Nvidia to paper launch GTX580 in a week
 

We told you about the GTX580 a few weeks ago and now a few more details have come out. The short story is that the chip behind the GTX580, the GF110, is nothing more than a bug fixed GF100. If you think this should be called the GF100b, you are right. If you think performance will underwelm, you are right too.

A fully working GF100, a first for Nvidia's desktop Fermi/GF1x0 line, would have 512 shaders and get about a 7% speed increase over GTX480. Another 6% comes from the clock speed, a generous assessment would say bug fixes add a little more. All told, 20% net speed increase over GTX480 isn't out of the question, nor is a pretty decent lowering of power. The chip is still going to be obscenely huge, and, well, it won't be enough to beat the competition. Heck, it won't be enough to beat the current champ, AMD's HD5970/Hemlock, much less the upcoming Cayman and Antilles parts. It is going to be a slaughter.
http://www.semiaccurate.com/2010/10/...h-gtx580-week/