I tried the low quality renderer and performance increases but it looks so terrible! At least compared to running the game in normal, even with graphics turned way down.

@void: I only have a Q6600, so no virtual cores to work with. Only trying to run two clients though, so maybe I will dig up the thread on core assignment again and see what I can do with it. I did try assigning them in ISBoxer, main to core 1 and 2, slave to core 3 and 4 but didn't see a marked improvement... I will revisit this to see if I can get more out of it for sure.