The following configuration may seem quite high at the moment. Keep in mind that a Pre-Alpha or Alpha version of a game is not fully optimized yet, therefore it often needs higher requirements than the Official Release version.
Microprocessor: i5 (i7 could be a plus) posterior to 2011 that can support AVX instructions.
Graphic Card: nVidia GTX 960 and above (or Radeon equivalent) with at least 2 Go of memory.
Hard Drive: 40 Go (installing the game on a SSD could be a plus).
RAM: 16 Go.