For the most part i can agree with that statement but is a 1 gb 256 bit hd 6850 twice as fast as a 1gb 128bit 7770 ?
Memory/clock speed can somewhat overcome the smaller bus.
No no no, I meant that if everything else is the same THEN 256-bit is twice as fast as 128-bit. You know, perfect environment stuff
A good example is the GTX 460 256-bit vs. the 192-bit version. 25% difference, if the clocks are the same.