I have a water cooled PC with an intel 6750 CPU and Nvidia 8800GTX graphics card. I have one install of Wow on a Raid 0 drive and the other 4 copies are symbolic linked.
My CPU normally runs at 2.67 GHz but I have overclocked it to run at 2.88 GHZ. All this on a Vista 64 machine with 4gb ram.

Before the patch I could run 5 instances of Wow without too much of a problem in targetting and fighting (outside lag in Statt). Now I get lag and slow FPS everywhere. I have the background windows set to 1 fps and the main set to 60. Has anything changed? What settings should I be running 5 instaces of Wow at? Is the machine just too old?

Please advise how you are all playing without going instance from lag and slow FPS with 5 boxing