Weird... I'm using PCI-e GeForce 6600 (plain, no GS, no GT) with 256 MB memory, don't remember the memory bus (most likely 128 bit), and I can use adveffects without any problems... Actually, I can get playable frame rates with 8SxAA and 16xAF, but I only use those settings when I'm taking screenshots. Using 4xAA gives great FPS, undependant of shockwaves or beamglows... By the way, why the hell are you using the super high end shockwaves without a super high end system in the first place? I don't remember them being remarkably better than high end versions found in adveffects (IIRC).