R600應該是 2倍Xeon大至少要500M~520M

而G80(NV50)就很玄,以現在420M來說,有可能是G70的PS/VS強化板,PS與VS有高速連結,而且可能部份功能會有2倍核心時脈

PS:看來跟IBM學習,NV得到不少

以這篇訪問
http://www.extremetech.com/article2...,1745060,00.asp

As to whether the architectures for vertex and pixel processors should be the same, it's a good question, and time will tell the answer. It's not clear to me that an architecture for a good, efficient, and fast vertex shader is the same as the architecture for a good and fast pixel shader. A pixel shader would need far, far more texture math performance and read bandwidth than an optimized vertex shader. So, if you used that pixel shader to do vertex shading, most of the hardware would be idle, most of the time. Which is better—a lean and mean optimized vertex shader and a lean and mean optimized pixel shader or two less-efficient hybrid shaders? There is an old saying: "Jack of all trades, master of none."

要是我是NV,先提早出NV50至少能像NV40一樣搶奪先機,這次ATI的R590要扮演R420
R590要400M,NV50(G80)只有420M而且電晶體密度高於R520/R590,只能說這次ATI要花2~3年後才能重新推出有競爭力的架構