Ah, wrong up there Wojtas.
The PS3 has only 512MB, not 256. Also, the RSX is exactly the same as a G70 better known as GeForce 7800 GTX, just at 90nm (no, the G71 is a bit optimized, less transistors), a tad bit faster and half memory bandwidth (128-bit), compared to it's PC counterpart (256-bit).
But everything else you said is perfectly correct :D







