Hi- Bought a 2008 mac pro this January. It turned out to be a lemon- they have replaced everything in it and still having issues. At this point the techs are recommending I replace it with a new one. I have 2x 2.8GHZ processors now. Came with only 2GB of memory but I upgraded and added another 4 GB- matching, apple approved, bought just last week from transint'l. Thought more memory might solve some of the issues (didn't). Also have Nvidia GeForce 8800 GT 512 MB. They are telling me that they have to replace it with an equivalent model, regardless of the price increase. If they replace with new model, what are the equivalent processors on the new model? Will I be able to use the same memory sticks or are they wasted? What is the equivalent video card?