You have got to be kidding? The 650 Ti non boost is on par with the 7850, The 650 Ti boost is well above the 7850, Also the 650 Ti has more than enough memory speed to handle 2GB and so does the 7850. I have no idea were you people get your info from. only a few benchmarks of the 650 Ti have been done and they are usually AMD fanboys doing the reviews. My card is a 650 Ti and it can play all games with eye candy with no problem at all. Yes the 7850 does have a little more power. But it does not justify the huge price gap. My 650 TI was only $104 after tax. The cheapest 7850 I could find was over $140 It is a good card but it is not worth it, If you are going to go around the $150 area you might as well pay a little more and get the 7870 or the 660.
You must be kidding itself. Take a look Anandtech gpu bench13, 7850 is little bit slower than GTX660 but about 10% faster than GTX650ti boost. GTX650ti non boost ain't nowhere speed wise compared to 7850.
http://www.anandtech.com/bench/product/778?vs=781
http://www.anandtech.com/bench/product/778?vs=782