As F.E.A.R. is game engine wise, in terms of graphics, A.I, and physics, very computationally intensive, Monolith have pushed the engine to its limits with F.E.A.R. using soft shadows, real geometric results of damaging, specularity all over the environment, advanced A.I; doing things only previously possible pre-scripted, but now on the fly, real-time physics, which is only really a taste of the potential of both the game and the game engine.

So therefore, the likely fact is the game is going to demand a lot out of your system setup, you utterly need a modern system to run it. This page shall list what the minimum and recommended system requirements are:

Minimum:

Intel or AMD class 3.0 GHz CPU or better.

1GB of RAM or more.

256MB DirectX 9 Shader Model 2.0 supporting ATi or nVidia graphics card or better.