It really depends on how you want to play it, as the requirement difference between 1080p single screen vs. Valve Index are massive. As opposed to most other fl

It really depends on how you want to play it, as the requirement difference between 1080p single screen vs. Valve Index are massive. As opposed to most other flight sims, you'll want a GPU that is pretty close in performance to your CPU (which should be as powerful as possible). So essentially you want as good as you can afford / actually find in stock.