What are the alternatives to the Intel Core 2 Quad Q9400 Processor 2.66 GHz 1333 MHz 6 MB LGA775 EM64T CPU…?

Intel Core 2 Quad Q9400 Processor 2.66 GHz 1333 MHz 6 MB LGA775 EM64T CPU… competes with other Retro CPUs products on SpecPicks. Use our Compare tool to view specs side-by-side, or browse the full Retro CPUs category for alternatives.

Intel

Intel Core 2 Quad Q9400 Processor 2.66 GHz 1333 MHz 6 MB LGA775 EM64T CPU (BX80580Q9400)

Name: Intel Core 2 Quad Q9400 Processor 2.66 GHz 1333 MHz 6 MB LGA775 EM64T CPU (BX80580Q9400)
Brand: Intel
SKU: B001DO1Q1O
Price: 19.95 USD
Availability: InStock

By Mike Perry, Hardware Editor · Verified 2026-09-20

Mike Perry has researched PC hardware since 2014, tracking 80+ GPU generations, 50+ retro handheld platforms, and 30+ vintage PC configurations. He synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides. View full credentials →

$19.95

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🛒 See live eBay price Also on Amazon — $19.95 Compare to similar retro cpus

*Price sourced from Amazon.com. Last updated 2026-09-20. Price and availability subject to change.

Bottom line: The Intel Core 2 Quad Q9400 Processor 2.66 GHz 1333 MHz 6 MB LGA775 EM64T CPU (BX80580Q9400) is a specs-and-price decision rather than a crowd-consensus one in the retro cpus category, priced around $19.95. Check the specification table above against one or two close alternatives — on price and spec fit, not on star ratings.

Pros & Cons

Pros

✓ LGA775 socket processor contains four cores running at 2.66 GHz
✓ 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

LGA775 socket processor contains four cores running at 2.66 GHz Processor runs on a 1333 MHz front side bus and has 6 MB of L2 cache 45nm architecture provides better performance and energy efficiency

SpecPicks Verdict

SpecPicks scored Intel Core 2 Quad Q9400 Processor 2.66 GHz 1333 MHz 6 MB LGA775… using a rating × review-volume × price-fit model applied to our editorial and benchmark analysis 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 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.

Key Features

LGA775 socket processor contains four cores running at 2.66 GHz
Processor runs on a 1333 MHz front side bus and has 6 MB of L2 cache
45nm architecture provides better performance and energy efficiency
Multimedia acceleration boosts performance in applications such as high-definition video editing and encoding
Intelligent Power Capability turns off portions of the processor when not in use for better energy efficiency

Full Specifications

Brand	Intel
Model	BX80580Q9400
Warranty	3 year
UnitCount	1
Manufacturer	Intel
ItemPartNumber	BX80580Q9400

Ready to buy?

Intel Core 2 Quad Q9400 Processor 2.66 GHz 1333 MHz 6 MB LGA775 EM64T CPU (BX80580Q9400) is sold on the used and vintage market, where eBay carries the live inventory — Amazon does not stock this part. Prices and condition vary by seller and move in real time, so we link the live listing rather than quote a cached price. 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 2026-09-20. Price and availability subject to change.