The retail marketplace may be in NVIDIA's favor at the moment but the performance leader crown is a trophy desired by both companies, for the prestige and bragging rights if nothing else. Therefore, once the Radeon X1800 XT was introduced, it was only a matter of time before NVIDIA came up with its answer. Compared to the top of the range Radeons, the GeForce 7800 GTX cards are somewhat hampered by its 256MB frame buffer, a situation which NVIDIA has quickly corrected. And if that's not enough, the clock speeds for both the G70 core and the memory have been ramped up, which meant more stringent testing and qualifying the core for the higher frequencies and using faster DDR memory to achieve this..



Link: Hardware Zone