Gigabyte gtx 660:
http://www.newegg.com/Product/Product.aspx?Item=N82E16814125443
R9 270:
http://www.newegg.com/Product/Product.aspx?Item=N82E16814127769&RandomID=738892423429520140418161203
The 270 would probably be better but the link is broken for the 660
Oh my bad. Do you know where I can get some gpu benchmarks
http://www.hwcompare.com/16566/geforce-gtx-660-vs-radeon-r9-270/
Thank you for the reply and the link