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Intel 8th Generation Core i7 8700K & Core i5 8400 Review


Intel 8th Generation Core i7 8700K & Core i5 8400 Testing:

The first part of our testing will involve system-specific benchmarks.


Let's get started with Apophysis. This program is primarily used to render and generate fractal flame images. We will run this benchmark with the following settings:

  • Resolution: 2750 x 2048
  • Quality: 500
  • Limit Memory use: 512 MB



The measurement used is time to render, in minutes, to completion.





Lower is Better


WinRAR is a tool that archives and compresses large files to a manageable size. Here, we will test the time needed to compress files of 100 MB and 500 MB. Time will be measured in seconds.




Lower is Better





Lower is Better


Bibble 5:

This test consists of converting one hundred 8.2 MP RAW images to JPEG format. The original file size is 837 MB. The measure used for comparison is time needed to convert the file, in seconds.


Lower is Better


Geekbench 4:

Geekbench 4 is a benchmark that tests CPU performance in an easy-to-use tool. The measure used for comparison are the CPU Single Core and Multi Core tests.


Higher is Better


In Apophysis, the Core i7 8700K delivers very good performance both stock and overclocked. It falls just shy of the Kaby Lake-based chips in this comparison. The six-core Coffee Lake chips also handily outperform the Ryzen 5 1600X and R7 1800X. The Core i5 8400 does well by comparison. In the WinRAR testing, the Core i7 8700K again outperforms the R5 1600X in the RAR testing, but the R5 1600X and Core i7 8700K are just about dead even in the ZIP testing. The Core i5 8400 compares well with the R5 1500X.

Bibble 5 is all about multi-threaded workloads. Here we see that more cores equal a lower time to complete the file conversion, although core clock speed is a crutch. The Coffee Lake-S Core i7 8700K was about a second faster in this test than the R5 1600X it matches up perfectly with on core/thread count. The Core i5 8400 does place well against the R5 1500.

In the Geekbench test, the single core scores for the Core i7 8700K show that the high Turbo Boost 2.0 clock speed of 4.7GHz allows it to finish at the top of this comparison. In the multi-core test, the Core i7 8700K again bests the R7 and R5 lineup from AMD thanks to its baseline clock speeds. The Core i5 8400 is no slouch either by comparison.

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