Also note that this is a 10 year old game, that is designed to run on older software/technology that is more or less getting phased out by Microsoft (DX9 and older are emulated in Vista/Win7--XP is the last OS with native DX8/9 support), and thus by the vendors as well (more effort is put into DX11 drivers for Win7 than any other Windows release now).

In other words, the latest and greatest hardware/software is not always the best for FFXI. Might need to revert to older drivers.