The market for people buying an expensive CPU and using it for gaming at 1080p is likely to be limited. 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 three games tested at 2560×1440 resolution. We chose Deus Ex: Mankind Divided, Far Cry 5, and The Division 2. Deus Ex and The Division 2 are particularly GPU heavy at higher resolutions and Far Cry 5 is a (relatively) computationally-heavy, open-world game.
Deus Ex: Mankind Divided
We run the built-in benchmark using a 2560×1440 resolution and the same settings as the 1080p test (Ultra preset).
Far Cry 5
We run the built-in benchmark using a 2560×1440 resolution and the same settings as the 1080p test (Ultra preset).
The Division 2
We run the built-in benchmark using a 2560×1440 resolution and the same settings as the 1080p test (Ultra preset).
1440P gaming places more load on the GPU thus squeezing the performance margins. AMD's Ryzen 9 3950X continues to hold its own by offering frame rates than even high refresh rate gamers are likely to be happy with.