Ok, any one know of freeware that will do what HD Tach will do in Win2K and SCSI? Really curious about my Cheetahs. Brad Loomis Los Angeles, CA To dramatically demonstrate the speed difference download a harddrive benchmarking program like Hd Tach from http://www.tcdlabs.com/hdtach.htm (free demo) I am running IBM 7200rpm drives in my system.. I recently built a new system for my brother using the Maxtor 7200 rpm 30 gig drive The Maxtor is much faster than my IBMs according the Hd Tach, especially the burst speed. Both computers have ata 100 controllers. 7200 rpm drives do tend to run hotter, I have mine in removable hard drive caddies with a built-in fan. My two cents. The NOSPIN Group is now offering Free PC Tech support at our newest website: http://freepctech.com