This drive is fast - significantly faster than the 7K200 I upgraded from. And it's extremely quiet - I can only hear it when I put my ear up to the the drive bay in the Thinkpad, and then only very faint clicks. I would say that for everyday use it's virtually silent.
Under Windows Vista 64, the Windows Experience Index showed drive performance for the 7K200 at 5.3, and the 7K320 at 5.7.
I used HDTach to benchmark the 7K200 and the 7K320 on the exact same machine and with the exact cloned configuration. The reports show that the 7K200 average read speed is 53.2MB/s and burst 115.4MB/s, while the 7K320 average read speed is 66MB/s and burst 126.2MB/s. Of course, these bencharmarks are synthetic and real-world performance will not show this much speed improvement. Still, this shows a 9% - 24% read speed improvement, which is fantastic given this capacity.
HDTach results for 7K200:

HDTach results for 7K320

Edited to make the image links point to pages without flashing ads.










