have you read the reviews in the apple page?
https://store.apple.com/us/reviews/TW387ZM/A
some guy said "Great performance in Maya and After Effects" which is without comparision a rather unhelpful remark, but anyway.
just wanted to add, IF you buy the geforce, install the drivers first bevor connecting the card! seems to be a common problem!!!
maya 2010;
mac pro 4x2.66, 7GB RAM, ATI 1900XT, max osx 10.5.8