How would the sapphire hd6670 1gb perform in combination with the amd athlon 2 x2 250 (3.0 Ghz)?

It will work ok but not great. Because i have limited budget i would recommend you to get AMD Phenom II X4. You will have better performing. a href="http://www.newegg.com/Product/Product.aspx?Item=N82E16819103808" rel="nofollow"http://www.newegg.com/Product/Product.as…/a