There is a known issue with Square Enix's Final Fantasy XI. This has been fixed in driver versions 91.47 and above. Please visit NVIDIA's software download page to obtain the latest Forceware display driver for your graphics card. This has been verified by NVIDIA and Square Enix as having resolved the game-lag issue with Final Fantasy XI.
Final Fantasy XI performance issues with NVIDIA graphics cards
Updated 07/30/2009 05:35 PM
According to Square Enix's website, NVIDIA graphics cards experience minor issue in game-play lag when effects such as magic or songs are displayed. How do I fix this?