> How do I test them one at a time? The only problem I've had was > installing. > Do you mean putting each in and running the installer and seeing if it > quits? Or is there some easier way? Is there a test in OS X? So after the installation everything seems to be funning fine? Doh... I'd expect kernel panics every so often. Leave it running for a couple of days and see if it is stable or not. Or you can do the 'install' test. as i understand it fails before writing anything to a HD...