15-20 Boxing Diablo III is this possible?

I want to extreme multibox D3 but I dont know if it will be possible on a single PC... I will run main and secondary windows with 800x600 minimum graphics, instant swapping off. Main window will be 640x480, secondary windows 160x120. Everything should run 30FPS constantly. I only have one D3 account so before I buy >10 D3 copies I want to know if my PC can handle it?

GTX 470, AMD Phenom II X4 3,2GHz, 8GB DDR3 RAM.

[Alge]

You do realise that there are only 4 players to a game?

I forgot that, I must be a dumbass. Well ok then. I also want to multibox WoW, I think it is possible there is it? Would it run 30FPS per window with everything on low or medium, 800x600, main 640x480, seconday 160x120. Instant swapping off.

I tried out 8 clients at the same time with the settings above and they run all at 30FPS medium settings but when I arrive even in small cities with not many NPCs it will lag for seconds. MSI Afterburner showed me Temp. 65 Celsius (while playing BF3 it is 75C), GPU load only 30-50% and GPU memory usage of 1000MB (GTX 470 1280MB). My CPU load was swapped from 50% to 70% to 60% to 90% to 100% to 90% to 80% to 70% to 90% etc.. the same with my RAM but max was 7GB (of 8GB). I guess this was a problem because of many NPCs and other Players because I play on a high populated WoW server. This means my CPU cant really handle it. So will this also be on D3 when I am in a group of four?

I also want to buy a new PC, should I go for Ivi Bridge i5 or i7. Will ISBoxer use full potential of HyperThreading? Will I get significant better frames with an i7 than i5? WoW and D3.