Anandtech has another fine review online for your scanning eyes. Nvidia is taking the mobile performance crown back from ATI's Radeon Mobility 9000. Here is a snip: Today NVIDIA responds to the ATI Mobility Radeon 9000, a chip launched at the end of August that has already found its way into twenty shipping notebook machines. NVIDIA's answer is the NV28M based GeForce4 4200 Go, a mobile version of the NV28 core. The GeForce4 4200 Go does more than just include the full feature set of the desktop NV28 core used in the GeForce4 Ti 4200 AGP 8x; it also incorporates the power saving technology that is so important for notebook machines.

The desktop version of the chip (the NV28 in a 64MB configuration like the configuration of the GeForce4 4200 Go) runs at a 250MHz core and a 500MHz (250MHz DDR) memory bus. In contrast, the GeForce4 4200 Go has the ability to run at a maximum speed of 200MHz core and 400MHz (200MHz DDR) memory. Expect to find chips performing at this pace only in desknote type systems. The majority of notebooks, including the notebook version that we were given to test on, will be running at around the 175MHz core mark and a 400MHz (200MHz DDR) memory bus (ours ran at 175MHz/200MHz DDR). The reason for this: the GeForce4 4200 Go produces a lot of heat and draws a lot of power running at 200/200MHz DDR. GeForce 4 Go 4200: Maximum Mobile Gaming