Thanks for the info.
I wonder why NVidia decided to add this complexity to their midrange cards. Correct me if I am wrong, but the NV30/35 never output 8 pixel values at once, only 8 Z/stencil. And, considering the limit of this particular setup (no loopbacks, single texturing and no pixel shaders) I wonder if there are REAL situations (aside synthetic benchmarks) were the ability to write 2 pixels at once is used. Dropping this feature would have saved a few transistors without affecting too much the performance in real world apps.