I'd grab a $30 card and a relatively new card and call it a day. Not really gonna achieve stability otherwise probably. :<
Sure it sucks, but.. FFXI's age and lack of any effort to bring it to new hardware is showing. I've got a 1070 and reading this thread, I consider myself lucky not to have run into this stuff yet.
I used to 4box on a GTS250. It's hard to think back on those days, lol
XI Wiki

