I have a problem with this drive as you can see in the picture, HD Tune gives me the same result. When I first got the drive, it was fine, the maximum read speed was around 145-150 mb/s minimum 80 mb/s, that was on Vista with the Bios set to IDE as I got no performance increase with the AHCI setting plus the computer would take ages to boot; I then installed Windows 7 and got this speed of 100 mb/s, I since installed Vista back and still got the same problem. I've tried different Sata ports but nothing happened. Any ideas? Thanks to everybody in advanced.