Just upgraded our Intel Mini to 2GB and ran 8 cycles of "Rember" (v3.4) memory test successfully. Man! I am a degreed electronics engineer with 18 years experience with hardware, but this was a daunting task. It seems easy now that I have finished, but there were many opportunities to really screw it up. I don't think I ever saw so much hardware shoehorned into such a small volume. If you attempt this task, by all means check the instructions on: http://www.methodshop.com/gadgets/tutorials/macmini-ram/index.shtml Take your time and pay attention to every detail found in the above article.