I just built a new comp. I changed the below components and kept the 2 Maxtor HDDs. My bro in law sent me this E mail. Don't quite understand what he is saying to do. (WIN XP) When you can do: Your hard drives will need to be set for full speed ATA access also. You might only be accessing at ATA66 because your other mother board only went that high when we set up your hard drive before and ran the hard drive utilites. Maxter also has an utilty for controling the noise of the hard drive. It is set by default for quiet access which actualy slows down the read write access in the drive, and not it's interface speed. This effectively slows down the data aquisition speed through your ATA133 interface even though the ATA133 is working correctly.