What is the difference between these 3 GPU's and which one is the best?
http://www.newegg.com/Product/Product.asp?Item=N82E16814150145
http://www.newegg.com/Product/Product.asp?Item=N82E16814150141
http://www.newegg.com/Product/Product.asp?Item=N82E16814150140
http://www.newegg.com/Product/Product.asp?Item=N82E16814150145
http://www.newegg.com/Product/Product.asp?Item=N82E16814150141
http://www.newegg.com/Product/Product.asp?Item=N82E16814150140