I have a gigabyte ds3 mobo with a western digital sata 2 drive in it. I just bought this new Hitachi Deskstar sata 2 drive but although windows says 'new harddrive detected' it wont appear in 'my computer'. I have come to realise that the hitachi drive may be in sata2 mode only, and that perhaps my original drive is actually not using sata 2 either and that is why it wont recognise the original drive. So in the bios i think its set to SATA/IDE mode rather than ACHI. I get a blue screen if i turn achi mode on as it has to be installed with a fresh copy of xp. So, if it is set to IDE mode, does that mean SATA 2 isnt happening and perhaps thats why the new hitachi drive isnt being seen. Id rather not reinstall windows to get it to work. any ideas?