Intel Core i5-8400 vs Intel Core i7-6700K Benchmarks, Specs, Performance Comparison and Differences
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Intel Core i5-8400 vs Intel Core i7-6700K
Comparison of the technical characteristics between the processors, with the Intel Core i5-8400 on one side and the Intel Core i7-6700K on the other side. The first is dedicated to the desktop sector, It has 6 cores, 6 threads, a maximum frequency of 4,0GHz. The second is used on the desktop segment, it has a total of 4 cores, 8 threads, its turbo frequency is set to 4,2 GHz. The following table also compares the lithography, the number of transistors (if indicated), the amount of cache memory, the maximum RAM memory capacity, the type of memory accepted, the release date, the maximum number of PCIe lanes, the values obtained in Geekbench 4 and Cinebench R15.
Note: Commissions may be earned from the links above.
This page contains references to products from one or more of our advertisers. We may receive compensation when you click on links to those products. For an explanation of our advertising policy, please visit this page.
Specification comparison:
| Processor | Intel Core i5-8400 | Intel Core i7-6700K | ||||||
| Market (main) | Desktop | Desktop | ||||||
| ISA | x86-64 (64 bit) | x86-64 (64 bit) | ||||||
| Microarchitecture | Coffee Lake | Skylake | ||||||
| Core name | Coffee Lake-S | Skylake-S | ||||||
| Family | Core i5-8000 | Core i7-6000 | ||||||
| Part number(s), S-Spec |
BX80684I58400, |
BX80662I76700K, |
||||||
| Release date | Q4 2017 | Q3 2015 | ||||||
| Lithography | 14 nm++ | 14 nm | ||||||
| Transistors | — | 1. 750.000.000 |
||||||
| Cores | 6 | 4 | ||||||
| Threads | 6 | 8 | ||||||
| Base frequency | 2,8 GHz | 4,0 GHz | ||||||
| Turbo frequency | 4,0 GHz | 4,2 GHz | ||||||
| Bus speed | 8 GT/s | 8 GT/s | ||||||
| Cache memory | 9 MB | 8 MB | ||||||
| Max memory capacity | 64 GB | 64 GB | ||||||
| Memory types |
DDR4-2666 |
DDR4-1866/2133, |
||||||
| Max # of memory channels | 2 | 2 | ||||||
| Max memory bandwidth | 41,6 GB/s | 34,1 GB/s | ||||||
| Max PCIe lanes | 16 | 16 | ||||||
| TDP | 65 W | 91 W | ||||||
| Suggested PSU | 600W ATX Power Supply | 600W ATX Power Supply | ||||||
| GPU integrated graphics | Intel UHD Graphics 630 (Coffee Lake) | Intel HD Graphics 4000 | ||||||
| GPU execution units | 23 | 16 | ||||||
| GPU shading units | 184 | 128 | ||||||
| GPU base clock | 350 MHz | 350 MHz | ||||||
| GPU boost clock | 1050 MHz | 1150 MHz | ||||||
| GPU FP32 floating point | 423,2 GFLOPS | 268,8 GFLOPS | ||||||
| Socket | LGA1151 | LGA1151 | ||||||
| Compatible motherboard | Socket LGA 1151 Motherboard | Socket LGA 1151 Motherboard | ||||||
| Maximum temperature | 100°C | 64°C | ||||||
| CPU-Z single thread | 442 | 498 | ||||||
| CPU-Z multi thread | 2. 666 |
2.556 | ||||||
| Cinebench R15 single thread | 169 | 186 | ||||||
| Cinebench R15 multi-thread | 954 | 946 | ||||||
| Cinebench R23 single thread | 1.017 | 1.125 | ||||||
| Cinebench R23 multi-thread | 5.839 | 5.789 | ||||||
| PassMark single thread | 2.401 | 2.512 | ||||||
| PassMark CPU Mark | 9.206 | 8.942 | ||||||
| (Windows 64-bit) Geekbench 4 single core |
4.765 | 5.240 | ||||||
| (Windows 64-bit) Geekbench 4 multi-core |
18. 154 |
17.298 | ||||||
| (SGEMM) GFLOPS performance |
299,4 GFLOPS | 320,8 GFLOPS | ||||||
| (Multi-core / watt performance) Performance / watt ratio |
279 pts / W | 190 pts / W | ||||||
| Amazon | ||||||||
| eBay |
Note: Commissions may be earned from the links above.
We can better compare what are the technical differences between the two processors.
Suggested PSU: We assume that we have An ATX computer case, a high end graphics card, 16GB RAM, a 512GB SSD, a 1TB HDD hard drive, a Blu-Ray drive. We will have to rely on a more powerful power supply if we want to have several graphics cards, several monitors, more memory, etc.
Price: For technical reasons, we cannot currently display a price less than 24 hours, or a real-time price. This is why we prefer for the moment not to show a price. You should refer to the respective online stores for the latest price, as well as availability.
