Quote Originally Posted by beyond-tec
Quote Originally Posted by Bena
one card:
- good performance on main monitor; if another wow on 2nd then crappy on both
no chance to start WoW twice on one PC with two TFTs so I can see both toons?

damn..

*throws away his hardware-setup-plans*

ok... looks like I need 5 PCs instead of 3

You CAN run multiple wow instances on one pc without any problems.
I'm running 5 (1 maxmized on my main lcd and 4minimzed). The slowdowns occur when you have 1 window on main lcd and other windows on 2nd lcd. Though like the other poster said if you're running both lcds at same res and are in span mode not dual-view then the speed hit won't be so bad.

I test run 4 windows on my main 30" (1 minimized) and they were going around 20fps. Running all 5 is too much for my system (dual core fx60). Each instance windowed takes about 15-25% cpu usage; around 5% when minimized. So to run all 5 comfortable you probaly need a quad core. And as others have said running all the windows visible will impact fps as well.