AMD 6000 X2 WINDSOR (2MB Cache)
ASUS M2A-VM HDMI
3GB DDR2 PC800
EVGA e-GeForce 8600GT Superclocked 256MB
Windows XP Home

I've tried to start a 5box Setup with this config.
4 Sessions minimized.

It works but it's a bit laggy. I often lost 1-2 Alts.

I'd say with a better graphic card it might work.