The processor Intel Core i5-8400 has more cores, the turbo frequency of Intel Core i7-6700K is bigger, that the PDT of Intel Core i5-8400 is lower. The Intel Core i5-8400 was designed earlier.
Performance comparison with the benchmarks:
Performance comparison between the two processors, for this we consider the results generated on benchmark software such as Geekbench 4.
| CPU-Z — Multi-thread & single thread score | |
|---|---|
| Intel Core i5-8400 |
442 2.666 |
| Intel Core i7-6700K |
498 2.556 |
In single core, the difference is -11%.
In multi-core, the differential gap is 4%.
Note: Commissions may be earned from the links above. These scores are only an
average of the performances got with these processors, you may get different results.
CPU-Z is a system information software that provides the name of the processor, its model number, the codename, the cache levels, the package, the process. It can also gives data about the mainboard, the memory. It makes real time measurement, with finally a benchmark for the single thread, as well as for the multi thread.
| Cinebench R15 — Multi-thread & single thread score | |
|---|---|
| Intel Core i5-8400 |
169 954 |
| Intel Core i7-6700K |
186 946 |
In single core, the difference is -9%. In multi-core, the differential gap is 1%.
Note: Commissions may be earned from the links above. These scores are only an
average of the performances got with these processors, you may get different results.
Cinebench R15 evaluates the performance of CPU calculations by restoring a photorealistic 3D scene. The scene has 2,000 objects, 300,000 polygons, uses sharp and fuzzy reflections, bright areas, shadows, procedural shaders, antialiasing, and so on. The faster the rendering of the scene is created, the more powerful the PC is, with a high number of points.
| Cinebench R23 — Multi-thread & single thread score | |
|---|---|
| Intel Core i5-8400 |
1.017 5.839 |
| Intel Core i7-6700K |
1.125 5.789 |
In single core, the difference is -10%. In multi-core, the differential gap is 1%.
Note: Commissions may be earned from the links above. These scores are only an
average of the performances got with these processors, you may get different results.
Cinebench R23 is cross-platform testing software that allows you to assess the hardware capabilities of a device such as a computer, tablet, server. This version of Cinebench takes into account recent developments in processors with multiple cores and the latest improvements in rendering techniques. The evaluation is ultimately even more relevant. The test scene contains no less than 2,000 objects and more than 300,000 polygons in total.
| PassMark — CPU Mark & single thread | |
|---|---|
| Intel Core i5-8400 |
2.401 9.206 |
| Intel Core i7-6700K |
2.512 8.942 |
In single core, the difference is -4%.
In multi-core, the differential gap is 3%.
Note: Commissions may be earned from the links above. These scores are only an
average of the performances got with these processors, you may get different results.
PassMark is a benchmarking software that performs several performance tests including prime numbers, integers, floating point, compression, physics, extended instructions, encoding, sorting. The higher the score is, the higher is the device capacity.
On Windows 64-bit:
| Geekbench 4 — Multi-core & single core score — Windows 64-bit | |
|---|---|
| Intel Core i5-8400 |
4.765 18.154 |
| Intel Core i7-6700K |
5.240 17.298 |
In single core, the difference is -9%. In multi-core, the differential gap is 5%.
On Linux 64-bit:
| Geekbench 4 — Multi-core & single core score — Linux 64-bit | |
|---|---|
| Intel Core i5-8400 |
5.100 18.750 |
| Intel Core i7-6700K |
5.313 15.160 |
In single core, the difference is -4%. In multi-core, the differential gap is 24%.
On Android 64-bit:
| Geekbench 4 — Multi-core & single core score — Android 64-bit | |
|---|---|
| Intel Core i5-8400 |
4.145 14.898 |
| Intel Core i7-6700K |
3.401 7.369 |
In single core, the difference is 22%. In multi-core, the differential gap is 102%.
On Mac OS X 64-bit:
| Geekbench 4 — Multi-core & single core score — Mac OS X 64-bit | |
|---|---|
| Intel Core i5-8400 |
5.  09820.285 |
| Intel Core i7-6700K |
5.277 17.860 |
In single core, the difference is -3%. In multi-core, the differential gap is 14%.
Note: Commissions may be earned from the links above. These scores are only an
average of the performances got with these processors, you may get different results.
Geekbench 4 is a complete benchmark platform with several types of tests, including data compression, images, AES encryption, SQL encoding, HTML, PDF file rendering, matrix computation, Fast Fourier Transform, 3D object simulation, photo editing, memory testing. This allows us to better visualize the respective power of these devices. For each result, we took an average of 250 values on the famous benchmark software.
