Hey, I know that under OS X, the maximum ram allocated to the GMA 950 is 64mb. However, under Windows, it should be up to 224mb depending on the amount of ram you have in your computer. My macbook however, only allocates 64mb to the pgu even though i have 1.25gb installed. I know that you can change this setting in the bios on a regular windows machine, but as I understand, boot camp emulates a BIOS that is not accessable by the user. I know that other macbooks have more vram allocated to the GMA when running Windows. Thus my question is: how can I change this? Also, could it depend on the fact that I have 1gb third party ram and 256 of the standard? The 256 is in the 1st slot. If I switch the ram around might this help? thanks in advance! EDIT 15/04: I know this thread is practically dead, but this information might help people with the same problem. I decided to install Vista and reformat my boot camp partition to see if it would solve this issue, and another I was having involving some of the valve HL1 mods on steam. After fiddling around with the drivers and other stuff (pre-Vista support boot camp), Aero eye candy ran really smoothly, and on top of that it solved my issue. Now I have about 90mb ram allocated to the GMA950 when surfing and carrying out other lightweight processes. You can imagine how happy I was. However, the effect this increase in vram did not prove itself to be as I expected. Whereas I was pretty stable at 55-60 fps (after setting max_fps to 60) in cs 1.6 in XP, in Vista, fps fluctuates a lot. When looking at walls I get 100fps, but in firefights I get down to 20-30, when playing the gungame mod with HLDM, I even get down to 4 (FOUR!) fps. Thought this information might be useful for somebody else. If you, like me, are looking for an increase in gaming performance by installing Vista, don't do it at this stage.