the gpu in the xbox 360 is basically a premature version of the r600 from ATI, which will be their first line of direct x 10 cards. so to answer your question. no. the 7600gt is far from close. the absolute peak performance that you recieve from the gpu in the xbox 360 is not as high as the x1900xtx or 7900gtx, but, it is much more efficient in the way that it always uses say.. 90% of it's power rather than the 7900gtx and the x1900xtx, which use much much less, therefore, in the end, the overall performance of the r600 in the xbox 360 will be better than the x1900xtx. the best gpu to compare it with right now would probably be the 8800gtx.