Product Overview
| Type | CPU / Microprocessor |
| Market segment | Desktop |
| Family | Intel Core 2 Quad |
| Model number | Q9400 |
| CPU part numbers | AT80580PJ0676M is an OEM/tray CPU |
| BX80580Q9400 / BXC80580Q9400 is a boxed CPU | |
| Spec Code | SLB6B |
| Frequency | 2667 MHz |
| Bus speed | 1333 MHz |
| Package | 775-land Flip-Chip Land Grid Array (FC-LGA8) |
| Socket | Socket 775 / LGA775 / T |
| Microarchitecture | Core |
| Processor core | Yorkfield |
| Data width | 64 bit |
| The number of cores | 4 |
| The number of threads | 4 |
| Level 1 cache size | 4 x 32 KB |
| Level 2 cache size | 2 x 3 MB |