I have a 20" iMac (2006) model. These are the specs: I also have a new MB (2.4 4gb). The iMac I have is the early 2006 model that wont allow me to go past 2gb ram. Now I know that due to the 4gb of ram, the MB will run faster, also because of the processor. I was just wondering if anyone had any suggestions on how to speed up my iMac? I run Onyx from time to time, and I verify the disk, but there is such a big difference between the two, especially through Firefox. Any suggestions?