All of our servers run at 512fps. This is the required fps to achieve 100tickrate.

1000FPS is largely a fad employed by game server providers in order to sell servers. It offers extremely little benefit at all, and extra costs are incurred - for seamingly no reason. The point in raising the fps is to make 100tickrate possible. At 512fps, a fully stable 100tickrate can be achieved. 1000fps, therefore, offers no benefit.