| Name: | Intel Core 2 Quad Q8400 | 
| Family: | Intel Core2 Quad | 
| Group: | Intel Core 2 Quad Q8000/Q9000 | 
| Segment: | Desktop / Server | 
| Generation: | 2 | 
 
                    | Name: | Intel Core 2 Quad Q8400 | 
| Family: | Intel Core2 Quad | 
| Group: | Intel Core 2 Quad Q8000/Q9000 | 
| Segment: | Desktop / Server | 
| Generation: | 2 | 
| CPU Cores: | 4 | 
| Threads: | 4 | 
| Cores: | 4x | 
| Core architecture: | normal | 
| Hyperthreading: | No | 
| Overclocking: | No | 
| Frequency: | 2.66 GHz | 
| Memory type: | DDR3-1066, DDR2-800 | 
| Max. Memory: | 16.0 GB | 
| Memory channels: | 2 | 
| Bandwidth: | -- | 
| ECC: | No | 
| PCIe: | pci | 
| AES-NI: | No | 
| TDP (PL1 / PBP): | 95 W | 
| TDP (PL2): | None | 
| TDP up: | None | 
| TDP down: | None | 
| Tjunction max: | -- | 
| Technology: | 45 nm | 
| Chip design: | Monolithic | 
| Socket: | LGA 775 | 
| L2-Cache: | 4.0 MB | 
| L3-Cache: | 0 bytes | 
| Architecture: | Yorkfield (Penryn) | 
| Operating systems: | Windows 10, Linux | 
| Virtualization: | VT-x, VT-d | 
| Instruction set (ISA): | x86-64 (64 bit) | 
| ISA extensions: | SSE3, SSE4.1, MMX, SSE2 | 
| Release date: | Q2/2009 | 
| Release price: | -- | 
| Part Number: | -- | 
| Documents: | Technical data sheet | 
 Estimated results for PassMark CPU Mark
    Estimated results for PassMark CPU Mark
|   | AMD Phenom II X2 B57 
                    2C 2T @ 3.2 GHz
                 | 2060 | 
|   | AMD A8-3500M 
                    4C 4T @ 1.5 GHz
                 | 2052 | 
|   | Intel Core 2 Quad Q8400 
                    4C 4T @ 2.66 GHz
                 | 2029 | 
|   | Intel Core i3-2130 
                    2C 4T @ 3.4 GHz
                 | 2020 | 
|   | AMD A6-3500 
                    3C 3T @ 2.1 GHz
                 | 1995 | 
 Geekbench 5, 64bit (Multi-Core)
    Geekbench 5, 64bit (Multi-Core)
|   | AMD Ryzen Embedded R1600 
                    2C 4T @ 2.6 GHz
                 | 1160 | 
|   | AMD A8-3850 
                    4C 4T @ 2.9 GHz
                 | 1159 | 
|   | Intel Core 2 Quad Q8400 
                    4C 4T @ 2.66 GHz
                 | 1155 | 
|   | MediaTek Helio X20 
                    NoneC NoneT @ --
                 | 1153 | 
|   | Intel Core M-5Y10a 
                    2C 4T @ 0.8 GHz
                 | 1151 | 
 CPU-Z Benchmark 17 (Multi-Core)
    CPU-Z Benchmark 17 (Multi-Core)
|   | Intel Core i3-4130 
                    2C 4T @ 3.4 GHz
                 | 921 | 
|   | Intel Core i7-6600U 
                    2C 4T @ 2.6 GHz
                 | 898 | 
|   | Intel Core 2 Quad Q8400 
                    4C 4T @ 2.66 GHz
                 | 894 | 
|   | Intel Core 2 Quad Q9400 
                    4C 4T @ 2.66 GHz
                 | 891 | 
|   | Intel Core 2 Quad Q8300 
                    4C 4T @ 2.5 GHz
                 | 832 | 
 Geekbench 5, 64bit (Single-Core)
    Geekbench 5, 64bit (Single-Core)
|   | Intel Core i3-3217U 
                    2C 4T @ 1.8 GHz
                 | 370 | 
|   | AMD Athlon II X2 240e 
                    2C 2T @ 2.8 GHz
                 | 369 | 
|   | Intel Core 2 Quad Q8400 
                    4C 4T @ 2.66 GHz
                 | 369 | 
|   | AMD Athlon II X2 240e 
                    2C 2T @ 2.8 GHz
                 | 369 | 
|   | AMD A8-3800 
                    4C 4T @ 2.4 GHz
                 | 368 |