I believe this is the best I can do with my 5960X, 980 X3 SLI system (overclocked through asus bios) 20 wow clients running with 1280x720, directx9, instant swapping off, nvidia settings default but power management to max, win theme to classic, areo peak off, wow quality low, new character models off, fps 30/30, no master slot, all cpus with every window. Can I go lower with resolution? I tried 800x600 and performance didn't improve.

The bottle neck now seems to be the CPU all sitting from 94%-100%. Vcard core loads 26%-34%, VRAM 84.8%.
http://postimg.org/image/gsfd4xhfp/

I was hoping to get at least 30 clients playable with this monster rig. Any other things to try is greatly appreciated! Thank you!