Intel Core i5-8400H vs Intel Core i7-6700K

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CPU comparison with benchmarks


Intel Core i5-8400H CPU1 vs CPU2 Intel Core i7-6700K
Intel Core i5-8400H Intel Core i7-6700K

CPU comparison

Intel Core i5-8400H or Intel Core i7-6700K - which processor is faster? In this comparison we look at the differences and analyze which of these two CPUs is better. We compare the technical data and benchmark results.

The Intel Core i5-8400H has 4 cores with 8 threads and clocks with a maximum frequency of 4.20 GHz. Up to 64 GB of memory is supported in 2 memory channels. The Intel Core i5-8400H was released in Q2/2018.

The Intel Core i7-6700K has 4 cores with 8 threads and clocks with a maximum frequency of 4.20 GHz. The CPU supports up to 64 GB of memory in 2 memory channels. The Intel Core i7-6700K was released in Q3/2015.
Intel Core i5 (336) Family Intel Core i7 (300)
Intel Core i 8000H (6) CPU group Intel Core i 6000 (24)
8 Generation 6
Coffee Lake H Architecture Skylake S
Notebook Segment Desktop
-- Predecessor Intel Core i7-4770K
Intel Core i5-9400H Successor Intel Core i7-7700K

CPU Cores and Base Frequency

The Intel Core i5-8400H is a 4 core processor with a clock frequency of 2.50 GHz (4.20 GHz). The Intel Core i7-6700K has 4 CPU cores with a clock frequency of 4.00 GHz (4.20 GHz).

Intel Core i5-8400H Characteristic Intel Core i7-6700K
4 Cores 4
8 Threads 8
normal Core architecture normal
Yes Hyperthreading Yes
No Overclocking ? Yes
2.50 GHz Frequency 4.00 GHz
4.20 GHz Turbo Frequency (1 Core) 4.20 GHz
3.70 GHz Turbo Frequency (All Cores) 4.00 GHz

NPU AI performance

The performance values of the processor's AI unit. The isolated NPU performance is specified here, the total AI performance (NPU+CPU+iGPU) can be higher. Processors with support for artificial intelligence (AI) and machine learning (ML) can process many calculations, especially audio, image and video processing, much faster than classic processors.

Intel Core i5-8400H Characteristic Intel Core i7-6700K
-- AI hardware --
-- AI specifications --
-- NPU + CPU + iGPU --

Integrated graphics (iGPU)

The integrated graphics unit of a processor is not only responsible for the pure image output on the system, but can also significantly increase the efficiency of the system with the support of modern video codecs.

Intel HD Graphics 630 GPU Intel HD Graphics 530
0.30 GHz GPU frequency 0.35 GHz
1.10 GHz GPU (Turbo) 1.15 GHz
9.5 GPU Generation 9
14 nm Technology 14 nm
3 Max. displays 3
24 Compute units 24
192 Shader 192
No Hardware Raytracing No
No Frame Generation No
64 GB Max. GPU Memory 32 GB
12 DirectX Version 12

Hardware codec support

A photo or video codec that is accelerated in hardware can greatly accelerate the working speed of a processor and extend the battery life of notebooks or smartphones when playing videos.

Intel HD Graphics 630 GPU Intel HD Graphics 530
Decode / Encode Codec h265 / HEVC (8 bit) Decode / Encode
Decode / Encode Codec h265 / HEVC (10 bit) Decode
Decode / Encode Codec h264 Decode / Encode
Decode / Encode Codec VP9 Decode
Decode / Encode Codec VP8 Decode / Encode
No Codec AV1 No
Decode / Encode Codec AVC Decode / Encode
Decode Codec VC-1 Decode
Decode / Encode Codec JPEG Decode / Encode

Memory & PCIe

The Intel Core i5-8400H supports a maximum of 64 GB of memory in 2 memory channels. The Intel Core i7-6700K can connect up to 64 GB of memory in 2 memory channels.

