Hi im am looking into buying a new graphics card I currently have this one http://www.newegg.com/Product/Product.aspx?Item=N82E16814162079 im looking at this one http://www.newegg.com/Product/Product.aspx?Item=N82E16814127852 and this one http://www.newegg.com/Product/Product.aspx?Item=N82E16814202113 im not sure if there better then mine as all there core speed is around the same but my current one has shader core also I know the GeForce gt 730 is newer and support direct 12 but it doesn't seem that good and im not familr with radeon cards can you please shead some light on this my pc specs are as follows cpu amd fx 6300 motherbored gigabyte 78lmt-usb3 4 4gb ram for total of 16gb ddr3 and 750w psu