[NAME] If you wish to replace your current hard drive with another, just about any 7200 rpm SATA hard drive would work. If you wish to spend extra and get an improvement in speed you could replace your hard drive with a 2.5" solid-state drive (SSD). To mount an SSD you will also need a 2.5" to 3.5" mounting adapter.  Here are some examples: [URL] [URL]  
I have an XPS 8300 (excellent desktop by the way), but it seems to me that the hard drive is about to die.To which modern drive can I upgrade that will be compatible with this desktop?  
XPS 8300, hard drive upgrade