Running 5

Main gets about 35-60 average.
Alts get about 25-30. (capped at 30)

2 monitors, main on one screen, alts spread via maximiser on second screen.

When only 4 toons running, fps is over 80 on each...

I found the biggest increase in performance came from dumping certain addons out of the mix...Namely questhelper and auctioneer.

Huge increase.

Core2 Duo 8500 @ 3.5G, 8800GTX 640mb, VIsta 64bit, 8G RAM.

My HD's are crap...thats my bottleneck.

I need to mess around with my directories by the sounds of it....spread the load around....