Nvidia has officially launched two mobile versions of its flagship GPU series. The GeForce Go 7900 GS and GTX pack known technologies such as Shader Model 3.0, high dynamic range (HDR) and PureVideo H.264 hardware acceleration. The GTX model offers 38.4 GB/s memory bandwidth and 12 billion pixels per second fill rate while the GS is limited to 32 GB/s and 7.5 billion. The chips are initially available in Dell and Toshiba notebooks.