Intel Core 2 Quad Q8400

The Intel Core 2 Quad Q8400 packs 4 cores and 8 threads. Clocks span 2.66GHz base to 2.66GHz boost. It drops into the LGA775 socket with a 95W TDP — about 23.8W per core. Match the socket to your motherboard first; cooler TDP rating second. Its $129.95 price tag places it squarely in budget territory.

PlanMyPC's builder flags compatibility problems automatically and tracks the latest processor deals from multiple stores. Support and warranty service run through Intel, with terms that vary by region. Every published spec is tabulated below, and compatibility against your current part list is checked automatically. If this processor is not quite the right fit, the category page lists close alternatives at similar prices for a quick side-by-side comparison.