Intel Core 2 Quad Q9400S

The Intel Core 2 Quad Q9400S packs 4 cores and 8 threads. It drops into the LGA775 socket with a 65W TDP — about 16.3W per core. Clocks run from 2.66GHz base to 2.66GHz boost. Match the socket to your motherboard first; cooler TDP rating second.

PlanMyPC's builder flags compatibility problems automatically and tracks the latest processor deals from multiple stores. Intel backs the product through its standard warranty channels; check the listing for region-specific terms. Every published spec is tabulated below, and compatibility against your current part list is checked automatically. The category page surfaces comparable models near the same price, which makes shortlisting against this processor straightforward.