How well will my setup run games?

It won't do games very well, you have to get a graphics card as well.
7870 $254
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
7950 $300
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
660 $230
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Check some benchmarks and see which one you think is worth getting. I feel like those are the three cards that are most worth getting between 200 and 400.

Currently, wouldnt expect even medium settings.
Need a graphics card if you want to game.

To think that's the one item i've been thinking about the most lately, i'm stupid. I'm getting a sapphire radeon 7850.

That will play most games on ultra and a few would be on high. Also look at the 660. It might be worth it.

What games will you be playing?

It looks like the 7850 is great for me, but now I have one other question. I've been looking at these 2 cards, but i'm not sure what the differences are.

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

I was planning to get the first one, but the 2nd one has muchhh better reviews, what's the difference between them?

There should be no difference. Same GPU, same amount of VRAM, same memory bus, and as far as I can tell the same clocks.

Only real difference I can see.
The cheaper one has two DVI ports, one HDMI and one Displayport output.
The more expensive one has two mini-Displayport, one HDMI and one DVI.

Would go for the cheaper one, more useful display outputs (Displayport is the best, but only high end monitors support it).

I can't tell a difference, I would go with the cheaper one.

Alright, thanks a lot guys.  

Best answer selected by ValiantWolf.