-I went to the nvida site they seem to say that the card work
s with the new drivers - but the Adobe site does not mention the
the 200 series they do mention the 100 series.
If anyone is using this card with AE CS5 please lmk
The Mercury playback engine is a set of features in Premiere Pro CS5. It has nothing at all to do with After Effects.
See this page.
The graphics card is not very relevant for After Effects.