Intel Core i7 8700K / i5 8600K / i5 8400 'Coffee Lake' review: affordable six cores!

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How does Hardware.Info test processors?

Since June 2017 Hardware.Info uses an entirely renewed test method for processors with a set of new, up-to-date benchmarks.

All processors are tested using the Windows 10 Creators Update with the energy profile set to High Performance (unless stated otherwise). Most of our benchmarks are done using the in processors integrated GPU, while a processor without iGPU (e.g. Intel Skylake-X or AMD Ryzen) are used in conjunction with a GeForce GTX 1050 Ti. 

All of the game benchmarks are done in conjunction with a GeForce GTX 1080 Ti at Full HD resolution using medium and ultra settings. We choose this relatively low Full HD resolution because if possible the bottleneck is not the GPU but the CPU. In the first two graphs you can find the average amount of frames per second that is calculated (FPS). Even more interesting is the 99th percentile frametime, seen in the last two graphs. This is the time in which 99% of all images in the test were calculated. A lower 99th percentile frametime means a lower maximum delay when calculating a new frame. It is a better method to show the worst-case performance of a CPU/GPU-combination instead of the minimum FPS that a lot of other publications show.

All test systems use 8 GB of memory per channel (16 GB with dual-channel and 32 GB with quad-channel) working at the highest clock frequency that is officially supported by the processors. We also use Samsung 850 Evo SSDs and Seasonic Prime Titanium 750W power supplies.

We measure the power consumption with a professional EMU 1.X4. 

A list of the used benchmarks:

  • Content creation
    • Abobe Lightroom 6
    • Adobe Photoshop CC 2017 - Photo editing
    • Adobe Photoshop CC 2017 - Panorama
    • Adobe Premiere Pro 2017 - 4K Hardware.Info TV export
  • Video- and audio-encoding
    • x264 encoding
    • H.264 QuickSync / VCE encoding
    • x265 encoding
    • FLAC encoding
  • 3D-rendering
    • Blender 2.78c
    • Cinebench 15 (single and multi threaded)
  • Data-compression and -encryption
    • 7-Zip
    • WinRAR
    • AIDA64 - Zlib
    • AIDA64 - AES
    • AIDA64 - Hashing
  • Web-browsing and Microsoft Office
    • Chrome 58 - Jetstream
    • Microsoft Word 2016 - 1000 pages to PDF
    • Microsoft Excel 2016 - Monte Carlo stock analysis
  • Integrated GPU benchmarks
    • 3DMark Skydiver
    • Counterstrike: GO
    • Minecraft
    • Dota 2
  • Gaming benchmarks (GTX 1080 Ti)
    • Battlefield 1
    • Doom
    • GTA V
    • Prey
    • Rise of the Tomb Raider
  • Power consumption
    • Cinebench 15
    • 3DMark Skydiver (iGPU)
    • Adobe Premiere
    • Idle

The table below shows the specifications of our test systems.

Platform LGA1151-v2 LGA1151 LGA2066 Socket AM4
Motherboard ASRock Z370 Extreme 4 ASUS Maximus VIII Ranger ASUS Prime X299-A ASUS Crosshair VI Hero
Chipset Intel Z370 Intel Z170 Intel X299 AMD X370
Memory G.Skill
16GB DDR4-2666
G.Skill
16GB DDR4-2400
G.Skill
32GB DDR4-2666
G.Skill
16GB DDR4-2666
SSD Samsung 850 Evo 500GB Samsung 850 Evo 500GB Samsung 850 Evo 500GB Samsung 850 Evo 500GB
Power supply Seasonic Prime Titanium 650W Seasonic Prime Titanium 650W Seasonic Prime Titanium 650W Seasonic Prime Titanium 650W
Graphics card (IGP tests) - - Nvidia GeForce GTX 1050 Ti Nvidia GeForce GTX 1050 Ti
Graphics card (other tests) Nvidia GeForce GTX 1080 Ti Nvidia GeForce GTX 1080 Ti Nvidia GeForce GTX 1080 Ti Nvidia GeForce GTX 1080 Ti
OS Windows 10 x64 Creators Update Windows 10 x64 Creators Update Windows 10 x64 Creators Update Windows 10 x64 Creators Update

 


Compare

three products discussed in this review

  Product Lowest price

Intel Core i5 8400 Boxed

Socket 1151, 2.8 GHz, 6 cores, 65 W, 14 nm, Integrated graphics

Specifications Test results Reviews Prices

£191.49

Avg. £196.72
5 shops, no stock

Intel Core i5 8600K Boxed

Socket 1151, 3.6 GHz, 6 cores, 95 W, 14 nm, Integrated graphics

Specifications Test results Reviews Prices

£269.99

Avg. £283.50
6 shops, 4x stock

Intel Core i7 8700K Boxed

Socket 1151, 3.7 GHz, 6 cores, 95 W, 14 nm, Integrated graphics

Specifications Test results Reviews Prices

£377.99

Avg. £399.98
6 shops, 4x stock

Also read these processor articles on Hardware.Info

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