November, The G80 was release in November 2006 and Nvidia will release their next line in November this year.
http://news.softpedia.com/news...flops-Club-55548.shtml
NVIDIA has recently unveiled some spicy info on their latest G92 developments. This is the successor of the current G80 GPU and according to Michael Hara, vice president of the "green" company, the chip will be ready by
Christmas 2007. This means that NVIDIA will try to update their high-end graphics card sector every fourth semester in the years to come. This release cycle was adopted with the G80 GPU last year, leaving the mid-range and low-end products for a spring release.