Hello! I bought the Arma II + the OA thing with a friend so we can both play together Day Z. Tried the singleplayer to understand the gameplay and stuff, and I realized that I had all the settings at the highest possible and it ran very smoothly.. However, when we started playing Day Z it ran awful, lagging alot and the fps got very low, I asked my friend if he had the same problem, but he didn't. I'd really aprecciate some help because the game is awesome but I can't enjoy it, and everytime I got shot I cant shoot back because of the lag. Here are my pc specs: AMD Athlon™ II X4 640 Processor 2 GB RAM ATI Radeon HD 5700 Series Thanks ! :)