Core i7-9700KF vs Core 2 Quad Q8400s
Primary details
Comparing Core 2 Quad Q8400s and Core i7-9700KF processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | not rated | 832 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 8.24 |
| Market segment | Desktop processor | Desktop processor |
| Series | no data | Intel Core i7 |
| Power efficiency | no data | 8.95 |
| Architecture codename | Yorkfield (2007−2009) | Coffee Lake (2017−2019) |
| Release date | 19 April 2009 (15 years ago) | 8 January 2019 (5 years ago) |
| Launch price (MSRP) | no data | $374 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Core 2 Quad Q8400s and Core i7-9700KF 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) | 8 (Octa-Core) |
| Threads | 4 | 8 |
| Base clock speed | 2.66 GHz | 3.6 GHz |
| Boost clock speed | 0.67 GHz | 4.9 GHz |
| Bus type | no data | DMI 3.0 |
| Bus rate | 1333 MHz | 4 × 8 GT/s |
| Multiplier | no data | 36 |
| L1 cache | 64 KB (per core) | 64K (per core) |
| L2 cache | 4 MB (shared) | 256K (per core) |
| L3 cache | 0 KB | 12 MB (shared) |
| Chip lithography | 45 nm | 14 nm |
| Die size | 2x 82 mm2 | no data |
| Maximum core temperature | no data | 100 °C |
| Maximum case temperature (TCase) | 76 °C | 72 °C |
| Number of transistors | 456 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | + |
| Unlocked multiplier | - | + |
| VID voltage range | 0.85V-1.3625V | no data |
Compatibility
Information on Core 2 Quad Q8400s and Core i7-9700KF 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 | 1 (Uniprocessor) |
| Socket | FCLGA775,LGA775 | FCLGA1151 |
| Power consumption (TDP) | 65 Watt | 95 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core 2 Quad Q8400s and Core i7-9700KF. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 |
| AES-NI | - | + |
| AVX | - | + |
| vPro | no data | + |
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | - | 2.0 |
| Hyper-Threading Technology | - | - |
| TSX | - | + |
| Idle States | + | + |
| Thermal Monitoring | + | + |
| SIPP | - | + |
| Demand Based Switching | - | no data |
| Status | Discontinued | Discontinued |
Security technologies
Core 2 Quad Q8400s and Core i7-9700KF technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | + |
| EDB | + | + |
| Secure Key | no data | + |
| MPX | - | + |
| Identity Protection | - | + |
| SGX | no data | Yes with Intel® ME |
| OS Guard | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Core 2 Quad Q8400s and Core i7-9700KF are enumerated here.
| VT-d | no data | + |
| VT-x | + | + |
| EPT | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core 2 Quad Q8400s and Core i7-9700KF. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR1, DDR2, DDR3 | DDR4-2666 |
| Maximum memory size | no data | 128 GB |
| Max memory channels | no data | 2 |
| Maximum memory bandwidth | no data | 42.671 GB/s |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | On certain motherboards (Chipset feature) | no data |
Peripherals
Specifications and connection of peripherals supported by Core 2 Quad Q8400s and Core i7-9700KF.
| PCIe version | 2.0 | 3.0 |
| PCI Express lanes | no data | 16 |
Pros & cons summary
| Recency | 19 April 2009 | 8 January 2019 |
| Physical cores | 4 | 8 |
| Threads | 4 | 8 |
| Chip lithography | 45 nm | 14 nm |
| Power consumption (TDP) | 65 Watt | 95 Watt |
Core 2 Quad Q8400s has 46.2% lower power consumption.
i7-9700KF, on the other hand, has an age advantage of 9 years, 100% more physical cores and 100% more threads, and a 221.4% more advanced lithography process.
We couldn't decide between Core 2 Quad Q8400s and Core i7-9700KF. We've got no test results to judge.
Should you still have questions on choice between Core 2 Quad Q8400s and Core i7-9700KF, ask them in Comments section, and we shall answer.
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