All those games you listed are old and will run on old computers, especially FEAR. That game is just old. I run it on max on my intel hd gpu.
While FEAR is old, Skyrim came out in 2011 (Currently 2013). To call it old is like saying that the song "Call me Maybe" is old, which it most certainly is not.
My point I meant to make on my last post is that your PC and your games may not
always play nice.
A better example of a bad engine would be The Powder Toy. Because it doesn't support multi core processing, a computer with a 3Ghz single core will run it better than an i7 quad core at 2.4Ghz.