Equivalence:
Intel Core i5-8400 AMD equivalentIntel Core i7-6700K AMD equivalent
See also:
Intel Core i5-8400HIntel Core i5-8400T
Intel Core i7-6700Intel Core i7-6700HQIntel Core i7-6700T
Intel Core i7-6700K vs Intel Core i5-8400 Benchmarks, Specs, Performance Comparison and Differences
|
|
|
|
|
Intel Core i7-6700K vs Intel Core i5-8400
Comparison of the technical characteristics between the processors, with the Intel Core i7-6700K on one side and the Intel Core i5-8400 on the other side.
The first is dedicated to the desktop sector, It has 4 cores, 8 threads, a maximum frequency of 4,2GHz. The second is used on the desktop segment, it has a total of 6 cores, 6 threads, its turbo frequency is set to 4,0 GHz. The following table also compares the lithography, the number of transistors (if indicated), the amount of cache memory, the maximum RAM memory capacity, the type of memory accepted, the release date, the maximum number of PCIe lanes, the values obtained in Geekbench 4 and Cinebench R15.
Note: Commissions may be earned from the links above.
This page contains references to products from one or more of our advertisers. We may receive compensation when you click on links to those products. For an explanation of our advertising policy, please visit this page.
Specification comparison:
| Processor | Intel Core i7-6700K | Intel Core i5-8400 | ||||||
| Market (main) | Desktop | Desktop | ||||||
| ISA | x86-64 (64 bit) | x86-64 (64 bit) | ||||||
| Microarchitecture | Skylake | Coffee Lake | ||||||
| Core name | Skylake-S | Coffee Lake-S | ||||||
| Family | Core i7-6000 | Core i5-8000 | ||||||
| Part number(s), S-Spec |
BX80662I76700K, |
BX80684I58400, |
||||||
| Release date | Q3 2015 | Q4 2017 | ||||||
| Lithography | 14 nm | 14 nm++ | ||||||
| Transistors | 1. 750.000.000 |
— | ||||||
| Cores | 4 | 6 | ||||||
| Threads | 8 | 6 | ||||||
| Base frequency | 4,0 GHz | 2,8 GHz | ||||||
| Turbo frequency | 4,2 GHz | 4,0 GHz | ||||||
| Bus speed | 8 GT/s | 8 GT/s | ||||||
| Cache memory | 8 MB | 9 MB | ||||||
| Max memory capacity | 64 GB | 64 GB | ||||||
| Memory types |
DDR4-1866/2133, |
DDR4-2666 |
||||||
| Max # of memory channels | 2 | 2 | ||||||
| Max memory bandwidth | 34,1 GB/s | 41,6 GB/s | ||||||
| Max PCIe lanes | 16 | 16 | ||||||
| TDP | 91 W | 65 W | ||||||
| Suggested PSU | 600W ATX Power Supply | 600W ATX Power Supply | ||||||
| GPU integrated graphics | Intel HD Graphics 4000 | Intel UHD Graphics 630 (Coffee Lake) | ||||||
| GPU execution units | 16 | 23 | ||||||
| GPU shading units | 128 | 184 | ||||||
| GPU base clock | 350 MHz | 350 MHz | ||||||
| GPU boost clock | 1150 MHz | 1050 MHz | ||||||
| GPU FP32 floating point | 268,8 GFLOPS | 423,2 GFLOPS | ||||||
| Socket | LGA1151 | LGA1151 | ||||||
| Compatible motherboard | Socket LGA 1151 Motherboard | Socket LGA 1151 Motherboard | ||||||
| Maximum temperature | 64°C | 100°C | ||||||
| CPU-Z single thread | 498 | 442 | ||||||
| CPU-Z multi thread | 2. 556 |
2.666 | ||||||
| Cinebench R15 single thread | 186 | 169 | ||||||
| Cinebench R15 multi-thread | 946 | 954 | ||||||
| Cinebench R23 single thread | 1.125 | 1.017 | ||||||
| Cinebench R23 multi-thread | 5.789 | 5.839 | ||||||
| PassMark single thread | 2.512 | 2.401 | ||||||
| PassMark CPU Mark | 8.942 | 9.206 | ||||||
| (Windows 64-bit) Geekbench 4 single core |
5.240 | 4.765 | ||||||
| (Windows 64-bit) Geekbench 4 multi-core |
17. 298 |
18.154 | ||||||
| (SGEMM) GFLOPS performance |
320,8 GFLOPS | 299,4 GFLOPS | ||||||
| (Multi-core / watt performance) Performance / watt ratio |
190 pts / W | 279 pts / W | ||||||
| Amazon | ||||||||
| eBay |
Note: Commissions may be earned from the links above.
We can better compare what are the technical differences between the two processors.
Suggested PSU: We assume that we have An ATX computer case, a high end graphics card, 16GB RAM, a 512GB SSD, a 1TB HDD hard drive, a Blu-Ray drive. We will have to rely on a more powerful power supply if we want to have several graphics cards, several monitors, more memory, etc.
