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The market for people buying an expensive CPU and using it for gaming at 1080p is likely to be very slim. What 1080p does is give a good indication of the CPU's raw gaming performance as GPU power is sufficient to push frame rates to a level where the CPU and memory limitations can be observed.
We supplement the 1080p gaming results with a pair of games tested at 4K. We chose Ghost Recon Wildlands and GTA V as they are computationally-heavy, open-world games with good built-in benchmarks.
Ghost Recon Wildlands
We run the built-in benchmark using a 4K resolution and the same settings as the 1080p test (Very High preset).
Grand Theft Auto V
We run the built-in benchmark using a 4K resolution and the same settings as the 1080p test (generally Maximum quality settings including Advanced Graphics).
4K Gaming Performance Overview:
Intel's Kaby Lake quad-cores, such as the i7-7700K, tend to be fractionally faster in Ghost Recon Wildlands but the realistic difference is negligible and more commonly due to numerical rounding.
GTA V still shows preference for Intel hardware even at 4K but the performance difference is minor at around 5 FPS on average (around 7%). Minimum FPS performance remains strong for Threadripper, despite the variance induced by GTA V's benchmark. However, overclocking the 12- and 16-core chips repeatedly reduced the minimum FPS figures slightly. This may be due to the reduced all-core frequency compared to the stock-clocked XFR boost capabilities.
For 4K60 gamers, all of the CPUs on show are perfectly good options.
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