The r270x has 4gb of gddr5 but the gtx 760 super clocked is said to be better than the gtx 680. Which is better? Here are the links
http://pcpartpicker.com/part/gigabyte-video-card-gvr927xoc4gd r270x
http://www.amazon.com/EVGA-SuperClocked-Dual-Link-Graphics-02G-P4-2765-KR/dp/B00DHW4HXY/ref=sr_1_1?ie=UTF8&qid=1398925578&sr=8-1&keywords=gtx+760
gtx760sc
http://pcpartpicker.com/part/gigabyte-video-card-gvr927xoc4gd r270x
http://www.amazon.com/EVGA-SuperClocked-Dual-Link-Graphics-02G-P4-2765-KR/dp/B00DHW4HXY/ref=sr_1_1?ie=UTF8&qid=1398925578&sr=8-1&keywords=gtx+760
gtx760sc