In the case of the 660ti yes. The only nvidia card I would recommend right now by nvidia is the 660. The 7950 has performance more comparable to a 670, and is $50 cheaper, they also overclock better. About ram disk. While yes you could dedicate 8gb to ram. What are you going to store on that? Not many things take up less than 8gb ram anymore. I don't think it is worth it so you can put one average size game on.