
Official Portal 2 system requirements, player reports on Portal 2 performance, and a check against your GPU and CPU.
Published on the Steam store page by the developer. This is that text, not a benchmark.
Portal 2 generally runs well on various hardware, with some reports of good optimization and smooth gameplay. However, there are occasional performance issues mentioned on lower-end systems.
Drawn from 16 reviews that mention performance.
Pick a GPU and a CPU. The result compares their class with the parts named in the official requirements. It is not an FPS estimate.