What performance upgrade will I see?

[Tobias Radford-Taylor]

Hi, I have a 4770k, 8gb ram and msi gtx 670 oc. I am thinking of uprgrading to 16gb of ram and adding a second 670. any ideas on extra performane? If you need more info that is fine. if possible could you give fps or a link to a calculator if there is one. i cant find one.

 

[Jaxem]

The ram won't change your performance at all, but with sli/crossfire, you usually see an 75-90% increase in fps depending on the cards and games.