Fairly well. Blockland requires a pretty powerful computer to always get 60+ FPS with shaders on, but most of the time you should be able to run it at max, sometimes even with Port's performance shaders.
It really depends on the brickcount. Once you start getting into higher brickcount servers, you maaaay see some issues. My brother has an R9 280, which is similar to the GTX 760, and he can run Blockland pretty well.
Other thing I forgot to mention is that with Intel LGA 1150 CPUs, you have a better upgrade path then with AMD CPUss.