I ran 8 each on 4 separate dual core machines and 8 on my quad core machine.

VERY slowly. I didn't turn down settings or turn off sound or anything though.

FPS were.... horrible.

Let's just say that when I got them all to the Zep... (between the hard lock reboots which took out 8 at a time) ... I loaded into UC with about .1 seconds before I loaded back.
I guess I paraphrased in my head incorrectly