Are you referring to the driver posted in this thread?
http://forums.guru3d.com/showthread....20#post4645120
I haven't tried it yet but I may after I give 326.80 some more testing. Reading the information in that thread it seems 326.84 is an incomplete driver and only includes changes in OpenGL, meaning you will need to keep the PhysX files from 326.80, is that correct?
I may have made a mistake in thinking I was on 326.80 when I made my first post when I was actually on 326.80. Either way I want to give 326.80 its fair shot before attempting a move to 326.84 (unless NVIDIA throws it up on their site). Either way, with the server issues its hard to get into the game to test but I played last night for about two hours without any issue with 326.80, but that doesn't mean much as I have been able to play for twice that length of time before problems started arising.
I will hopefully get more testing done this Saturday when can play for an extended period of time (servers willing). If 326.80 crashes and burns (as I expect it will) I will then give 326.84 a try. Also, I am going to attempt to do a better stress test using furmark or prime95. While Uniengine can be stressful for a graphics card, I don't think it stresses the whole system, like Prime95 or Furmark do, which is what I (and probably everyone else) need to do now to verify system stability outside of the game. I will probably do that tonight and post the results. I assume if my machine can make it through a one hour stress test with either (or both) my machine is probably fine and just as capable as anyone else's that isn't have problems.
I will also look into the possible PhysX workaround posted above. I don't know if FFXIV uses PhysX (it would be nice if it does, being an NVIDIA user) but it's worth a shot regardless.