Yesterday TweakTown compared the performance of nVidia's GeForce FX 5950 Ultra against ATI's Radeon 9800 XT. Today they step down a class to the mainstream segment and put nVidia's GeForce FX 5700 Ultra, in the form of the AA5700U from Chaintech, against ATI's Radeon 9600 XT. Let the mainstream VGA battle begin!