I purchased an Intel 320 SATAII drive earlier this week and enjoyed it so much I moved it to my 2009 MBP and purchased an Intel 510 SATAIII for my 2011 MBP today. Everything is all done, system is not indexing, no additional programs running, everything should be great. First I ran Disk Speed Test which I didn't have yet with the 320. http://i.imgur.com/SAPPT.jpg I was surprised at both numbers being SATAIII so I checked the system status to make sure it connected at 6 Gigabit. http://i.imgur.com/tow0F.jpg Sure enough it was so I wanted to compare the performance to the 320 I had in previously and had some saved Xbench results from. Here is a side by side of the 510 and the 320. The results did not please me and I'm not sure why they are what they are. http://i.imgur.com/8drH8.jpg Tell me what you think guys....what's going on?