Quote Originally Posted by 'mlwhitt',index.php?page=Thread&postID=33653#post3 3653
Last night I tried running both instances of WoW running from the same directory instead of off two different drivers and found that my performance went way up. Actually running from the same directory I managed to run both windows at max detail in 800x600 with average of 55fps. Seems to me at least with my setup the factor was running from the different drives for some reason. I would have thought that running from the same directory would have hurt my performance instead of helping it, but from my testing last night that wasn't the case.
I had 5 chars running from 2 directories, both on the same drive, and things were running great. Then yesterday I decided to create 5 separate copies of WoW to minimize settings file collisions between my clones, and I got much worse performance. My fps dropped on my main from a comfortable 60 to often in the 45 range, and I started getting runaway clones. My working theory is that by having 5 separate copies of WoW.exe I'm causing cache collisions since the system thinks it needs to treat the executables as separate.