According to the developer, there is no theoretical limit
Doom Eternity will be a fast game and may be too fast for your hardware. The highest possible frame rates are overwhelming even high-end PCs. Even future computers may not have enough features, as there are theoretically no limits, according to developers.
Tech 7 is the name of the new engine introduced by Doom Eternal, and it does have a groundbreaking effect in terms of frame rate. In an interview with US gaming site IGN, developer Billy Kahn revealed that with the right hardware, shooters can display up to 1,000 frames [frames per second].
It is questionable whether there is any hardware that can cope with the release on March 20, 2020. Kahn said that even a computer developed by id Software, a development studio optimized for testing purposes, can reach a maximum of 400 frames per second. Generally, even with fast shooting, the frame rate is up to 60 frames per second.
But that's not all, because theoretically there could be more. According to the developers, thanks to the Tech 7 engine, the frame rate is unlimited. However, even with a limit of 1,000 FPS [frames per second], engines on future PCs and Xbox, Xbox Series and PS5 next-generation consoles should have enough potential to continue offering new ones even years after launch High-quality graphics.