Intel Core i5-8600K vs Intel Core i5-9400F

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CPU comparison with benchmarks


Intel Core i5-8600K CPU1 vs CPU2 Intel Core i5-9400F
Intel Core i5-8600K Intel Core i5-9400F

CPU comparison

Intel Core i5-8600K or Intel Core i5-9400F - 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 i5-8600K has 6 cores with 6 threads and clocks with a maximum frequency of 4.30 GHz. Up to 128 GB of memory is supported in 2 memory channels. The Intel Core i5-8600K was released in Q4/2017.

The Intel Core i5-9400F has 6 cores with 6 threads and clocks with a maximum frequency of 4.10 GHz. The CPU supports up to 128 GB of memory in 2 memory channels. The Intel Core i5-9400F was released in Q1/2019.
Intel Core i5 (328) Family Intel Core i5 (328)
Intel Core i 8000 (20) CPU group Intel Core i 9000 (34)
8 Generation 9
Coffee Lake S Architecture Coffee Lake S Refresh
Desktop / Server Segment Desktop / Server
Intel Core i5-7600K Predecessor --
Intel Core i5-9600K Successor Intel Core i5-10400F

CPU Cores and Base Frequency

The Intel Core i5-8600K is a 6 core processor with a clock frequency of 3.60 GHz (4.30 GHz). The Intel Core i5-9400F has 6 CPU cores with a clock frequency of 2.90 GHz (4.10 GHz).

Intel Core i5-8600K Characteristic Intel Core i5-9400F
6 Cores 6
6 Threads 6
normal Core architecture normal
No Hyperthreading No
Yes Overclocking ? No
3.60 GHz Frequency 2.90 GHz
4.30 GHz Turbo Frequency (1 Core) 4.10 GHz
4.10 GHz Turbo Frequency (All Cores) 3.90 GHz

Artificial Intelligence and Machine Learning

Processors with the support of artificial intelligence (AI) and machine learning (ML) can process many calculations, especially audio, image and video processing, much faster than classic processors. Algorithms for ML improve their performance the more data they have collected via software. ML tasks can be processed up to 10,000 times faster than with a classic processor.

Intel Core i5-8600K Characteristic Intel Core i5-9400F
-- AI hardware --
-- AI specifications --

Internal Graphics

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 UHD Graphics 630 GPU no iGPU
0.35 GHz GPU frequency --
1.15 GHz GPU (Turbo) --
9.5 GPU Generation --
14 nm Technology
3 Max. displays
24 Compute units --
192 Shader --
No Hardware Raytracing No
No Frame Generation No
64 GB Max. GPU Memory --
12 DirectX Version --

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

Memory & PCIe

The Intel Core i5-8600K supports a maximum of 128 GB of memory in 2 memory channels. The Intel Core i5-9400F can connect up to 128 GB of memory in 2 memory channels.

Intel Core i5-8600K Characteristic Intel Core i5-9400F
DDR4-2666 Memory DDR4-2666
128 GB Max. Memory 128 GB
2 (Dual Channel) Memory channels 2 (Dual Channel)
42.7 GB/s Max. Bandwidth 42.7 GB/s
No ECC No
-- L2 Cache --
9.00 MB L3 Cache 9.00 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 i5-8600K has a TDP of 95 W, that of the Intel Core i5-9400F is 65 W.

Intel Core i5-8600K Characteristic Intel Core i5-9400F
95 W TDP (PL1 / PBP) 65 W
-- TDP (PL2) --
-- TDP up --
-- TDP down --
-- Tjunction max. 100 °C

Technical details

The Intel Core i5-8600K has a 9.00 MB cache, while the Intel Core i5-9400F cache has a total of 9.00 MB.

Intel Core i5-8600K Characteristic Intel Core i5-9400F
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
LGA 1151-2 Socket LGA 1151-2
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, Windows 11, Linux
Q4/2017 Release date Q1/2019
295 $ Release price 157 $
show more data show more data


Rate these processors

Here you can rate the Intel Core i5-8600K to help other visitors make their purchasing decisions. The average rating is 4.5 stars (2 ratings). Rate now:
Here you can rate the Intel Core i5-9400F to help other visitors make their purchasing decisions. The average rating is 4.0 stars (5 ratings). Rate now:


Average performance in benchmarks

⌀ Single core performance in 6 CPU benchmarks
⌀ Multi core performance in 8 CPU benchmarks

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 i5-8600K Intel Core i5-8600K
6C 6T @ 4.30 GHz
1261 (100%)
Intel Core i5-9400F Intel Core i5-9400F
6C 6T @ 4.10 GHz
1005 (80%)

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 i5-8600K Intel Core i5-8600K
6C 6T @ 4.10 GHz
6832 (100%)
Intel Core i5-9400F Intel Core i5-9400F
6C 6T @ 3.90 GHz
5341 (78%)

