Off hand I would think texture quality would be the biggest setting, followed by AA and ray tracing...obviously game dependent, but those are probably going to make the biggest VRAM impact overall I would think.I've had a quick look, and there doesn't appear to be much in the way of a definitive guide WRT what settings can be individually dialed back in order to reduce VRAM usage. Is it really just down to the quality settings of the texture packs being used? (I don't remember for sure.... did reducing resolution to 1080p make much of a difference, or was it still a hard wall of 7GB+ usage?)