if you want to know technicalities, read the b3d post. i used that, and the RSX specs given at E3, and the fact that Nvidia has stated that G70 and RSX will use the same technologies and same architecture, only the numbers like vertices /sec and clockspeed will be more than g70, its like the difference between the medium g70 and 7800 GTX, you have to take into consideration that ATI has put special emphasis on the unified architure and the eDram which will boost the performance of the GPU much further than even its younger cousin in the form of R520 even if both are different architectures. ATI has emphasised that the Efficiency that can be achieved with the hardware is around about 90% compared to all the PC Architecture GPUs which is around 50-60%. the G70 and RSX are technologically the same architecture, meaning just like when Nvidia had their graphics card in the Xbox, they had essentially the PC hardware but custom designed to fit specifically for bandwidth and console purposes to work as a console component. The Same is happening with the RSX where the RSX is a g70 varient and its being custom designed in terms of connectively with the Cell, higher clockspeeds specifically and slightly higher integer numbers compared to the 7800 GTX. The difference as i said before will be around between the difference in 7800 Medium and 7800 GTX. But when we take into consideration ATI. they have specifically said the technology and performance you will see in the Xenos will not be seen until we have similiar PC architecure with similiar yeilds and similiar efficiency. Ofcourse the efficiency will never be as high as the Xenos perhaps because the Xenos was designed for 2-3 years in collaboration with Microsoft and ATI just like the Cell was designed for around 4 years by IBM Toshiba and Sony. If you take into account ATI's statement of the futuristic design of the GPU, the Efficiency and thier confidence that the graphics achievable and performance achievable will not be around until R580(unlikely) but more likely R600 which is 2 generations ahead (a directx10 card), and when we see Nvidias statements about the RSX as being a faster varient of G70 + the fact that the Xenos has special features like memexport and unified shaders which will not be readily available in PC games until direct x 10 hits and the fact that directx 10 proposed features (albiet a few of them) are in the Xenos. I think you wont disagree with me that Xenos is technically better than the G70 in terms of knowledge of what it CAN do and hopefullly will do for Xbox 360 gamers