Where is the beloved driver support now?
Unlike a certain green company, the 3870X2 will remain in the INF for driver releases for a long time, and still have optimizations passed down from the 4XXX series.
At least these red guys don't treat you as second class citizens after they release a new top-dog chip.
Plus, the GX2 didn't really have enough RAM to have decent performance above the 8800GTX SLi setup either, thanks to nVidia's bad memory management on this new architecture (more than 512MB then it's all good though)
Just see the new 4850X2 review from FiringSquad. Compare the 4850X2 with the 9800GTX+ SLi setup. If that isn't pure ownage I don't know what is.
It's a $600+ card yet had performance degrading so much in little time.