DO NOT follow NCsoft's instruction and get the newest driver patch for your card coz it will drop your FPS in half !
I am not too sure if the newer cards (x1k series) allow you to use windows default VGA driver or not.. but if you have a older card, like mine, a 9600pro, the windows default VGA driver works TONS better than anything else.
after testing with 2 different systems with numberous of reinstall and uninstall. I've noticed that L2 runs 40+ FPS with default windows driver while any (yes, any, believe me, I've tried from 4.2 to 7.3, all of them) ATi's official catalyst driver are doing 20ish FPS at the same spot and same settings.
Its in your Add/remove programs in the control panel, uninstall the ATI devices, including the drivers using the list generated their. then download the Old drivers again? i dont know if ATI has a guide on How to revert over delete and reinstalling.
Well, since my X700 is built into my laptop's mainboard, I can't even use the official drivers - and the ones from the laptop manufacturer were last updated 2005. :(