As above. The Kolink power supply used only provides 408W on the 12v rail. It could run a non-overclocked mainstream system with a non-overclocked GTX 1080 but is still not the sort of PSU you'd want powering such a card.
You can put any spec you want together, and ask for a quote. Don't have to restrict yourself to configurator/pre-built. Or if you like the majority of the parts in a pre-built and just want to change one or two things, you can do that instead (if permitted).