Intel Core i3-8350K vs Intel Core i5-8400

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CPU comparison with benchmarks


Intel Core i3-8350K CPU1 vs CPU2 Intel Core i5-8400
Intel Core i3-8350K Intel Core i5-8400

CPU comparison

In this CPU comparison, we compare the Intel Core i3-8350K and the Intel Core i5-8400 and use benchmarks to check which processor is faster.

We compare the Intel Core i3-8350K 4 core processor released in Q4/2017 with the Intel Core i5-8400 which has 6 CPU cores and was introduced in Q4/2017.
Intel Core i3 (202) Family Intel Core i5 (328)
Intel Core i 8000 (20) CPU group Intel Core i 8000 (20)
8 Generation 8
Coffee Lake S Architecture Coffee Lake S
Desktop / Server Segment Desktop / Server
Intel Core i3-7350K Predecessor Intel Core i5-7400
Intel Core i3-9350K Successor Intel Core i5-9400

CPU Cores and Base Frequency

The Intel Core i3-8350K is a 4 core processor with a clock frequency of 4.00 GHz. The processor can compute 4 threads at the same time. The Intel Core i5-8400 clocks with 2.80 GHz (4.00 GHz), has 6 CPU cores and can calculate 6 threads in parallel.

Intel Core i3-8350K Characteristic Intel Core i5-8400
4 Cores 6
4 Threads 6
normal Core architecture normal
No Hyperthreading No
Yes Overclocking ? No
4.00 GHz Frequency 2.80 GHz
-- Turbo Frequency (1 Core) 4.00 GHz
-- Turbo Frequency (All Cores) 3.80 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 i3-8350K Characteristic Intel Core i5-8400
-- AI hardware --
-- AI specifications --

Internal Graphics

Graphics (iGPU) integrated into the processor not only enable image output without having to rely on a dedicated graphics solution, but can also efficiently accelerate video playback.

Intel UHD Graphics 630 GPU Intel UHD Graphics 630
0.35 GHz GPU frequency 0.35 GHz
1.15 GHz GPU (Turbo) 1.15 GHz
9.5 GPU Generation 9.5
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 64 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 UHD Graphics 630 GPU Intel UHD Graphics 630
Decode / Encode Codec h265 / HEVC (8 bit) Decode / Encode
Decode / Encode Codec h265 / HEVC (10 bit) Decode / Encode
Decode / Encode Codec h264 Decode / Encode
Decode / Encode Codec VP9 Decode / Encode
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

Up to 64 GB of memory in a maximum of 2 memory channels is supported by the Intel Core i3-8350K, while the Intel Core i5-8400 supports a maximum of 128 GB of memory with a maximum memory bandwidth of 42.7 GB/s enabled.

Intel Core i3-8350K Characteristic Intel Core i5-8400
DDR4-2400 Memory DDR4-2666
64 GB Max. Memory 128 GB
2 (Dual Channel) Memory channels 2 (Dual Channel)
38.4 GB/s Max. Bandwidth 42.7 GB/s
Yes ECC No
-- L2 Cache --
8.00 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 Intel Core i3-8350K has a TDP of 91 W. The TDP of the Intel Core i5-8400 is 65 W. System integrators use the TDP of the processor as a guide when dimensioning the cooling solution.

Intel Core i3-8350K Characteristic Intel Core i5-8400
91 W TDP (PL1 / PBP) 65 W
-- TDP (PL2) --
-- TDP up --
-- TDP down --
100 °C Tjunction max. --

Technical details

The Intel Core i3-8350K has 8.00 MB cache and is manufactured in 14 nm. The cache of Intel Core i5-8400 is at 9.00 MB. The processor is manufactured in 14 nm.

Intel Core i3-8350K Characteristic Intel Core i5-8400
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 Q4/2017
170 $ Release price 260 $
show more data show more data


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 i3-8350K Intel Core i3-8350K
4C 4T @ 4.00 GHz
1172 (100%)
Intel Core i5-8400 Intel Core i5-8400
6C 6T @ 4.00 GHz
1053 (90%)

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 i3-8350K Intel Core i3-8350K
4C 4T @ 4.00 GHz
3855 (84%)
Intel Core i5-8400 Intel Core i5-8400
6C 6T @ 3.80 GHz
4608 (100%)

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 i3-8350K Intel Core i3-8350K
4C 4T @ 4.00 GHz
1426 (100%)
Intel Core i5-8400 Intel Core i5-8400
6C 6T @ 4.00 GHz
1322 (93%)

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 i3-8350K Intel Core i3-8350K
4C 4T @ 4.00 GHz
4326 (90%)
Intel Core i5-8400 Intel Core i5-8400
6C 6T @ 3.80 GHz
4814 (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 i3-8350K Intel Core i3-8350K
4C 4T @ 4.00 GHz
447 (100%)
Intel Core i5-8400 Intel Core i5-8400
6C 6T @ 4.00 GHz
411 (92%)

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 i3-8350K Intel Core i3-8350K
4C 4T @ 4.00 GHz
1711 (75%)
Intel Core i5-8400 Intel Core i5-8400
6C 6T @ 3.80 GHz
2291 (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 i3-8350K Intel Core i3-8350K
Intel UHD Graphics 630 @ 1.15 GHz
442 (100%)
Intel Core i5-8400 Intel Core i5-8400
Intel UHD Graphics 630 @ 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 i3-8350K Intel Core i3-8350K
4C 4T @ 4.00 GHz
6960 (75%)
Intel Core i5-8400 Intel Core i5-8400
6C 6T @ 3.80 GHz
9259 (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 i3-8350K Intel Core i3-8350K
4C 4T @ 4.00 GHz
1781 (72%)
Intel Core i5-8400 Intel Core i5-8400
6C 6T @ 2.80 GHz
2482 (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 i3-8350K Intel Core i3-8350K
4C 4T @ 4.00 GHz
171 (100%)
Intel Core i5-8400 Intel Core i5-8400
6C 6T @ 4.00 GHz
163 (95%)

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 i3-8350K Intel Core i3-8350K
4C 4T @ 4.00 GHz
684 (74%)
Intel Core i5-8400 Intel Core i5-8400
6C 6T @ 3.80 GHz
925 (100%)

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 i3-8350K Intel Core i3-8350K
4C 4T @ 4.00 GHz
0 (0%)
Intel Core i5-8400 Intel Core i5-8400
6C 6T @ 4.00 GHz
62 (100%)

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 i3-8350K Intel Core i3-8350K
4C 4T @ 4.00 GHz
0 (0%)
Intel Core i5-8400 Intel Core i5-8400
6C 6T @ 4.00 GHz
283 (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 i3-8350K Intel Core i3-8350K
4C 4T @ 4.00 GHz
0 (0%)
Intel Core i5-8400 Intel Core i5-8400
6C 6T @ 3.80 GHz
79 (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 i3-8350K Intel Core i3-8350K
4C 4T @ 4.00 GHz
0 (0%)
Intel Core i5-8400 Intel Core i5-8400
6C 6T @ 3.80 GHz
400.9 (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 i3-8350K Intel Core i3-8350K
4C 4T @ 4.00 GHz
0 (0%)
Intel Core i5-8400 Intel Core i5-8400
6C 6T @ 3.80 GHz
450 (100%)

Devices using this processor

Intel Core i3-8350K Intel Core i5-8400
Unknown Unknown

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