Just a bit of FYI, newer Nvidia cards are designed to put more stress on the sytem's CPU to do graphical functions and does utilize both cores for that process. Whereas, ATI puts more stress on the GPU itself. Arma may be a single threaded game but it still will see a performance boost, at least rendering and fill, from dual core processors. Once ArmA is optimized for current hardware configs, I bet we will see C2D with Nvidia cards be on the high end of the perfomance spectrum.