I know what you mean about not having quite good enough performance on games with the 770. I have one too and on a lot of demanding games like Crysis 3 I'm so close to a consistent 60 fps, on ultra at 1080p but it dips under the 60 mark and hovers around the 60 but not all was staying at 60 fps. I have a 144 Hz monitor and if I can play my games at 60 fps then it's usually lot more fun than being stuck around 45. If you've got a case with good airflow, unless you liquid cool, then I'd say just buy another 770. I'm planning on buying another 770 myself and putting it in SLI with my other card. Don't worry about all the people who talk about driver problems with SLI, it's not as common as problem as they'd like to make you think.