Sorry to tell ya, any card made in the past six years is more than enough for AE. The OpenGL capabilities have been greatly oversold when it was released in v6 in 2003. And for some reason it refuses to die. There's a question at least weekly wondering if a specific card is "good for AE" or "make AE faster". But really, *ANY* modern computer that has a separate GPU (as opposed to Intel integrated graphics) is more than enough to run AE.
so it doesnt matter at all about the card then, so even if the above card has 4gb memory . so effectively no card would be as effective as haveing a 6 year old card. so it really is all about the type and speed of the hard drives how mahy drives there are, the cpu, memry, motherboard.
so i guess the card is only ever revelant with it concerns premier pro, but if im correct its only really cuda thats effective tere and even then its subject to its limitations of the use on cuda.
This video gives details of what the video card does for After Effects:
The gist is that Navarro is right and the choice of video card doesn't much matter for After Effects.