Thank you again my computer is now running great with 15 clients at 1600x900, 60/30, all cpu's, default nvidia settings but max performance. See the perf monitor you can see i'm maxing out of VRAM and fps is dipping to 36fps when i mount in circles in Warspear. Also with these nvidia settings perf monitor is showing all video card core load! =)
http://postimg.org/image/6jnjamxsv/

The bad news is when I launch 16 to 20 clients my computer throttles hard to 1 - .7 fps, where I can't even close the clients. No data is refreshing on monitoring apps to tell what's maxing out. I tried lowering the resolution and anything lower than 1600x900 I get this throttling symptom. Any idea what is going on?

Any guides on how to push more than 15 clients, including detailed description of settings to achieve.

Thank you <3