Note that setting maxMem to 2000 does not mean that the game will never allocate more then 2000 MiB. The file cache is always excluded from the virtual address limit, see our developers blog. Without the -maxMem parameter the engine attempts to set this parameter internaly to a reasonable value often defaulting to max values as described above.
Sets the default X Position of the Window. Screen resolution / window size are set in arma3.cfg. Displays Arma windowed instead of full screen.