if the 8800 is giving you problems in ae, try disabling opengl in the preview preferences. my guess is that should eliminate most issues with ae and the graphics card.
if you do have to go this route, don’t feel like you are missing out on some great aspect of ae. opengl in ae is really just to help speed up previews, and in particular just for interactions (dragging the cti in the timeline). many ae users disable it all together due to some stability issues and limitations of opengl feature support in ae. additionally, if opengl is set to always on for previews, this will disable multiprocessing for previews.
benefits of opengl in ae are such that i wouldn’t consider upgrading a graphics card just for use in ae. you’d be far better off buying more ram.
as a matter of fact, with only 4gb, you’ll really want to look into getting more ram. with ‘render multiple frames simultaneously’ enable in the multiprocessing prefs, ae will want to have 2gb of ram per core for sd projects (so 2gb x 8cores = 16gb) and 4gb per core if you want to work with hd or 32-bit comps. if you have too little ram you will starve the processors of data and multiprocessing can actually decrease performance. check otherworldcomputing.com for good ram at good prices.
note, that you can always limit the cores that ae will take over and thus limit the amount of ram that you should have… i have an 8-core mac with 12gb of ram, i limited ae to just 6 cores, to give each core 2gb to work with and everything runs very well — the other 2 cores do aid in rendering, i can see cpu usage of over 100% for every ae background process when rendering, meaning those 2 other cores are working too (to view your processes, use the activity monitor (applications>utilities)).
Kevin Camp
Senior Designer
KCPQ, KMYQ & KRCW