I have just one EVGA GTX 680 SC Edition GPU with 2GB VRAM, I can run most of games on high settings with an average of 60fps. I have a single monitor which runs at 1920x1080 resolution and no interest in purchasing a 4k monitor in the near future. I am seeing games requiring 4GB or more of VRAM to run them on high or maxed settings. I was curious as to what I should do to continue to enjoy playing games at their maxed or high settings. Either purchase a used or refurbished 680 and put it in SLI, or purchase a newer GPU and if so what GPU will give me the best dollar to performance ratio and how much of an actual increase I would see in % from my current GPU. Should I wait longer maybe another year before retiring this card to get a much more noticeable increase in performance?