Well I just got a new MacPro 2.8 with an Geforce 8800 6GB ram. I installed XP Pro on a 2nd hard disk and installed flight simulator x and service pack 1 & 2. I was a bit disappointed when I set everything to medium high and turned off the traffic. My frame ate was around 20 but I would get freezes about every 30 seconds for about 1 or 2 seconds. My Macbook pro does better. I really don't want to spend the money on Vista 64 to us all the memory. I am think X-plane in OS X would be better. Are there any tricks that I am missing or is flight simulator X just another MS dog?