I think generally the chips are better then the card, I read this on a forum of a German PS2-internet shop, except the Magic chip which works with 5 V, it´s too much for the PS2. With the card you have to open the CD-Tray without pressing the button, so it´s like opening the CD-tray of your computer without pressing the button. They said it´s quite dangerous, and if you destroy your PS2 the warranty doesn´t work.