I just took out a power supply from my testing PC in which I plan to trash when I take apart all the components. Should I open the power supply? Is it safe? I heard somewhere that it is not safe to open a power supply. I know what's inside though: Rectifier and transformer. Steps down and up - transformer? AC to DC - rectifier? I took out my RAM as well. Should I trash this? No one is going to use 128MB of Synchronous ram. Everyone seems to use DDR.