Horten

I'm having the same, or similar problem as you are. I've reset my control panel settings entirely, and made sure the global settings provided above were disabled. My card is a Asus nvidia GTX 550 TI 1GB, with a quadcore AMD processor. From what I understand, this card is supposed to be able to run full graphics on Arma 2. For Day Z, I barely get anything over 20fps on LOWEST settings. I get excellent FPS on most games I play. I'll continue to search for an answer, when I do, I will post it here.