You won't need a powerful PC to kill zombies.
Saber Interactive has announced World War Z official PC system requirements. What kind of PC do you need to kill swarms of zombies?
When we look to World War Z system requirements, we can say you don't need a powerful PC to run the game (i5 and GT 730 is enough to play it) . But if you want to play game smoothly, you will need third generation i7 and GTX 960 or Radeon R9 280 at least. Saber Interactive didn't state how much FPS you can get with these hardware.
World War Z Minimum System Requirements
World War Z Recommended System Requirements
World War Z will release on April 16, 2019 on PlayStation 4, Xbox One and Windows PC (Epic Games Store). Is your PC enough to play the game?