So with Nvidia's new gpus coming out i was wondering what i should do. I currently have a gtx 580 and was thinking about getting a second for sli which im pretty sure would out perform a gtx 780. However im not sure if i should get the second for sli or just upgrade to the new gpu since it is a new generation. I'm leaning towards the second 580 just because it will probably give me a bigger performance increase. By the way ive got an i7 2600k overclocked to 4 ghz running on a corsair hx 1050 so im pretty sure my psu will be fully capable of handling two 580s. Any help is appreciated. Thanks!