which card or cards will make my pc a high performance gaming computer

madcap42

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Basically i have a gigabyte gtx 670,ga-z77x-ud5h motherboard, 16 gb corsair vengeance ram,i7 3770k,I run 3d mark and it says my computer is not quite enough to be high performance gaming pc, I wanna change that now do i buy another gtx 670 and sli them or just go and buy the gtx 690 will it be worth the extra money for the gtx 690 and will i have a high performance gaming pc,
 

madcap42

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yeah but when i run the last program in 3d mark you can see low fps and lag
 

madcap42

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I have no problem with games, i just want that bit extra, just not too sure whether to get another gtx 670 or get the gtx 690 or even get two gtx 680's which will be slightly cheaper
 

madcap42

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I see what your saying but i would like a setup for future games as well, i would like to be able to play nearly all games at max, the fact is i'm gonna get one or the other just wanted to know what woulds be the best idea ?