Originally Posted by
Yimmeryams
Turn down or turn off Multisampling.
Turn down your Texture Resolution setting.
Turn off Vertical Sync and / or Triple Buffering.
Turn down your View Distance and Environmental Detail. Turning down the Ground Clutter probably will not lower much VRAM usage, if at all, but it will help general performance.
Make sure you set these settings in-game, and ensure that in the Nvidia Control Panel Anti Aliasing and Vertical Sync are set to Application Controlled for "World of Warcraft".
You may also want to turn down Pre-rendered Frames in the Nvidia Control Panel, from 3 to 1. You may or may not get a FPS drop. You may see a VRAM usage decrease. You may see an input lag decrease.
The best thing to do is evaluate which options mean the most to you, and lower them accordingly. You shouldn't have to lower all of them. You might also have some addons that increase your VRAM usage somehow. Experimenting will be the best, I think.