My SC4deluxe did run better on my AMD 64 X2 4200+ system instead of my new system an Intel C2D 6400. Im using the same videocard on both systems an ATI 1600 PCI-E with 256 MB. When you set the cpu affinity to 1 core the AMD 4200+ did run great with no lagg at all even in verry large regions and lots of plugins installed The c2d isnt working at all even after a reinstall and losing the plugin directory. the only game besides BF2 i play is simcity so i really need the power for BF2 and not for Simcity, maybe an extra system only for Sc4.