Someone bought me the new Two 2.26GHz Quad-Core Intel Xeon with 6GB (6x1GB) ram. I never upgrade memory through apple because of the price. But it would have been worth it to upgrade to 8GB (4x2GB) [Add $100.00]. But its too late now. My plan is to slowly get to 16GB (8x2GB) and the day that's not enough memory I will get a new MP. Never plan on putting 32GB in this Machine. So they say to install in pairs and on both cards. So you would need at least 4 sticks. What about in my case where I have only 2 free spots and it would not be worth it to buy 2 more 1GB stick and have no more room left. Can I get 2x2GB and add to my 6x1GB sticks? Or do I have to take out all my memory and get 4x2GB? That would seem like such a waste! I use the machine for Final Cut Studio 2.