I have an early 2006 iMac 1.83 and it came with the stock 512mb RAM. I just got another 512 for the second bay basically for free. So now im running on 1gb... It wouldnt read at first but then i realized i was being too gentle with the thing and needed to shove it in deeper. (..haha..) So, will i notice much of an improvement now? Honestly for being almost 5 years old, it doesnt run much slower than my brand new MacbookPro.. (bought it yesterday!!) Or should i upgrade the iMac to 2gb to notice anything? I didnt feel like dropping too much money into it because of the 12 lcd lines i have on the screen. But its still a good machine so I use it a lot. Thoughts?