Nvidia are using 256 bit bus, not 128.
can you please point me to the nV Press Release that shows this? Oh thats right it does not exsit
Anyways dont forget nV30 will be using high speed DDR2 which is still very costly at the moment. Also the yield point is really a har one. How good are the yeilds on the R9700? If they are decent then it may prove to be cheaper to make. The only advantage cost wise is volume of scale of the .13u process. The better the yeild the lower the cost. nV is going to lose money if they end up throwing 70% of the silicon away. Finally packaging can add cost. I have no idea how NV30 will be packaged. Too many unkowns for now...