By older games do u mean like call of duty 4, far cry 2 and fallout 3?
That's what I mean! You'll find out that you would be happier if you stuck to games that your computer will run at "recommended", than "minimum" settings. Running a game with just the "minimum" requirements isn't a whole lot of fun.
My computer is better than the "recommended" requirements for Bad Company 2 and it's frame rates will drop below 30 on high settings. The medium settings for Bad Company 2 are pretty awesome though.
I'd say though, from your WEI score, you should be able to run most all games that came out last year with your computer. this years games are going to be hit and miss for you.
I was just looking at the requirements for some of my games and the only one that I suggest you not try is "Brothers in Arms", H_ll's highway.
You should be able to run: Call of Juarez Bound in Blood, Modern Warfare 2, Arkum Asylum, Call of Duty World at War, Wolfenstein, Left for Dead 2, and Resident Evil 5.