Hello, I purchased a Refurb 17" iMac 1.83Ghz Core 2. It would have been the Education Model for what I gather. No Bluetooth, Combo Drive, no 802.11n wifi, and Intel GMA950 graphics. Apple Specs state max RAM = 2Gb (2x1Gb). Has anyone been successful with trying 4Gb (2x2Gb)? I ask because we also have a Black MacBook (MA701LL/A) and Apple Specs state max RAM is also 2Gb, and we have had 4Gb in it, and runs beautifully!