Let's say you've got two mobo/vidcard cobmbinations. One of them is AGP 1x and the other is AGP 8x.

We know that the 8x rig will be great for games. But all other things being equal, will the 8x card be any better for video editing and playback, using tools like Premiere?

I don't know a lot about video editing. The only thing I know for sure the AGP bus is good for is squrting 3D textures into the video RAM. Does it also get used for frame buffers and such?