Intel Core i5-8400H Characteristic Intel Core i7-6700K
DDR4-2666 Memory DDR4-2133, DDR3-1866
64 GB Max. Memory 64 GB
2 (Dual Channel) Memory channels 2 (Dual Channel)
42.7 GB/s Max. Bandwidth 34.1 GB/s
No ECC No
-- L2 Cache --
8.00 MB L3 Cache 8.00 MB
3.0 PCIe version 3.0
16 PCIe lanes 16
15.8 GB/s PCIe Bandwidth 15.8 GB/s

Thermal Management

The TDP (Thermal Design Power) of a processor specifies the required cooling solution. The Intel Core i5-8400H has a TDP of 45 W, that of the Intel Core i7-6700K is 91 W.

Intel Core i5-8400H Characteristic Intel Core i7-6700K
45 W TDP (PL1 / PBP) 91 W
-- TDP (PL2) --
-- TDP up --
-- TDP down --
-- Tjunction max. --

Technical details

The Intel Core i5-8400H has a 8.00 MB cache, while the Intel Core i7-6700K cache has a total of 8.00 MB.

Intel Core i5-8400H Characteristic Intel Core i7-6700K
14 nm Technology 14 nm
Monolithic Chip design Monolithic
x86-64 (64 bit) Instruction set (ISA) x86-64 (64 bit)
SSE4.1, SSE4.2, AVX2 ISA extensions SSE4.1, SSE4.2, AVX2
BGA 1440 Socket LGA 1151
VT-x, VT-x EPT, VT-d Virtualization VT-x, VT-x EPT, VT-d
Yes AES-NI Yes
Windows 10, Windows 11, Linux Operating systems Windows 10, Linux
Q2/2018 Release date Q3/2015
-- Release price 420 $
show more data show more data


Rate these processors

Here you can rate the Intel Core i5-8400H to help other visitors make their purchasing decisions. The average rating is 4.0 stars (1 ratings). Rate now:
Here you can rate the Intel Core i7-6700K to help other visitors make their purchasing decisions. The average rating is 4.3 stars (42 ratings). Rate now:

Average performance in benchmarks

Single core performance in 3 CPU benchmarks
Intel Core i5-8400H (96%)
Intel Core i7-6700K (100%)
Multi core performance in 4 CPU benchmarks
Intel Core i5-8400H (85%)
Intel Core i7-6700K (100%)

Geekbench 6 (Single-Core)

Geekbench 6 is a partial load benchmark for modern computers, notebooks and smartphones. In the single-core test, only the fastest CPU core is measured. The test run simulates the performance in practice.
Intel Core i5-8400H Intel Core i5-8400H
4C 8T @ 4.20 GHz
1296 (96%)
Intel Core i7-6700K Intel Core i7-6700K
4C 8T @ 4.20 GHz
1347 (100%)

Geekbench 6 (Multi-Core)

The practical Geekbench 6 multi-core benchmark tests the system's performance under partial load. The processor's maximum power consumption is far from being used up.
Intel Core i5-8400H Intel Core i5-8400H
4C 8T @ 3.70 GHz
3826 (82%)
Intel Core i7-6700K Intel Core i7-6700K
4C 8T @ 4.00 GHz
4665 (100%)

Geekbench 5, 64bit (Single-Core)

Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
Intel Core i5-8400H Intel Core i5-8400H
4C 8T @ 4.20 GHz
1081 (94%)
Intel Core i7-6700K Intel Core i7-6700K
4C 8T @ 4.20 GHz
1151 (100%)

Geekbench 5, 64bit (Multi-Core)

Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
Intel Core i5-8400H Intel Core i5-8400H
4C 8T @ 3.70 GHz
3534 (79%)
Intel Core i7-6700K Intel Core i7-6700K
4C 8T @ 4.00 GHz
4459 (100%)

iGPU - FP32 Performance (Single-precision GFLOPS)

The theoretical computing performance of the internal graphics unit of the processor with simple accuracy (32 bit) in GFLOPS. GFLOPS indicates how many billion floating point operations the iGPU can perform per second.
Intel Core i5-8400H Intel Core i5-8400H
Intel HD Graphics 630 @ 1.10 GHz
422 (96%)
Intel Core i7-6700K Intel Core i7-6700K
Intel HD Graphics 530 @ 1.15 GHz
442 (100%)

Estimated results for PassMark CPU Mark

Some of the CPUs listed below have been benchmarked by CPU-monkey. However the majority of CPUs have not been tested and the results have been estimated by a CPU-monkey’s secret proprietary formula. As such they do not accurately reflect the actual Passmark CPU mark values and are not endorsed by PassMark Software Pty Ltd.
Intel Core i5-8400H Intel Core i5-8400H
4C 8T @ 3.70 GHz
7902 (88%)
Intel Core i7-6700K Intel Core i7-6700K
4C 8T @ 4.00 GHz
8955 (100%)

