The vapor x has a better heatsink on it. I would ussually reccoment a vapor x 7770 because there is a pretty good chance that you could get a 650ti for the same price or less. http://www.newegg.com/Product/Product.aspx?Item=N82E16814127725
I would seriously take a look at the 650ti boost if you are thinking of getting a new card though.
i found Galaxy GeForce GTX 650 Ti GC 1GB GDDR5 ......
should i buy it or buy SAPPHIRE VAPOR-X HD 7770 ?