I'll have to watch it again but I did seem like there was a very slight amount of lag on your screen. Nothing compared to what I had before I changed the "pre-rendered frames" setting but it is there. But let me ask you this: Because you play the game with one system configuration out of the hundreds of thousands out there and are aren't seeing the problem, it means it can't exist as an ARMA 2 coding problem? That's just poor logic. If the lag is in ARMA 2 but not in other games then it would indicate a problem with ARMA 2. If it doesn't work with certain hardware configurations that work fine with other games there is a problem with the way ARMA 2 communicates with that hardware.