Just wanted to put a heads up about OCZ memory designed for the G5. It does not fit in the G5 iMac because of the heat spreaders. Actual one dimm fits but if you have an additional dimm no luck. I ordered the 2x 2gb matching dimms and when I received my iMac TODAY was upset when only one would fit in. I called OCZ and the lady was very nice and they said they would try to work something out, maybe remove the heatspreaders. As of now I'm waiting on a call from the tech at OCZ to find out what I can do. Besides that the new iMac rocks with 1gb!!!!!!!