Nvidia's 9800 GTX was listed at Geizhals.at, at least for a short time. We managed to get a screenshot of the price but the actual listing was pulled off.
In the meantime, we did manage to pull out the specs and the price, and this €276,50 card will work at 675MHz core speed, 1100MHz memory and 1688MHz Shaders clock.
As mentioned, Geforce 9800GTX will have 512MB of GDDR3 memory working at 1100MHz with 256-bit memory interface. It supports 3-way SLI, DirectX 10 and Shader Model 4.0. According to the latest info, this card has been pushed from the original launch date, the 25th of March to the first day of April.
We just hope that this isn't an April Fools' joke. Here is the screenshot taken from Geizhals.at.