Note:() - ( ) () - ( ) 2 Quad Q9400 specificationsThe specs can be for short-term listings on auction and classifieds sites General informationTypeCPU / MicroprocessorMarket segmentDesktopFamily 2 QuadModel number?Q9400CPU part numbersAT80580PJ0676Mis an OEM/tray microprocessorBX80580Q9400is a boxed processor with fan and heatsink (English version)BXC80580Q9400is a boxed processor with fan and heatsink (Chinese version)Frequency?2667 MHzBus speed?1333 MHzClock multiplier?8 Package775-land Flip-Chip Land Grid Array (FC-LGA8)1.48" x 1.48" (3.75 cm x 3.75 cm)SocketSocket 775Introduction dateAug 10, 2008Price at introduction$266S-spec numbersPart numberES/QS processorsProduction processorsQHHUSLB6BAT80580PJ0676M+ + BX80580Q9400+ BXC80580Q9400+ Architecture / MicroarchitectureMicroarchitectureProcessor ?Yorkfield stepping?R0 (QHHU, SLB6B)CPUID1067A (QHHU, SLB6B)Manufacturing process0.045 micron456 million transistorsDie164mm2Data width64 bitThe number of CPU cores4 The number of threads4 Floating Point UnitIntegratedLevel 1 cache size?4 x 32 KB 8-way set associative instruction caches4 x 32 KB 8-way set associative data cachesLevel 2 cache size?2 x 3 MB 12-way set associative caches (each L2 cache is shared between 2 cores)MultiprocessingUniprocessorFeaturesMMX instructionsSSE / Streaming SIMD ExtensionsSSE2 / Streaming SIMD Extensions 2SSE3 / Streaming SIMD Extensions 3SSSE3 / Supplemental Streaming SIMD Extensions 3EM64T / Extended Memory 64 technology / 64?NX / XD / Execute disable bit?SSE4.1 / Streaming SIMD Extensions 4.1?VT-x / Virtualization