I am interested in what people think or know the most wow clients one PC can run at a time and what pc specs would be needed. I am not talking about running 4 or 5. I am looking at something much higher like 8 or more would be my goal.

Each wow client would run as follows
800x600, all settings on low, no mods running, each client minimized always

Since all the clients will be minimized how important will the video card be? Memory doesn't seem to be an issue since each client in my test so far only are taking 40-50mb loaded and worse case 100mb so 4-8 GB of ram would be easy to manage that. I am guessing quad core would be the way to go but would a quad core dual Xeon allow me to run much more or would that be worth it.