Core 2 Quad Q8400s vs Core i7-6700K
Primary details
Comparing Core i7-6700K and Core 2 Quad Q8400s processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 1130 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 1.13 | no data |
| Market segment | Desktop processor | Desktop processor |
| Series | Intel Core i7 (Desktop) | no data |
| Power efficiency | 5.84 | no data |
| Architecture codename | Skylake (2015−2016) | Yorkfield (2007−2009) |
| Release date | 1 September 2015 (9 years ago) | 19 April 2009 (15 years ago) |
| Launch price (MSRP) | $339 | no data |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Core i7-6700K and Core 2 Quad Q8400s basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.
| Physical cores | 4 (Quad-Core) | 4 (Quad-Core) |
| Threads | 8 | 4 |
| Base clock speed | 4 GHz | 2.66 GHz |
| Boost clock speed | 4.2 GHz | 0.67 GHz |
| Bus type | DMI 3.0 | no data |
| Bus rate | 4 × 8 GT/s | 1333 MHz |
| Multiplier | 40 | no data |
| L1 cache | 256 KB | 64 KB (per core) |
| L2 cache | 1 MB | 4 MB (shared) |
| L3 cache | 8 MB (shared) | 0 KB |
| Chip lithography | 14 nm | 45 nm |
| Die size | 122 mm2 | 2x 82 mm2 |
| Maximum case temperature (TCase) | 64 °C | 76 °C |
| Number of transistors | 1750 Million | 456 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | + | - |
| VID voltage range | no data | 0.85V-1.3625V |
Compatibility
Information on Core i7-6700K and Core 2 Quad Q8400s compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.
| Number of CPUs in a configuration | 1 (Uniprocessor) | 1 |
| Socket | FCLGA1151 | FCLGA775,LGA775 |
| Power consumption (TDP) | 91 Watt | 65 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i7-6700K and Core 2 Quad Q8400s. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 | no data |
| AES-NI | + | - |
| AVX | + | - |
| vPro | + | no data |
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | 2.0 | - |
| Hyper-Threading Technology | + | - |
| TSX | + | - |
| Idle States | + | + |
| Thermal Monitoring | + | + |
| Demand Based Switching | no data | - |
Security technologies
Core i7-6700K and Core 2 Quad Q8400s technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | - |
| EDB | + | + |
| Secure Key | + | no data |
| MPX | + | - |
| Identity Protection | + | - |
| SGX | Yes with Intel® ME | no data |
| OS Guard | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i7-6700K and Core 2 Quad Q8400s are enumerated here.
| AMD-V | + | - |
| VT-d | + | no data |
| VT-x | + | + |
| EPT | + | no data |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i7-6700K and Core 2 Quad Q8400s. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3, DDR4 | DDR1, DDR2, DDR3 |
| Maximum memory size | 64 GB | no data |
| Max memory channels | 2 | no data |
| Maximum memory bandwidth | 34.134 GB/s | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Intel HD Graphics 530 | On certain motherboards (Chipset feature) |
| Max video memory | 64 GB | no data |
| Quick Sync Video | + | - |
| Clear Video | + | no data |
| Clear Video HD | + | no data |
| Graphics max frequency | 1.15 GHz | no data |
| InTru 3D | + | no data |
Graphics interfaces
Available interfaces and connections of Core i7-6700K and Core 2 Quad Q8400s integrated GPUs.
| Number of displays supported | 3 | no data |
| eDP | + | no data |
| DisplayPort | + | - |
| HDMI | + | - |
| DVI | + | no data |
Graphics image quality
Maximum display resolutions supported by Core i7-6700K and Core 2 Quad Q8400s integrated GPUs, including resolutions over different interfaces.
| 4K resolution support | + | no data |
| Max resolution over HDMI 1.4 | 4096x2304@24Hz | no data |
| Max resolution over eDP | 4096x2304@60Hz | no data |
| Max resolution over DisplayPort | 4096x2304@60Hz | no data |
| Max resolution over VGA | N/A | no data |
Graphics API support
APIs supported by Core i7-6700K and Core 2 Quad Q8400s integrated GPUs, sometimes API versions are included.
| DirectX | 12 | no data |
| OpenGL | 4.5 | no data |
Peripherals
Specifications and connection of peripherals supported by Core i7-6700K and Core 2 Quad Q8400s.
| PCIe version | 3.0 | 2.0 |
| PCI Express lanes | 16 | no data |
Pros & cons summary
| Recency | 1 September 2015 | 19 April 2009 |
| Threads | 8 | 4 |
| Chip lithography | 14 nm | 45 nm |
| Power consumption (TDP) | 91 Watt | 65 Watt |
i7-6700K has an age advantage of 6 years, 100% more threads, and a 221.4% more advanced lithography process.
Core 2 Quad Q8400s, on the other hand, has 40% lower power consumption.
We couldn't decide between Core i7-6700K and Core 2 Quad Q8400s. We've got no test results to judge.
Should you still have questions on choice between Core i7-6700K and Core 2 Quad Q8400s, ask them in Comments section, and we shall answer.
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