Hi I have an aging Emachine E5250 and the hard drive seems to be on the way out (forever clicking and whirring, taking ages to load, freezing up etc) I am looking at getting a new drive and cloning the old one. The current drive is a SATA hard drive and my question is that will a newer SATA drive still be compatible? I have looked around and there seems to be SATA 150, 300, Sata II. As far as I can tell if I install a newer SATA drive and the motherboard isnt compatible it will revert to a slower SATA speed, is this correct? The drive im looking at is this .. Maxtor DIAMONDMAX23 320GB 3.5IN 7200RPM 16MB SATA300. Hope this isnt too stupid a question! Cheers.