Cinebench R15 (Single-Core)

Cinebench R15 is the successor of Cinebench 11.5 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
Intel Core i5-8400H Intel Core i5-8400H
4C 8T @ 4.20 GHz
178 (99%)
Intel Core i7-6700K Intel Core i7-6700K
4C 8T @ 4.20 GHz
180 (100%)

Cinebench R15 (Multi-Core)

Cinebench R15 is the successor of Cinebench 11.5 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
Intel Core i5-8400H Intel Core i5-8400H
4C 8T @ 3.70 GHz
819 (92%)
Intel Core i7-6700K Intel Core i7-6700K
4C 8T @ 4.00 GHz
888 (100%)

Cinebench R23 (Single-Core)

Cinebench R23 is the successor of Cinebench R20 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
Intel Core i5-8400H Intel Core i5-8400H
4C 8T @ 4.20 GHz
0 (0%)
Intel Core i7-6700K Intel Core i7-6700K
4C 8T @ 4.20 GHz
1124 (100%)

Cinebench R23 (Multi-Core)

Cinebench R23 is the successor of Cinebench R20 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
Intel Core i5-8400H Intel Core i5-8400H
4C 8T @ 3.70 GHz
0 (0%)
Intel Core i7-6700K Intel Core i7-6700K
4C 8T @ 4.00 GHz
5640 (100%)

Cinebench R20 (Single-Core)

Cinebench R20 is the successor of Cinebench R15 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
Intel Core i5-8400H Intel Core i5-8400H
4C 8T @ 4.20 GHz
0 (0%)
Intel Core i7-6700K Intel Core i7-6700K
4C 8T @ 4.20 GHz
421 (100%)

Cinebench R20 (Multi-Core)

Cinebench R20 is the successor of Cinebench R15 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
Intel Core i5-8400H Intel Core i5-8400H
4C 8T @ 3.70 GHz
0 (0%)
Intel Core i7-6700K Intel Core i7-6700K
4C 8T @ 4.00 GHz
2059 (100%)

Blender 3.1 Benchmark

In the Blender Benchmark 3.1, the scenes "monster", "junkshop" and "classroom" are rendered and the time required by the system is measured. In our benchmark we test the CPU and not the graphics card. Blender 3.1 was presented as a standalone version in March 2022.
Intel Core i5-8400H Intel Core i5-8400H
4C 8T @ 3.70 GHz
0 (0%)
Intel Core i7-6700K Intel Core i7-6700K
4C 8T @ 4.00 GHz
82 (100%)

Blender 2.81 (bmw27)

Blender is a free 3D graphics software for rendering (creating) 3D bodies, which can also be textured and animated in the software. The Blender benchmark creates predefined scenes and measures the time (s) required for the entire scene. The shorter the time required, the better. We selected bmw27 as the benchmark scene.
Intel Core i5-8400H Intel Core i5-8400H
4C 8T @ 3.70 GHz
0 (0%)
Intel Core i7-6700K Intel Core i7-6700K
4C 8T @ 4.00 GHz
369.3 (100%)

CPU-Z Benchmark 17 (Single-Core)

The CPU-Z benchmark measures a processor's performance by measuring the time it takes the system to complete all benchmark calculations. The faster the benchmark is completed, the higher the score.
Intel Core i5-8400H Intel Core i5-8400H
4C 8T @ 4.20 GHz
0 (0%)
Intel Core i7-6700K Intel Core i7-6700K
4C 8T @ 4.20 GHz
464 (100%)

CPU-Z Benchmark 17 (Multi-Core)

The CPU-Z benchmark measures a processor's performance by measuring the time it takes the system to complete all benchmark calculations. The faster the benchmark is completed, the higher the score.
Intel Core i5-8400H Intel Core i5-8400H
4C 8T @ 2.50 GHz
0 (0%)
Intel Core i7-6700K Intel Core i7-6700K
4C 8T @ 4.00 GHz
2313 (100%)

Devices using this processor

Intel Core i5-8400H Intel Core i7-6700K
Unknown Unknown

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