http://www.eqemulator.net/forums/showthread.php?t=29362
As a suggestion, check AndMetal's reply in this post at the bottom and adjust the values to match what you need. I had to tweak my eqclient.ini to get my video working smoothly as well. If you think your problem is video related and your drivers are up to date this may be the best way to fix it. Just BE SURE to make a copy of your original eqclient.ini file so if you mess it up you can always get back to where you started by copying it back.