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 i5-8600K Intel Core i5-8600K
6C 6T @ 4.30 GHz
1251 (100%)
Intel Core i5-9400F Intel Core i5-9400F
6C 6T @ 4.10 GHz
1085 (87%)

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 i5-8600K Intel Core i5-8600K
6C 6T @ 4.10 GHz
5631 (100%)
Intel Core i5-9400F Intel Core i5-9400F
6C 6T @ 3.90 GHz
4722 (84%)

Geekbench 6 (Single-Core)

Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The single-core benchmark only evaluates the performance of the fastest CPU core, the number of CPU cores in a processor is irrelevant here.
Intel Core i5-8600K Intel Core i5-8600K
6C 6T @ 4.30 GHz
1532 (100%)
Intel Core i5-9400F Intel Core i5-9400F
6C 6T @ 4.10 GHz
1346 (88%)

Geekbench 6 (Multi-Core)

Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The multi-core benchmark evaluates the performance of all of the processor's CPU cores. Virtual thread improvements such as AMD SMT or Intel's Hyper-Threading have a positive impact on the benchmark result.
Intel Core i5-8600K Intel Core i5-8600K
6C 6T @ 4.10 GHz
5831 (100%)
Intel Core i5-9400F Intel Core i5-9400F
6C 6T @ 3.90 GHz
5164 (89%)

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 i5-8600K Intel Core i5-8600K
6C 6T @ 4.30 GHz
406 (96%)
Intel Core i5-9400F Intel Core i5-9400F
6C 6T @ 4.10 GHz
423 (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 i5-8600K Intel Core i5-8600K
6C 6T @ 4.10 GHz
2181 (91%)
Intel Core i5-9400F Intel Core i5-9400F
6C 6T @ 3.90 GHz
2407 (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 i5-8600K Intel Core i5-8600K
6C 6T @ 4.10 GHz
10255 (100%)
Intel Core i5-9400F Intel Core i5-9400F
6C 6T @ 3.90 GHz
9463 (92%)

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 i5-8600K Intel Core i5-8600K
6C 6T @ 4.10 GHz
374.8 (100%)
Intel Core i5-9400F Intel Core i5-9400F
6C 6T @ 3.90 GHz
367.5 (98%)

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 i5-8600K Intel Core i5-8600K
6C 6T @ 4.10 GHz
506 (100%)
Intel Core i5-9400F Intel Core i5-9400F
6C 6T @ 3.90 GHz
459 (91%)

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 i5-8600K Intel Core i5-8600K
6C 6T @ 3.60 GHz
2731 (100%)
Intel Core i5-9400F Intel Core i5-9400F
6C 6T @ 2.90 GHz
2550 (93%)

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 i5-8600K Intel Core i5-8600K
6C 6T @ 4.30 GHz
183 (100%)
Intel Core i5-9400F Intel Core i5-9400F
6C 6T @ 4.10 GHz
177 (97%)

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 i5-8600K Intel Core i5-8600K
6C 6T @ 4.10 GHz
1040 (100%)
Intel Core i5-9400F Intel Core i5-9400F
6C 6T @ 3.90 GHz
987 (95%)

Cinebench 2024 (Single-Core)

The Cinebench 2024 benchmark is based on the Redshift rendering engine, which is also used in Maxon's 3D program Cinema 4D. The benchmark runs are each 10 minutes long to test whether the processor is limited by its heat generation.
Intel Core i5-8600K Intel Core i5-8600K
6C 6T @ 4.30 GHz
69 (100%)
Intel Core i5-9400F Intel Core i5-9400F
6C 6T @ 4.10 GHz
0 (0%)

Cinebench 2024 (Multi-Core)

The Multi-Core test of the Cinebench 2024 benchmark uses all cpu cores to render using the Redshift rendering engine, which is also used in Maxons Cinema 4D. The benchmark run is 10 minutes long to test whether the processor is limited by its heat generation.
Intel Core i5-8600K Intel Core i5-8600K
6C 6T @ 4.30 GHz
391 (100%)
Intel Core i5-9400F Intel Core i5-9400F
6C 6T @ 4.10 GHz
0 (0%)

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 i5-8600K Intel Core i5-8600K
Intel UHD Graphics 630 @ 1.15 GHz
442 (100%)
Intel Core i5-9400F Intel Core i5-9400F
@ 0.00 GHz
0 (0%)

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 i5-8600K Intel Core i5-8600K
6C 6T @ 4.10 GHz
0 (0%)
Intel Core i5-9400F Intel Core i5-9400F
6C 6T @ 3.90 GHz
74 (100%)

Devices using this processor

Intel Core i5-8600K Intel Core i5-9400F
Unknown Unknown

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