My iMac was starting to run a bit sluggish so I figured it was time to up the ram from the factory 1gb. So I bought a 2gb stick and tossed it in there. I left one of the 512 sticks in there aswell. Any ideas why in about this mac I would only be getting 2gb? Even though I actually have 2.5gb in the machine? Can someone also explain to me what Wired, Active, Inactive, And Free ram actually mean. I keep a close eye on those numbers in istat and really have no idea what they mean...lol