G71 is Nvidia's next generation high end chip
 

IT HAPPENS every four months. Nvidia set the new trend of releasing its new top end card every four months and it's not going to stop now. It just released its ghost Geforce 7800 GTX 512 product and the demand for it is incredible. A lot of people want it as it’s the fastest card around for Yule but you just can not get any.
G71 will end up with a new Geforce name, new number and probably GTX suffix but it's still too early to talk about the final name. It will have a very fast core, we still don’t know the number but it should be around 700MHz and it's obviously paired with super fast memory. The memory is not the problem and even Samsung memory running at 1700 MHz+ is not in tight supply.

http://www.theinquirer.net/?article=28227