Owning the performance crown isn't enough; Nvidia wants to rule the mainstream, too. The GPU maker's highly popular G92 core has nearly defined the term 'bang-for-buck,' and Nvidia plans to tweak the core one more time to steal some thunder away from AMD's upcoming Radeon HD 4850. The new 9800 GTX+ will shrink the G92 core from 65nm to 55nm, and push the core, shader, and memory clockspeeds to 738MHz, 1836MHz, and 1000MHz respectively. The new card will retail at $249. And if that wasn't enough, the original 9800 GTX will drop down to $199. In other words, game on, AMD.