The thing I guess I really need to know is if for sure a eMac (USB 2.0) with a 1GHz pro. will will be able to use the 7200 RPM 80GB HD? All of the spec. sheets and info don't see anything about the speed of the HD. I can't find and good info either way. I know these HDs work fine in the newer eMac (2005) models we have. If it matters these are education eMacs they only sold the eMac (USB 2.0) with a 1GHz pro. to education buyers I have found that out looking up info on them.