Is AF drive not suitable for XP or any other OSs which do not support AF?

I found that my Raptor(6G/s) running Windows XP is slower than another Raptor(3G/s) running Windows 7.

Another case, the performance of Black re3 drive seems to be better than the Raptor(6G/s).

mate… make sure that the board of your computer is sata 6, otherwise is basically the same…

transfer speed will work at the speed of the slowest connection. If your computer is sata II and the drive Sata III, the transfer speed will be handle by the Sata II port on the computer so the speed will be slow than expected.