Okay so I've just got my iMac .. it's hi end 27" + i7 + 6970M 2GB Now I've done installing Windows Bootcamp Win7 32 bit) .... now I've just installed Sims3 for testing Wow .. game looks smooth even on 1440p .. but sometimes there's a bit stutter. NOW I don't like that!! NOt on Sims 3, and not on a $2300 computer .. So I look into Task Manager and there it was... It said my usable RAM is around 2.2GB while I have 4GB standard RAM installed. And I only have 5% of free RAM while Sims 3 was running. Now I understand that Windows 7 32 bit has limitation for RAM, but certainly not 2.2GB, right ?!! It should be around 3.7GB or something. Now I have 4GB of RAM, running via Bootcamp. Why Windows can't use the remaining RAM? .. it said there is around 1.7GB reserved for hardware. What hardware? 6970M has its own RAM, not shared or something, right? What have I done wrong? Does add some more RAM would help? I don't have 64bit copy of Windows7, so please help me how to get more usable RAM with 32 bit WIn7 on bootcamp?