Help?

[Funkid515]

I'm not sure which graphics card to get, do I want a ghz edition or a regular edition? I think I've narrowed it down to three cards, I'm not sure if I should get the Sapphire one, because it's a Ghz edition, will it make a big difference? Here's the three cards, and this is my build, http://pcpartpicker.com/p/AiJy

SAPPHIRE Vapor-X
http://www.newegg.com/Product/Product.aspx?Item=N82E16814202001&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&AID=10446076&PID=3938566&SID=

DIAMOND 7970PE53G
http://www.newegg.com/Product/Product.aspx?Item=N82E16814103201&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&AID=10446076&PID=3938566&SID=

GIGABYTE GV-R797OC-3GD
http://www.newegg.com/Product/Product.aspx?Item=N82E16814125413&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&AID=10446076&PID=6146996&SID=jnwq96x9g5lj

 

[munjoo238]

I would personally pick Ghz edition myself. You can check this benchmark http://www.anandtech.com/bench/Product/508?vs=618