- ✓ Backed by Intel's warranty and support channels
- ✓ Ships via Amazon with Prime eligibility and the standard returns policy
Cons
- ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
- ✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified
Full Specifications
| mmx | true |
|---|---|
| core_count | 1 |
| process_nm | 350 |
| clock_speed_mhz | 166 |
Ready to buy?
Intel Pentium P166 A80503166 166MHz CPU Processor with MMX - Tested & Working 21 is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-05-26. Price and availability subject to change.
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