Wow... I know someone who actually tried to solder RAM chips into a Macintosh computer, I think it was a Quadra model. It almost worked! He didn't fry the motherboard as I thought it would, but it didn't work. What really amazed me was that it worked at all after he removed the chips... As for what you want to do, soldering RAM chips directly onto the motherboard isn't a good idea. Even if it has empty spots for more RAM, the support chips that are needed usually aren't there. The Mac 128K->512K upgrade required adding an additional 74LS series chip(and a few other small parts) to allow the CPU to address the extra RAM. For a Mac Portable, the way to upgrade the RAM is to get a larger RAM card. Is your Portable a backlit model? Looking at GURU 2.4.3(Newer Technologies GUide to Ram Upgrades program), the Portable can handle 8MB of RAM, but the backlit model can only take 7MB of RAM. -JR http://members.tripod.com/~jrollins/index.html - Computers http://www.geocities.com/Area51/Lair/1681/ - Star Trek