Gentlemen, I have not done any of this YET with the Mac Mini. But be it know that some of the manufactures original specs are based on what is being produced at the time if 1GB memory sticks were all that was around then Apple would have to say the most memory possible is 2 GB with 2 memory slots available, That does NOT mean that when memory companies started producing 2GB memory modules that they would not work and you could now have 4 GB of memory as in this case. of course I don't know absolutely if this is the case here. but it certainly has been true in many other cases so I would thoroughly check it out. As a tech I have proven this statement true in other cases many times. with Memory and CPU's.