bit-tech.net takes a look at the X800 GTO.
Lost Coast was dominated by the X800GTO, but we didn't experienceHIS X800 GTO Review
image quality improvements when enabling the enhanced clock speeds. If you disregard the X800GTO, because it is clearly in a league of its own, the GeForce 6800 Std and 6600 GT performed as well as the two X800GT configurations that we've evaluated here. There was very little between the two mid-range NVIDIA parts and the two X800GT configurations and you'd be hard pushed to pick second place behind the GTO.