Xbench 1.0 gave the old configuration a rating of 50.96 with disc test at <55.61. The new configuration (system carbon copied from the old drive) got <an overall rating of 54.48, but more importantly a 82.56 for the disc test. Hmmm I got 102 on my new 80GB 'Cuda 7200 - don't know how much cache it got... Boris