You'll be able to run any game that you can think of.
How well though, is questionable.
If I were you, I'd look into getting some more RAM. :-)
james,
i think that 8gb is more then enough for gaming,
have u ever had that ur 8gb of ram is fully used ?
Why have an i7 processor if you're not going to use all of it?
I'm not saying more RAM is necessary. I'm saying it wouldn't be an idea to invest in it.
*EDIT* RAM is never going to get any cheaper, just more expensive. With some of the new video game systems coming out, I would assume PCs will follow with new processors. Since Samsung released DDR-4 in early 2011, I would assume DDR-5 isn't far away.