Nvidia is bringing forward the launch date of its upcoming GeForce 8800 GT (G92) GPU to October 29 from the original November 12, targeting AMD"s new Radeon HD 2950PRO (RV670) as the major competitor, according to sources at graphics card makers. With G92 and RV670 having a tight performance/price ratio, Nvidia"s earlier launch should give the company an advantage in the market, noted the sources