Price: For technical reasons, we cannot currently display a price less than 24 hours, or a real-time price. This is why we prefer for the moment not to show a price. You should refer to the respective online stores for the latest price, as well as availability.
The processor Intel Core i5-8400 has a larger number of cores, the maximum frequency of Intel Core i7-6700K is greater, that the thermal dissipation power of Intel Core i5-8400 is less. The Intel Core i5-8400 was started more recently.
Performance comparison with the benchmarks:
Performance comparison between the two processors, for this we consider the results generated on benchmark software such as Geekbench 4.
| CPU-Z — Multi-thread & single thread score | |
|---|---|
| Intel Core i5-8400 |
442 2.666 |
| Intel Core i7-6700K |
498 2.  556 |
In single core, the difference is 13%. In multi-core, the difference in terms of gap is 4%.
Note: Commissions may be earned from the links above. These scores are only an
average of the performances got with these processors, you may get different results.
CPU-Z is a system information software that provides the name of the processor, its model number, the codename, the cache levels, the package, the process. It can also gives data about the mainboard, the memory. It makes real time measurement, with finally a benchmark for the single thread, as well as for the multi thread.
| Cinebench R15 — Multi-thread & single thread score | |
|---|---|
| Intel Core i5-8400 |
169 954 |
| Intel Core i7-6700K |
186 946 |
In single core, the difference is 10%.
In multi-core, the difference in terms of gap is 1%.
Note: Commissions may be earned from the links above. These scores are only an
average of the performances got with these processors, you may get different results.
Cinebench R15 evaluates the performance of CPU calculations by restoring a photorealistic 3D scene. The scene has 2,000 objects, 300,000 polygons, uses sharp and fuzzy reflections, bright areas, shadows, procedural shaders, antialiasing, and so on. The faster the rendering of the scene is created, the more powerful the PC is, with a high number of points.
| Cinebench R23 — Multi-thread & single thread score | |
|---|---|
| Intel Core i5-8400 |
1.017 5.839 |
| Intel Core i7-6700K |
1.125 5.789 |
In single core, the difference is 11%.
In multi-core, the difference in terms of gap is 1%.
Note: Commissions may be earned from the links above. These scores are only an
average of the performances got with these processors, you may get different results.
Cinebench R23 is cross-platform testing software that allows you to assess the hardware capabilities of a device such as a computer, tablet, server. This version of Cinebench takes into account recent developments in processors with multiple cores and the latest improvements in rendering techniques. The evaluation is ultimately even more relevant. The test scene contains no less than 2,000 objects and more than 300,000 polygons in total.
| PassMark — CPU Mark & single thread | |
|---|---|
| Intel Core i5-8400 |
2.401 9.206 |
| Intel Core i7-6700K |
2.512 8.  942 |
In single core, the difference is 5%. In multi-core, the difference in terms of gap is 3%.
Note: Commissions may be earned from the links above. These scores are only an
average of the performances got with these processors, you may get different results.
PassMark is a benchmarking software that performs several performance tests including prime numbers, integers, floating point, compression, physics, extended instructions, encoding, sorting. The higher the score is, the higher is the device capacity.
On Windows 64-bit:
| Geekbench 4 — Multi-core & single core score — Windows 64-bit | |
|---|---|
| Intel Core i5-8400 |
4.765 18.154 |
| Intel Core i7-6700K |
5.240 17.298 |
In single core, the difference is 10%.
In multi-core, the difference in terms of gap is 5%.
On Linux 64-bit:
| Geekbench 4 — Multi-core & single core score — Linux 64-bit | |
|---|---|
| Intel Core i5-8400 |
5.100 18.750 |
| Intel Core i7-6700K |
5.313 15.160 |
In single core, the difference is 4%. In multi-core, the difference in terms of gap is 24%.
On Android 64-bit:
| Geekbench 4 — Multi-core & single core score — Android 64-bit | |
|---|---|
| Intel Core i5-8400 |
4.145 14.898 |
| Intel Core i7-6700K |
3.401 7.369 |
In single core, the difference is 22%. In multi-core, the difference in terms of gap is 102%.
On Mac OS X 64-bit:
| Geekbench 4 — Multi-core & single core score — Mac OS X 64-bit | |
|---|---|
| Intel Core i5-8400 |
5.098 20.285 |
| Intel Core i7-6700K |
5.277 17.860 |
In single core, the difference is 4%. In multi-core, the difference in terms of gap is 14%.
Note: Commissions may be earned from the links above. These scores are only an
average of the performances got with these processors, you may get different results.
Geekbench 4 is a complete benchmark platform with several types of tests, including data compression, images, AES encryption, SQL encoding, HTML, PDF file rendering, matrix computation, Fast Fourier Transform, 3D object simulation, photo editing, memory testing. This allows us to better visualize the respective power of these devices.