Core i5-9400 vs Core i7-8700B
Aggregate performance score
i7-8700B outperforms i5-9400 by a significant 27% based on our aggregate benchmark results.
Primary details
Comparing Core i7-8700B and Core i5-9400 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in performance ranking | 893 | 1029 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 13.12 | 17.90 |
| Market segment | Desktop processor | Desktop processor |
| Series | Intel Core i7 | Intel Core i5 |
| Architecture codename | Coffee Lake (2017−2019) | Coffee Lake (2017−2019) |
| Release date | 2 April 2018 (6 years ago) | 7 January 2019 (5 years ago) |
| Launch price (MSRP) | $303 | $182 |
| Current price | $172 (0.6x MSRP) | $120 (0.7x MSRP) |
Cost-effectiveness evaluation
Performance per price, higher is better.
i5-9400 has 36% better value for money than i7-8700B.
Detailed specifications
Core i7-8700B and Core i5-9400 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 | 6 (Hexa-Core) | 6 (Hexa-Core) |
| Threads | 12 | 6 |
| Base clock speed | 3.2 GHz | 2.9 GHz |
| Boost clock speed | 3.2 GHz | 2.9 GHz |
| Bus support | 4 × 8 GT/s | 4 × 8 GT/s |
| L1 cache | 384 KB | 384 KB |
| L2 cache | 1.5 MB | 1.5 MB |
| L3 cache | 12 MB (shared) | 9 MB (shared) |
| Chip lithography | 14 nm | 14 nm |
| Die size | 149 mm2 | 149 mm2 |
| Maximum core temperature | no data | 100 °C |
| Maximum case temperature (TCase) | 72 °C | 72 °C |
| 64 bit support | + | + |
| Windows 11 compatibility | + | + |
| Unlocked multiplier | No | No |
Compatibility
Information on Core i7-8700B and Core i5-9400 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 (Uniprocessor) |
| Socket | Intel BGA 1440 | 1151 |
| Power consumption (TDP) | 65 Watt | 65 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i7-8700B and Core i5-9400. You'll probably need this information if you require some particular technology.
| AES-NI | + | + |
| AVX | + | + |
| vPro | + | no data |
| Enhanced SpeedStep (EIST) | + | + |
| TSX | + | no data |
| SIPP | + | no data |
Security technologies
Core i7-8700B and Core i5-9400 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i7-8700B and Core i5-9400 are enumerated here.
| VT-d | + | + |
| VT-x | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i7-8700B and Core i5-9400. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4-2666 | DDR4 Dual-channel |
| Maximum memory size | 64 GB | 64 GB |
| Max memory channels | 2 | 2 |
| Maximum memory bandwidth | 42.671 GB/s | 42.671 GB/s |
| ECC memory support | - | - |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Intel UHD Graphics 630 | Intel UHD Graphics 630 |
Peripherals
Specifications and connection of peripherals supported by Core i7-8700B and Core i5-9400.
| PCIe version | 3.0 | 3.0 |
| PCI Express lanes | 16 | 16 |
Synthetic benchmark performance
Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.
Combined synthetic benchmark score
This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.
Core i7-8700B outperforms Core i5-9400 by 27% based on our aggregate benchmark results.
Passmark
Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.
Benchmark coverage: 68%
Core i7-8700B outperforms Core i5-9400 by 27% in Passmark.
GeekBench 5 Single-Core
GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.
Benchmark coverage: 42%
Core i7-8700B outperforms Core i5-9400 by 11% in GeekBench 5 Single-Core.
GeekBench 5 Multi-Core
GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.
Benchmark coverage: 42%
Core i7-8700B outperforms Core i5-9400 by 22% in GeekBench 5 Multi-Core.
Pros & cons summary
| Performance score | 7.72 | 6.06 |
| Recency | 2 April 2018 | 7 January 2019 |
| Threads | 12 | 6 |
| Cost | $303 | $182 |
i7-8700B has a 27.4% higher aggregate performance score, and 100% more threads.
i5-9400, on the other hand, has an age advantage of 9 months, and its recommended price lower by $121.
The Core i7-8700B is our recommended choice as it beats the Core i5-9400 in performance tests.
Should you still have questions on choice between Core i7-8700B and Core i5-9400, ask them in Comments section, and we shall answer.
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