I am looking at getting a 2009 Mac Mini, but questioning if 4GB would be enough for my needs. I noticed there are two ram slots inside the new Mini. In theory, what would stop me from putting in (1) 4GB DDR3 so-dimm module, and (1) 2GB DDR3 so-dimm module? What is the memory limitation? Is this possible? Is there a memory-controller chip Apple uses to limit end-users from upgrading the ram to more than 4GB? I would like to buy the 2.26GHz Mac Mini w/ 2GB ram, and buy a 4GB module and a 2GB module (provided Apple used 2x1GB modules), and swap out the hard drive with a 500GB 7200rpm 2.5" drive. Ideas? Ahhh, so you folks don't need to search, here is a photo of the inside of the Mac Mini. Notice on the upper right side, that there are two ram slots.