1.pls make sure that your computer's interface is sata3 before purchase,and you need to know that the the speed of sata2 is no more than 300 mb/s,and the speed of sata1 is no more than 150 mb/s,as the controller limited.
2.there are so many factors to influence the test speed.(such as the computer's configuration, the testing software etc.).so pls dont open the dispute if your test speed is a little difference from ours.