Between these GTX 780's, is there any difference besides the increased stock overclock? And more importantly to me, do any of them have a backplate included? If not, where can I buy one?
http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=8181478&CatId=7387
http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=8428289&CatId=7387
http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=8521679&CatId=7387