Its hardly feasible to judge a companies performance based on a game that is years old built originally for the PS2, and ported over to the PC for DirectX8... Not to mention on an operating system that is utter crap atm. I'm hardly an Intel fanboy, i've owned multiple processors and graphics cards from both Intel and AMD, and NVIDIA/ATI. However no matter which was you cut it, Intel is outperforming AMD at the moment. That will remain to be seen however, if AMD ever releases their new line of processors. I believe the codename is Barcelona?
Anyhow, i'm running a 8800GTS 640MB, C2D E6750, and FFXI runs amazing. Zero lag in Whitegate (waiting to try out dynamis). However i'm using Windows XP Pro. Like others have said, I think all these issues stem from the combination of 8 series nvidia cards, vista, and ffxi.
I would recommend ditching Vista. Have no idea why people buy it. It has a pretty interface, but it still has way to many bugs in it.
XI Wiki

