text: did your flight sim ever run on this machine? before you added the 2nd set of RAMM?\n\nWith the PC utilizing 64Mb for the video memory have you thought that it could be a video issue?  I know that in my machines I will never use the on-board video processor to handle anything, let alone games.\n\nHave you checked to see if all your BIOS is updated and all drives and firmware is good?  Kinda a shot in the dark with this but thats where I might start.\n\nAlso, check to see if there is a patch for the game running on certain chip sets/OS/hardware configurations.