I just upgraded my cube with a new WD Caviar hard drive (80GB, 8MB buffer). I followed all the directions in the Apple Support documents as well as the Cubeowner tip about transferring the guide rail. Now my Cube has a constant hum even though everything seems to be firmly installed. It doesn't seem to matter whether the hard drive is spinning or not. Any ideas? Thanks in advance. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com