I know the problem he is talking about because to run halo 1 on vista 64 i have to limit my ram to 2 gigs and i do it thru the same way he does. If i have to take my side off to limit my ram thats pretty useless. Then again vista 64 had bugs up intil sp1 so i am sure that sooner or later they will fix it. Other bugs include but not limited to usb card reader windows 7 bsod and on the dual monitors the mouse wont go onto the second monitor if you use extend option yet some windows will open on the second monitor and no way to adjust it so u have to use dual monitors as duplicate. Again i am sure they are working on it i use dual boot vista 64 and windows 7 64 so i have time to wait for updates and companies to fix problems.