It appears that Nvidia gave its partners a lot of design leeway to its partners when it comes to GTX 650 Ti graphics card and it looks like that it will not be limited to 1GB of VRAM, and some partners will do a 2GB version from day one.
Early listings at our price search engine shows the Gigabyte GV-N65TOC-2GI graphics card and currently this is the only one we have seen so far. This, of course, does not mean that we will not see similar 2GB versions from other partners as well.
According to this early listing, the 2GB version is about 20€ more expensive but as we said, these are early listings and price could change as we draw closer to the launch day.
Of course, it is left to be seen if the GTX 650 Ti will be actually limited by 1GB of memory or will it be able to benefit from additional 1GB of video memory.
You can check out the listing here.