How does 2 4809's in crossfire setup compare to a single 4870x2. Is it better? or about even. I was thinking about getting 2 of these cards in the link below, what do you think?
http://www.newegg.com/Product/Product.aspx?Item=N82E16814150359
http://www.newegg.com/Product/Product.aspx?Item=N82E16814150359