Sorry to drudge up an old thread but I am just trying to optimize my systems performance. I currently run 4 instances of WoW on one box. I have 3.0GHz dual core, 4GB RAM, 9800GTX+. I currently run all 4 instances from 1 directory. I am going to do some testing but I wanted some suggestions first.

I have 2 SATA drives in the machine so would it be optimal to run 2 instances from their own directory per hard drive? I am going to mess around with different setups and see if I can tell a difference in performance.

I currently do not have any issues really except for first entering large cities, after about 15 seconds it clears up to the point of acting like I was running a single instance of the game.