It says it is all used because that is the way that Vista works. It will try to load everything to ram and keep your total ram capacity full. If it is not used by Crysis then Vista will find something else to put there. Vista is designed that way vs XP which would leave close to half your ram capacity free and then start using the page file. Don't wory about it and just play the game. Besides, since you are using a 32bit o/s you will really only use about 3.2 gig of the 4 gig anyway. To tell you the truth, I have played Crysis on my system with both 2 and 4 gig and couldn't tell the difference.