i ran 5 on a much smaller system... but then again, i wasn't running vista and all my windows were 800x600.

are you running all those displays off a single machine? 3? out of curiosity, can you move windows between the monitors (ie: is it spanning)

one thing that is definitely hurting your cpu and fps would be the massive 1600x1200 main window (5.7MB/frame). try dropping the main to something like 1280x1024 (3.9MB/frame) or lower. less pixels == less work for the cpu to render/push.. the difference would be about 1.8MB per frame... not insignificant. i would guess you would see a jump from 10fps (5.7MBpf * 10) to about 15fps (3.9MBpf * 15)

how about dropping one of the monitors and running your support clones in a 2x2 maximizer grid? that would cut down on data across the bus. that could improve your data path even more... data bus pushing only so much... divide by 3... instead, drop a monitor and the same path should be able to push more to each monitor... max through put divide by 2.

(these are all just back-of-the-pizzabox figures)*

i had also read something about multi monitors being slow on the non-main monitor. could this be effecting your rig?

btw, i have a new version that allows you to specify cpu affinity for the individual commands... but i don't have a dual/quad core with me... any guinea pigs willing to beta? if so, please send me a PM

* edit: i realized that i was assuming 24 bit color... many systems use 32 bit color. adjust accordingly to determine throughput