I know any 32 bit operating system can only take up to 3GBs of RAM. I had Vista before with only 2GBs of RAM. It ran good enough. But I decided to go back to XP. But I want to upgrade 3GBs of RAM this time try again. Question is how much in exact numbers of RAM can a 32 bit system handle? 3.5?3.0? Or if anyone has more speicifics it would greatly apreicated.