Not sure if this happened when I was running XP or not but heres what I noticed now that I'm running Vista 64. I haven't tried loading up multiple copies of WoW yet, but I have 2 different WoW installations for my main account, for solo or MB play. For Multiboxing my main account is in windowed mode at 1280x960, 2x FSAA, all graphics details on minimum except view distance at 1/3 and object distance at 1/2.

On my solo boxing WoW, I have 1680x1050, 8x FSAA, EVERYTHING maxed out except shadows at minimum.

Now, heres the kicker, I get HIGHER FPS on the solo boxing WoW, even when I run the MB WoW by itself with no other copies running! WTF? Something is seriously wrong with that picture. Aside from above, the only difference is that I run the solo boxing WoW in full screen. In org near the bank I get ~45-50 fps on the max settings solo wow, and ~25-30 fps on the MB WoW with low settings.

Now the question is, why the hell does this happen and how do I fix it, because I'm sure this is causing me a huge performance hit while 5 boxing.