I'm going to be ordering a new mac pro this weekend with the default 2GB or Ram (two 1GB sticks) but am trying to figure out which Ram from OWC would be a compatible upgrade. The OWC says something like this: "800MHz ECC: Mac Pro Quad-Core 2.8GHz, 8-Core 3.0GHz, 8-Core 3.2GHz" I'm a little confused because I'm getting the 8-core 2.8ghz machine but they seem to list only the single quad core 2.8 in their description. Will this memory work in my machine? Also, I was looking at getting the 2GB sticks from OWC, so 4 sticks of Ram total, and still using the standard two 1GB sticks in my machine from Apple. Will this work, or do all sticks have to be the same size?