Anything above 4g will crash the game at launch and prevent it from running. "Workaround" is to remove system memory down to 4g in order to run it, as well as getting 3rd party software to set core affinity. Not exactly what I would call "compatable" with windows 7. Be warned before you drop your cash on this title. Luckily I have an old-bones Vista machine I can play this on or there would be trouble ><