I personally go with NVidia the GTX is a grwat card from the right companies and it has double the memory and core clock on X1800XT i believe is 625mhz and memory is 1500mhz, the 7900GTX is 650+mhz core and 1600+mhz memory...now the Radeon X1900XTX is prolly more of the equivalent to a 7900GTX, Nvidia has digital vibrance too Makes stuff look ALOT better