Hardware.Info published their gaming PC building guide for August 2018
A quote from the article:
This computer system is specifically geared towards gaming at WQHD resolution. That means a PC with a high-end graphics card and a processor that is fast enough to support the GPU, but also a fast monitor to display the rendered frames in the best way.Gaming PC - August 2018
The rest of the configuration needs to be balanced as well. Since many gamers also enjoy overclocking their PC to improve performance, it is also important to choose a motherboard and memory that is suitable for this. Keep in mind that you will pay extra for that overclocking potential.